WO2010132589A2 - Outgassing method for inspecting a coated surface - Google Patents
Outgassing method for inspecting a coated surface Download PDFInfo
- Publication number
- WO2010132589A2 WO2010132589A2 PCT/US2010/034582 US2010034582W WO2010132589A2 WO 2010132589 A2 WO2010132589 A2 WO 2010132589A2 US 2010034582 W US2010034582 W US 2010034582W WO 2010132589 A2 WO2010132589 A2 WO 2010132589A2
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- WO
- WIPO (PCT)
- Prior art keywords
- vessel
- coating
- processing
- holder
- pecvd
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/54—Apparatus specially adapted for continuous coating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/04—Coating on selected surface areas, e.g. using masks
- C23C16/045—Coating cavities or hollow spaces, e.g. interior of tubes; Infiltration of porous substrates
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/50—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges
- C23C16/503—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using electric discharges using dc or ac discharges
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/52—Controlling or regulating the coating process
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/3129—Syringe barrels
- A61M2005/3131—Syringe barrels specially adapted for improving sealing or sliding
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
- G01N21/9072—Investigating the presence of flaws or contamination in a container or its contents with illumination or detection from inside the container
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
- G01N21/9081—Inspection especially designed for plastic containers, e.g. preforms
Definitions
- the present invention relates to the technical field of fabrication of coated vessels for storing biologically active compounds or blood.
- the invention relates to a vessel processing system for coating of a vessel, vessel processing system for coating and inspection of a vessel, to a portable vessel holder for a vessel processing system, to a plasma enhanced chemical vapour deposition apparatus for coating an interior surface of a vessel, to a method for coating an interior surface of a vessel, to a method for coating an inspection of a vessel, to a method of processing a vessel, to the use of a vessel processing system, to a computer-readable medium and to a program element.
- a method for inspecting the product of a coating process is provided. Therein, the release of at least one volatile species from the coated surface into the gas space adjacent to the coated surface is measured and the result is compared with the result for at least one reference object measured under the same test conditions. Thus the presence or absence of the coating, and/or a physical and/or chemical property of the coating can be determined.
- the method is useful for inspecting any coated articles, e.g. vessels. Its application on the inspection of PECVD coatings made from organosilicon precursors, especially of barrier coatings, is also disclosed.
- the present disclosure also relates to improved methods for processing vessels, for example multiple identical vessels used for venipuncture and other medical sample collection, pharmaceutical preparation storage and delivery, and other purposes. Such vessels are used in large numbers for these purposes, and must be relatively economical to manufacture and yet highly reliable in storage and use. BACKGROUND OF THE INVENTION
- evacuated blood collection tubes are used for drawing blood from a patient for medical analysis.
- the tubes are sold evacuated.
- the patient's blood is communicated to the interior of a tube by inserting one end of a double-ended hypodermic needle into the patient's blood vessel and impaling the closure of the evacuated blood collection tube on the other end of the double-ended needle.
- the vacuum in the evacuated blood collection tube draws the blood (or more precisely, the blood pressure of the patient pushes the blood) through the needle into the evacuated blood collection tube, increasing the pressure within the tube and thus decreasing the pressure difference causing the blood to flow.
- the blood flow typically continues until the tube is removed from the needle or the pressure difference is too small to support flow.
- Evacuated blood collection tubes should have a substantial shelf life to facilitate efficient and convenient distribution and storage of the tubes prior to use. For example, a one-year shelf life is desirable, and progressively longer shelf lives, such as 18 months, 24 months, or 36 months, are also desired in some instances.
- the tube desirably remains essentially fully evacuated, at least to the degree necessary to draw enough blood for analysis (a common standard is that the tube retains at least 90% of the original draw volume), for the full shelf life, with very few (optimally no) defective tubes being provided.
- a defective tube is likely to cause the phlebotomist using the tube to fail to draw sufficient blood. The phlebotomist might then need to obtain and use one or more additional tubes to obtain an adequate blood sample.
- prefilled syringes are commonly prepared and sold so the syringe does not need to be filled before use.
- the syringe can be prefilled with saline solution, a dye for injection, or a pharmaceutically active preparation, for some examples.
- the prefilled syringe is capped at the distal end, as with a cap, and is closed at the proximal end by its drawn plunger.
- the prefilled syringe can be wrapped in a sterile package before use.
- the packaging and cap are removed, optionally a hypodermic needle or another delivery conduit is attached to the distal end of the barrel, the delivery conduit or syringe is moved to a use position (such as by inserting the hypodermic needle into a patient's blood vessel or into apparatus to be rinsed with the contents of the syringe), and the plunger is advanced in the barrel to inject the contents of the barrel.
- a further consideration when regarding syringes is to ensure that the plunger can move at a constant speed and with a constant force when it is pressed into the barrel.
- a lubricity coating is desirable.
- the present invention provides a method of coating a surface, for example the interior surface of a vessel, with a coating made by PECVD from an organosilicon precursor. Furthermore, the present invention provides the resulting coating, a vessel coated with such coating, and the use of the coating, e.g. as lubricity coating, hydrophobic coating, or barrier coating. Moreover, apparatus and several devices for performing the invention are provided. The invention also provides inspection methods for the coating, in particular a method utilizing the outgassing of volatile species by the coated surface for said inspection.
- the present invention pertains to a method of preparing a coating by plasma enhanced chemical vapor deposition treatment (PECVD), and for example a method of coating the interior surface of a vessel.
- PECVD plasma enhanced chemical vapor deposition treatment
- a surface for example an interior vessel surface, is provided, as is a reaction mixture comprising an organosilicon compound gas, optionally an oxidizing gas, and optionally a hydrocarbon gas.
- the surface is contacted with the reaction mixture.
- Plasma is formed in the reaction mixture.
- said plasma is non-hollow cathode plasma or, in another expression for the same condition, said plasma is substantially free of hollow cathode plasma.
- the coating is deposited on at least a portion of the surface, e.g. a portion of the vessel interior wall.
- a precursor is provided.
- said precursor is an organosilicon compound (in the following also designated as "organosilicon precursor"), more preferably an organosilicon compound selected from the group consisting of a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, an alkyl trimethoxysilane, an aza analogue of any of these precursors (i.e. a linear siloxazane, a monocyclic siloxazane, a polycyclic siloxazane, a polysilsesquioxazane), and a combination of any two or more of these precursors.
- the precursor is applied to a substrate under conditions effective to form a coating by PECVD.
- the precursor is thus polymerized, crosslinked, partially or fully oxidized, or any combination of these.
- the coating is a lubricity coating, i.e. it forms a surface having a lower frictional resistance than the uncoated substrate.
- the coating is a passivating coating, for example a hydrophobic coating resulting, e.g., in a lower precipitation of components of a composition in contact with the coated surface.
- a hydrophobic coating is characterized by a lower wetting tension than its uncoated counterpart.
- a lubricity coating of the present invention may also be a passivating coating and vice versa.
- the coating is a barrier coating, for example an SiO x coating.
- the barrier is against a gas or liquid, preferably against water vapor, oxygen and/or air.
- the barrier may also be used for establishing and/or maintaining a vacuum inside a vessel coated with the barrier coating, e.g. inside a blood collection tube.
- the method of the invention may comprise the application of one or more additional coatings made by PECVD from an organosilicon precurosr.
- An optional additional step is post-treating the SiO x coating with a process gas consisting essentially of oxygen and essentially free of a volatile silicon compound.
- present invention provides a lubricity coating.
- This coating is advantageously made by the PECVD method and using the precursors as described above.
- the present invention provides a method for setting the lubricity properties of a coating on a substrate surface, the method comprising the steps:
- a preferred precursor for the lubricating coating is a monocyclic siloxane, for example octamethylcyclotetrasiloxane (OMCTS).
- OCTS octamethylcyclotetrasiloxane
- the resulting coated surface has a lower frictional resistance than the untreated substrate.
- the lubricity coating is effective to provide a breakout force or plunger sliding force, or both that is less than the corresponding force required in the absence of the lubricating coating.
- the article coated with the lubricity coating may be a vessel having the lubricating coating on a wall, preferably on the interior wall, e.g. a syringe barrel, or a vessel part or vessel cap having said coating on the vessel contacting surface, e.g. a syringe plunger or a vessel cap.
- the lubricity coating may in one aspect have the formula Si w O x CyH z , for example where w is 1 , x is w is 1 , x is from about 0.5 to about 2.4, y is from about 0.6 to about 3, and z is from about 2 to about 9, preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9.
- Passivating for example Hydrophobic Coating
- the passivating coating according to the present invention is for example a hydrophobic coating.
- a preferred precursor for the passivating for example the hydrophobic coating is a linear siloxane, for example hexamethyldisiloxane (HMDSO).
- HMDSO hexamethyldisiloxane
- a passivating coating according to the present invention prevents or reduces mechanical and/or chemical effects of the uncoated surface on a compound or composition contained in the vessel. For example, precipitation and/or clotting or platelet activation of a compound or component of a composition in contact with the surface are prevented or reduced, e.g. blood clotting or platelet activation or precipitation of insulin, or wetting of the uncoated surface by an aqueous fluid is prevented.
- a particular aspect of the invention is a surface having a hydrophobic coating with the formula Si w O x CyH z , for example where w is 1 , x is from about 0.5 to about 2.4, y is from about 0.6 to about 3, and z is from about 2 to about 9, preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9.
- the article coated with the passivating coating may be a vessel having the coating on a wall, preferably on the interior wall, e.g. a tube, or a vessel part or vessel cap having said coating on the vessel contacting surface, e.g. a vessel cap.
- the coating method comprises several steps.
- a vessel is provided having an open end, a closed end, and an interior surface.
- At least one gaseous reactant is introduced within the vessel.
- Plasma is formed within the vessel under conditions effective to form a reaction product of the reactant, i.e. a coating, on the interior surface of the vessel.
- the method is performed by seating the open end of the vessel on a vessel holder as described herein, establishing a sealed communication between the vessel holder and the interior of the vessel.
- the gaseous reactant is introduced into the vessel through the vessel holder.
- a plasma enhanced chemical vapor deposition (PECVD) apparatus comprising a vessel holder, an inner electrode, an outer electrode, and a power supply is used for the coating method according to the present invention.
- the vessel holder has a port to receive a vessel in a seated position for processing.
- the inner electrode is positioned to be received within a vessel seated on a vessel holder.
- the outer electrode has an interior portion positioned to receive a vessel seated on the vessel holder.
- the power supply feeds alternating current to the inner and/or outer electrodes to form a plasma within the vessel seated on the vessel holder.
- the power supply feeds alternating current to the outer electrode while the inner electrode is grounded.
- the vessel defines the plasma reaction chamber.
- the PECVD apparatus as described in the preceding paragraphs comprises a gas drain, not necessarily including a source of vacuum, to transfer gas to or from the interior of a vessel seated on the port to define a closed chamber.
- the PECVD apparatus includes a vessel holder, a first gripper, a seat on the vessel holder, a reactant supply, a plasma generator, and a vessel release.
- the vessel holder is configured for seating to the open end of a vessel.
- the first gripper is configured for selectively holding and releasing the closed end of a vessel and, while gripping the closed end of the vessel, transporting the vessel to the vicinity of the vessel holder.
- the vessel holder has a seat configured for establishing sealed communication between the vessel holder and the interior space of the first vessel.
- the reactant supply is operatively connected for introducing at least one gaseous reactant within the first vessel through the vessel holder.
- the plasma generator is configured for forming plasma within the first vessel under conditions effective to form a reaction product of the reactant on the interior surface of the first vessel.
- the vessel release is provided for unseating the first vessel from the vessel holder.
- a gripper which is the first gripper or another gripper is configured for axially transporting the first vessel away from the vessel holder and then releasing the first vessel.
- the method is for coating an inner surface of a restricted opening of a vessel, for example a generally tubular vessel, by PECVD.
- the vessel includes an outer surface, an inner surface defining a lumen, a larger opening having an inner diameter, and a restricted opening that is defined by an inner surface and has an inner diameter smaller than the larger opening inner diameter.
- a processing vessel is provided having a lumen and a processing vessel opening. The processing vessel opening is connected with the restricted opening of the vessel to establish communication between the lumen of the vessel to be processed and the processing vessel lumen via the restricted opening. At least a partial vacuum is drawn within the lumen of the vessel to be processed and the processing vessel lumen.
- a PECVD reactant is flowed through the first opening, then through the lumen of the vessel to be processed, then through the restricted opening, then into the processing vessel lumen.
- Plasma is generated adjacent to the restricted opening under conditions effective to deposit a coating of a PECVD reaction product on the inner surface of the restricted opening.
- the present invention further provides the coating resulting from the method as described above, a surface coated with said coating, and for example a vessel coated with said coating.
- the surface coated with the coating may be glass or a polymer, preferably a thermoplastic polymer, more preferably a polymer selected from the group consisting of a polycarbonate, an olefin polymer, a cyclic olefin copolymer and a polyester.
- a polymer selected from the group consisting of a polycarbonate, an olefin polymer, a cyclic olefin copolymer and a polyester.
- it is a cyclic olefin copolymer, a polyethylene terephthalate or a polypropylene.
- the vessel wall has an interior polymer layer enclosed by at least one exterior polymer layer.
- the polymers may be same or different.
- one of the polymer layers of a cyclic olefin copolymer (COC) resin e.g., defining a water vapor barrier
- another polymer layer is a layer of a polyester resin.
- Such vessel may be made by a process including introducing COC and polyester resin layers into an injection mold through concentric injection nozzles.
- the coated vessel of the invention may be empty, evacuated or (pre)filled with a compound or composition.
- a particular aspect of the invention is a vessel having a passivating coating, for example a hydrophobic coating as defined above.
- a further particular aspect of the invention is a surface having a lubricity coating as defined above. It may be a vessel having the lubricity coating on a wall, preferably on the interior wall, e.g. a syringe barrel, or a vessel part or vessel cap having said coating on the vessel contacting surface, e.g. a syringe plunger or a vessel cap.
- a particular aspect of the invention is a syringe including a plunger, a syringe barrel, and a lubricity coating as defined above on either one or both of these syringe parts, preferably on the inside wall of the syringe barrel.
- the syringe barrel includes a barrel having an interior surface slidably receiving the plunger.
- the lubricity coating may be disposed on the interior surface of the syringe barrel, or on the plunger surface contacting the barrel, or on both said surfaces. The lubricity coating is effective to reduce the breakout force or the plunger sliding force necessary to move the plunger within the barrel.
- a further particular aspect of the invention is a syringe barrel coated with the lubricity coating as defined in the preceding paragraph.
- the syringe barrel comprises a barrel defining a lumen and having an interior surface slidably receiving a plunger.
- the syringe barrel is advantageously made of thermoplastic material.
- a lubricity coating is applied to the barrel interior surface, the plunger, or both, by plasma-enhanced chemical vapor deposition (PECVD).
- PECVD plasma-enhanced chemical vapor deposition
- a solute retainer is applied over the lubricity coating by surface treatment, e.g. in an amount effective to reduce a leaching of the lubricity coating, the thermoplastic material, or both into the lumen.
- the lubricity coating and solute retainer are composed, and present in relative amounts, effective to provide a breakout force, plunger sliding force, or both that is less than the corresponding force required in the absence of the lubricity coating and solute retainer.
- Still another aspect of the invention is a syringe including a plunger, syringe barrel, and interior and exterior coatings.
- the barrel has an interior surface slidably receiving the plunger and an exterior surface.
- a lubricity coating is on the interior surface, and an additional barrier coating of SiOx, in which x is from about 1.5 to about 2.9, may be provided on the interior surface of the barrel.
- a barrier coating e.g. of a resin or of a further SiO x coating, is provided on the exterior surface of the barrel.
- a syringe including a plunger, a syringe barrel, and a Luer fitting.
- the syringe barrel has an interior surface slidably receiving the plunger.
- the Luer fitting includes a Luer taper having an internal passage defined by an internal surface.
- the Luer fitting is formed as a separate piece from the syringe barrel and joined to the syringe barrel by a coupling.
- the internal passage of the Luer taper has a barrier coating of SiOx, in which x is from about 1.5 to about 2.9.
- FIG. 60 Another aspect of the invention is a plunger for a syringe, including a piston and a push rod.
- the piston has a front face, a generally cylindrical side face, and a back portion, the side face being configured to movably seat within a syringe barrel.
- the plunger has a lubricity coating according to the present invention on its side face.
- the push rod engages the back portion of the piston and is configured for advancing the piston in a syringe barrel.
- the plunger may additionally comprise a SiO x coating.
- a further aspect of the invention is a vessel with just one opening, i.e. a vessel for collecting or storing a compound or composition.
- a vessel for collecting or storing a compound or composition.
- Such vessel is in a specific aspect a tube, e.g. a sample collecting tube, e.g., a blood collecting tube.
- Said tube may be closed with a closure, e.g. a cap or stopper.
- a closure e.g. a cap or stopper.
- Such cap or stopper may comprise a lubricity coating according to the present invention on its surface which is in contact with the tube, and/or it may contain a passivating coating according to the present invention on its surface facing the lumen of the tube.
- such stopper or a part thereof may be made from an elastomeric material.
- Such a stopper may be made as follows: The stopper is located in a substantially evacuated chamber. A reaction mixture is provided including an organosilicon compound gas, optionally an oxidizing gas, and optionally a hydrocarbon gas. Plasma is formed in the reaction mixture, which is contacted with the stopper. A coating is deposited on at least a portion of the stopper.
- a further aspect of the invention is a vessel having a barrier coating according to the present invention.
- the vessel is generally tubular and may be made of thermoplastic material.
- the vessel has a mouth and a lumen bounded at least in part by a wall.
- the wall has an inner surface interfacing with the lumen.
- an at least essentially continuous barrier coating made of SiO x as defined above is applied on the inner surface of the wall.
- the barrier coating is effective to maintain within the vessel at least 90% of its initial vacuum level, optionally 95% of its initial vacuum level, for a shelf life of at least 24 months.
- a closure is provided covering the mouth of the vessel and isolating the lumen of the vessel from ambient air.
- the PECVD made coatings and PECVD coating methods using an organosilicon precursor described in this specification are also useful for coating catheters or cuvettes to form a barrier coating, a hydrophobic coating, a lubricity coating, or more than one of these.
- a cuvette is a small tube of circular or square cross section, sealed at one end, made of a polymer, glass, or fused quartz (for UV light) and designed to hold samples for spectroscopic experiments. The best cuvettes are as clear as possible, without impurities that might affect a spectroscopic reading. Like a test tube, a cuvette may be open to the atmosphere or have a cap to seal it shut.
- the PECVD-applied coatings of the present invention can be very thin, transparent, and optically flat, thus not interfering with optical testing of the cuvette or its contents.
- a specific aspect of the invention is a coated vessel as described above which is prefilled or used for being filled with a compound or composition in its lumen.
- Said compound or composition may be
- a biologically active compound or composition preferably a medicament, more preferably insulin or a composition comprising insulin;
- a biological fluid preferably a bodily fluid, more preferably blood or a blood fraction
- a compound or composition for combination with another compound or composition directly in the vessel e.g. a compound for the prevention of blood clotting or platelet activation in a blood collection tube, like citrate or a citrate containing composition.
- the coated vessel of the present invention is particularly useful for collecting or storing a compound or composition which is sensitive to mechanical and/or chemical effects of the surface of the uncoated vessel material, preferably for preventing or reducing precipitation and/or clotting or platelet activation of a compound or a component of the composition in contact with the interior surface of the vessel.
- a cell preparation tube having a wall provided with a hydrophobic coating of the present invention and containing an aqueous sodium citrate reagent is suitable for collecting blood and preventing or reducing blood coagulation.
- the aqueous sodium citrate reagent is disposed in the lumen of the tube in an amount effective to inhibit coagulation of blood introduced into the tube.
- a specific aspect of the invention is a vessel for collecting/receiving blood or a blood containing vessel.
- the vessel has a wall; the wall has an inner surface defining a lumen.
- the inner surface of the wall has an at least partial hydrophobic coating of the present invention.
- the coating can be as thin as monomolecular thickness or as thick as about 1000 nm.
- the blood collected or stored in the vessel is preferably viable for return to the vascular system of a patient disposed within the lumen in contact with the coating.
- the coating is effective to reduce the clotting or platelet activation of blood exposed to the inner surface, compared to the same type of wall uncoated.
- Another aspect of the invention is an insulin containing vessel including a wall having an inner surface defining a lumen.
- the inner surface has an at least partial hydrophobic coating of the present invention.
- the coating can be from monomolecular thickness to about 1000 nm thick on the inner surface.
- Insulin or a composition comprising insulin is disposed within the lumen in contact with the coating.
- the coating is effective to reduce the formation of a precipitate from insulin contacting the inner surface, compared to the same surface absent the coating.
- the present invention thus provides the following embodiments with regard to coating methods, coated products and use of said products:
- the lubricity characteristics of the coating are set by setting the ratio of the 02 to the organosilicon precursor in the gaseous reactant, and/or by setting the electric power used for generating the plasma.
- hydrophobic characteristics of the coating are set by setting the ratio of the 02 to the organosilicon precursor in the gaseous reactant, and/or by setting the electric power used for generating the plasma.
- Electrodes powered with sufficient power to form a coating on the substrate surface preferably with electrodes supplied with an electric power of from 0.1 to 25 W, preferably from 1 to 22 W, more preferably from 3 to 17 W, even more preferably of from 5 to 14 W, most preferably of from 7 to 11 W, in particular of 8 W; and/or
- 10 W/ml preferably is from 5 W/ml to 0.1 W/ml, more preferably is from 4 W/ml to 0.1 W/ml, most preferably from 2 W/ml to 0.2 W/ml.
- barrier characteristics of the coating are set by setting the ratio of the 02 to the organosilicon precursor in the gaseous reactant, and/or by setting the electric power used for generating the plasma.
- Electrodes powered with sufficient power to form a coating on the substrate surface preferably with electrodes supplied with an electric power of from 8 to 500 W, preferably from 20 to 400 W, more preferably from 35 to 350 W, even more preferably of from 44 to 300 W, most preferably of from 44 to 70 W; and/or
- the ratio of the electrode power to the plasma volume is equal or more than 5 W/ml, preferably is from 6 W/ml to 150 W/ml, more preferably is from 7 W/ml to 100 W/ml, most preferably from 7 W/ml to 20 W/ml.
- organosilicon precursor is selected from the group consisting of a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysesquioxane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, an alkyl trimethoxysiloxane, and a combination of any two or more of these compounds, preferably is a linear or monocyclic siloxane.
- the substrate is a polymer selected from the group consisting of a polycarbonate, an olefin polymer, a cyclic olefin copolymer and a polyester, and preferably is a cyclic olefin copolymer, a polyethylene terephthalate or a polypropylene.
- (i) has a lower wetting tension than the uncoated surface, preferably a wetting tension of from 20 to 72 dyne/cm, more preferably a wetting tension of from 30 to 60 dynes/cm, more preferably a wetting tension of from 30 to 40 dynes/cm, preferably 34 dyne/cm; and/or
- the coating is situated between the SiOx layer and the substrate surface or vice versa, or wherein
- the coating is situated between two SiOx layers or vice versa, or wherein
- the layers of SiOx and the coating are a graded composite of SiwOxCyHz to SiOx or vice versa.
- the coated vessel according to any of (29) to (31 ) which contains a compound or composition in its lumen, preferably a biologically active compound or composition or a biological fluid, more preferably (i) citrate or a citrate containing composition, (ii) a medicament, in particular insulin or an insulin containing composition, or (iii) blood or blood cells.
- a compound or composition in its lumen preferably a biologically active compound or composition or a biological fluid, more preferably (i) citrate or a citrate containing composition, (ii) a medicament, in particular insulin or an insulin containing composition, or (iii) blood or blood cells.
- a biologically active compound or composition preferably a medicament, more preferably insulin or a composition comprising insulin wherein insulin precipitation is reduced or prevented; or
- a biological fluid preferably a bodily fluid, more preferably blood or a blood fraction wherein blood clotting and/or platelet activation is reduced or prevented.
- a medical or diagnostic kit comprising a coated vessel according to present invention which may additionally comprise: a medicament or diagnostic agent which is contained in said coated vessel; and/or a hypodermic needle, double-ended needle, or other delivery conduit; and/or an instruction sheet.
- the present invention further provides the following embodiments: I. VESSEL PROCESSING SYSTEM HAVING MULTIPLE PROCESSING STATIONS AND MULTIPLE VESSEL HOLDERS
- a vessel processing system for coating of a vessel comprising a first processing station, a second processing station, a vessel holder and a conveyor arrangement.
- the first processing station is configured for performing a first processing, for example an inspection or a coating, of an interior surface of the vessel.
- the second processing station is based from the first processing station and configured for performing a second processing, for example an inspection or a coating, of the interior surface of the vessel.
- the vessel holder comprises a vessel port configured to receive and seat an opening of the vessel for processing (inspecting and/or coating and/or inspecting) the interior surface of the seated vessel via the vessel port at the first processing station and at the second processing station.
- the conveyor arrangement is adapted for transporting the vessel holder and the seated vessel after the first processing from the first processing station to the second processing station for the second processing of the interior surface of the seated vessel at the second processing station.
- Vessels are broadly defined in this specification as including any type of vessel, including but not limited to sample tubes for collecting or storing blood, urine, or other samples, syringes for storing or delivering a biologically active compound or composition, vials for storing biological materials or biologically active compounds or compositions, catheters for transporting biological materials or biologically active compounds or compositions, and cuvettes for holding biological materials or biologically active compounds or compositions.
- a cuvette is a small tube of circular or square cross section, sealed at one end, made of plastic, glass, or fused quartz (for UV light) and designed to hold samples for spectroscopic experiments.
- the best cuvettes are as clear as possible, without impurities that might affect a spectroscopic reading.
- a cuvette may be open to the atmosphere on top or have a cap to seal it shut.
- the term "interior of the vessel” refers to the hollow space inside the vessel which can be used for storing blood or, according to another exemplary embodiment, a biologically active compound or composition.
- processing may comprise a coating step and/or an inspection step or a series of coating and inspection steps, for example an initial inspection step, followed by a coating step which is then followed by a second or even third or fourth inspection.
- the second, third and fourth inspection may be carried out simultaneously.
- the vessel holder comprises a vacuum duct for withdrawing a gas from an interior space of the seated vessel, wherein the vessel holder is adapted for maintaining a vacuum in the interior of the seated vessel, such that no additional vacuum chamber is necessary for processing the vessel.
- the vessel holder forms, together with the seated vessel, a vacuum chamber which is adapted for providing a vacuum in the interior space of the vessel.
- This vacuum is important for certain processing steps, such as plasma enhanced chemical vapour deposition (PECVD) or other chemical vapour deposition steps.
- PECVD plasma enhanced chemical vapour deposition
- the vacuum inside the vessel may be important for performing a certain inspection of the vessel wall, in particular the coating of the interior surface of the vessel wall, for example by measuring an outgas rate of the wall or an electric conductivity of the wall.
- the first processing is carried out during 30 seconds or less. Also, the second processing is carried out during 30 seconds or less.
- the first processing and/or second processing comprises an inspection of the interior surface of the vessel followed by a coating of the interior surface.
- the vessel holder comprises a gas inlet port for conveying a gas into the interior of the vessel.
- the system is adapted for automatically re-processing of the vessel in case a coating defect is detected.
- the vessel processing system and in particular the vessel holder may comprise an arrangement of different detectors, for example optical detectors, pressure probes, gas detectors, electrodes for electric measurements, etc.
- the vessel processing system for example one or more of the processing stations, comprises one or more grippers for transporting the vessel to the vessel holder and/or for removing the vessel from the vessel holder.
- the vessel holder comprises a gas inlet port for conveying a gas into the interior of the vessel.
- the vessel processing system is adapted for automatically re-processing of the vessel in case a coating defect is detected.
- the gas conveyed into the interior space of the vessel can be used for PECVD coating of the interior surface of the vessel.
- the first processing and/or the second processing comprises a coating of the interior surface of the vessel.
- the first processing station and/or second processing station comprises a PECVD apparatus for coating of the interior surface of the vessel.
- the system further comprises an outer electrode surrounding at least an upper part of the seated vessel.
- the vessel holder comprises an electrically conductive probe to provide a counter-electrode within the vessel.
- the first processing and/or second processing comprises an inspection of the interior surface of the vessel for defects.
- the system further comprises a first detector adapted for being inserted into the vessel via the vessel port of the first processing station and/or the second processing station for inspection of the interior surface of the vessel for defects.
- the vessel processing system further comprises a second detector located outside the vessel for inspection of the interior surface of the vessel for defects.
- the first detector and/or the second detector is mounted to the vessel holder.
- the vessel holder comprises a mould for forming the vessel.
- the vessel processing system may also be adapted for inspection of a vessel and may in particular be adapted for performing a first inspection of the vessel for defects, application of a first coating to the interior surface of the vessel, followed by second inspection of the interior surface of the coated vessel for defects. Furthermore, the system may be adapted for evaluation of the data acquired during the different inspections, wherein the second inspection and the data evaluation takes less than 30 seconds.
- a vessel processing system for coating and inspection of a vessel comprising a processing station arrangement which is configured for performing a first inspection of the vessel for defects, application of a first coating to the interior surface of the vessel, performing a second inspection of the interior surface of the coated vessel for defects and evaluating the data acquired during inspection, wherein the second inspection and the data evaluation takes less than 30 seconds.
- first or second processing The application of the first coating may also be referred to as first or second processing and the performing of the second inspection of the interior surface of the coated vessel may be referred to as second processing.
- the processing station arrangement comprises a first processing station for performing the first inspection, application of the first coating to the interior surface of the seated vessel and performing the second inspection. Furthermore, the processing station arrangement comprises a vessel holder which comprises a vessel port configured to receive and seat an opening of the vessel for inspecting and applying the first coating of the interior surface of the seated vessel via the vessel port at the first processing station.
- the processing station arrangement further comprises a second processing station spaced from the first processing station and configured for performing the second inspection, applying a second coating and performing a third inspection after the second coating.
- the vessel processing system comprises a conveyor arrangement for transporting the vessel holder and the seated vessel after application of the first coating from the first processing station to the second processing station for application of the second coating to the interior surface of the seated vessel at the second processing station.
- the vessel port of the vessel holder is configured to receive and seat the opening of the vessel for coating and inspecting the interior surface of the seated vessel via the vessel port at the first processing station and at the second processing station.
- the vessel holder comprises a vacuum duct for withdrawing a gas from an interior of the seated vessel, wherein the vessel holder is adapted for maintaining a vacuum in the interior of the seated vessel, such that no additional vacuum chamber is necessary for coating and inspecting the vessel.
- each inspection is carried out during 30 seconds or less.
- the vessel processing system is adapted for automatically re-processing of the vessel in case a coating defect is detected.
- the first processing station and/or the second processing station comprises a PECVD apparatus for application of the coating of the interior surface of the vessel.
- the first coating is a barrier coating, wherein the system is adapted for confirming whether a barrier layer is present or absent.
- the second coating is a lubricity coating, wherein the system is adapted for confirming whether the lubricity coating (i.e. the lubricity layer) is present or absent.
- the first coating is a barrier coating
- the second coating is a lubricity coating
- the system is adapted for confirming whether the barrier and the lubricity layer are present or absent.
- the system is adapted for confirming whether the barrier layer and the lubricity layer are present or absent to at least a six sigma level of certainty.
- the first inspection and/or the second inspection comprises at least one of measuring of an outgas rate of a gas from the coated vessel, performing an optical monitoring of the application of the coating, measuring optical parameters of the interior surface of the coated vessel, and measuring electrical properties of the coated vessel.
- the corresponding measurement data can then be analyzed by a processor.
- the processing system further comprises a first detector for measuring the outgas rate and/or a second detector for measuring the diffusion rate and/or a third detector for measuring the optical parameters and/or a fourth detector for measuring the electrical parameters.
- the first coating and/or the second coating is less than 100 nm thick.
- the vessel processing system further comprises a processor for evaluating data acquired during inspection.
- An aspect of the invention is a vessel processing system comprising a first processing station, a second processing station, a multiplicity of vessel holders, and a conveyor.
- the first processing station is configured for processing a vessel having an opening and a wall defining an interior surface.
- the second processing station is spaced from the first processing station and configured for processing a vessel having an opening and a wall defining an interior surface.
- At least some, optionally all, of the vessel holders include a vessel port configured to receive and seat the opening of a vessel for processing the interior surface of a seated vessel via the vessel port at the first processing station.
- the conveyor is configured for transporting a series of the vessel holders and seated vessels from the first processing station to the second processing station for processing the interior surface of a seated vessel via the vessel port at the second processing station.
- the portable vessel holder of the vessel processing system may be adapted for holding a vessel while an interior surface of the vessel is coated and inspected for defects and while the vessel is transported from a first processing station to a second processing station of the vessel processing system, the vessel holder comprising a vessel port configured to seat an opening of the vessel and for processing the interior surface of the seated vessel via the vessel port at the first processing station and at the second processing station.
- the portable vessel holder further comprises, according to another exemplary embodiment of the present invention, a second port for receiving an outside gas supply or vent and a duct for passing a gas between the opening of the vessel seated on the vessel port and the second port.
- the portable vessel holder weights less than 2.25 kg.
- the portable vessel holder further comprises a vacuum duct and an outside vacuum port for withdrawing a gas via the vessel port from an interior of the seated vessel, wherein the vessel holder is adapted for maintaining a vacuum in the interior of the seated vessel, such that no additional vacuum chamber is necessary for processing the vessel.
- the portable vessel holder further comprises a vacuum duct and an outside vacuum port for withdrawing a gas via the vessel port from an interior of the seated vessel, wherein the vessel holder is adapted for maintaining a vacuum in the interior of the seated vessel, such that no additional vacuum chamber is necessary for processing the vessel.
- the outside vacuum port also incorporates a gas inlet port, contained within the vacuum port for conveying gas into the interior of the seated vessel.
- the processing of the vessel comprises a coating of the interior surface of the seated vessel.
- the vessel holder is essentially made of thermoplastic material.
- the portable vessel holder further comprises a cylindrical inner surface for receiving a cylindrical wall of the vessel, a first annular groove in and coaxial with the cylindrical inner surface, and a first O-ring disposed in the first annular groove for providing a seal between the seated vessel in the vessel holder.
- the portable vessel holder further comprises a radially extending abutment adjacent to the round cylindrical inner surface against which the open end of the seated vessel can be butted.
- the portable vessel holder further comprises a second annular groove in and coaxial with the cylindrical inner surface and axially spaced from the first annular groove. Furthermore, the vessel holder comprises a second O-ring disposed in the second annular groove for providing a seal between the seated vessel in the vessel holder.
- the portable vessel holder further comprises a first detector for interrogating the interior space of the vessel via the vessel port for inspection of the interior surface of the seated vessel for defects.
- the portable vessel holder comprises a mould for forming the vessel.
- the vessel processing system for coating of a vessel comprises the above and below described vessel holder.
- the portable vessel holder includes a vessel port, a second port, a duct, and a conveyable housing.
- the vessel port is configured to seat a vessel opening in a mutually communicating relation.
- the second port is configured to receive an outside gas supply or vent.
- the duct is configured for passing one or more gases between a vessel opening seated on the vessel port and the second port.
- the vessel port, second port, and duct are attached in substantially rigid relation to the conveyable housing.
- the portable vessel holder weighs less than five pounds.
- FIG. 200 Another aspect of the invention is a portable vessel holder including a vessel port, a vacuum duct, a vacuum port, and a conveyable housing.
- the vessel port is configured to receive a vessel opening in a sealed, mutually communicating relation.
- the vacuum duct is configured for withdrawing a gas via the vessel port from a vessel seated on the vessel port.
- the vacuum port is configured for communicating between the vacuum duct and an outside source of vacuum.
- the source of vacuum can be a pump or a reservoir or ballast tank of lower pressure than the vacuum duct.
- the vessel port, vacuum duct, and vacuum port are attached in substantially rigid relation the conveyable housing.
- the portable vessel holder weighs less than five pounds.
- Still another aspect of the invention is a vessel holder for receiving an open end of a vessel having a substantially cylindrical wall adjacent to its open end.
- the vessel holder can have a generally cylindrical inner surface (for example a round cylindrical inner surface), an annular groove, and an O-ring. It will be understood throughout this specification that vessels specified as having round or circular openings or cross-sections are merely exemplary, and do not limit the scope of the disclosure or claims.
- the "round" cylindrical surface of the vessel holder can be non-round, and can be sealed using a non-round sealing element, such as a gasket or a seal shaped to seal to the non-round cross-section, except as otherwise specifically required.
- a non-round sealing element such as a gasket or a seal shaped to seal to the non-round cross-section, except as otherwise specifically required.
- “cylindrical” does not require a round- section cylinder, and encompasses other cross-sectional shapes, for example square with rounded corners.
- the generally cylindrical inner surface is sized for receiving the vessel cylindrical wall.
- the annular groove is disposed in and coaxial with the generally cylindrical inner surface.
- the first annular groove has an opening at the generally cylindrical inner surface and a bottom wall radially spaced from the generally cylindrical inner surface.
- the O-ring is disposed in the first annular groove.
- the O-ring is sized, in relation to the first annular groove, to normally extend radially through the opening and to be pressed radially outward by a vessel received by the generally cylindrical inner surface. This arrangement forms a seal between the vessel and the first annular groove.
- a method for coating and inspection of a vessel in which a first inspection of an interior surface of the vessel for defects is performed after which a coating to the interior surface of the vessel is applied. Then, a second inspection of the interior surface of the coated vessel for defects is performed, followed by an evaluation of the data acquired during the first and second inspection, wherein the second inspection and the data evaluation takes less than 30 seconds.
- a method for processing a vessel in which an opening of the vessel is seated on a vessel port of a vessel holder, after which an interior surface of the vessel is coated via the vessel port. Then, the coating is inspected for defects via the vessel port. After that, the vessel is transported from the first processing station to a second processing station, wherein the seated vessel is held during coating, inspection and transport by the vessel holder.
- a first processing station and a second processing station spaced from the first processing station are provided for processing vessels.
- a vessel is provided having an opening and a wall defining an interior surface.
- a vessel holder is provided comprising a vessel port. The opening of the vessel is seated on the vessel port. The interior surface of the seated vessel is processed via the vessel port at the first processing station. The vessel holder and seated vessel are transported from the first processing station to the second processing station. The interior surface of the seated vessel is then processed via the vessel port at the second processing station.
- a first processing device and a second processing device are provided for processing vessels.
- a vessel is provided having an opening and a wall defining an interior surface.
- a vessel holder is provided comprising a vessel port. The opening of the vessel is seated on the vessel port.
- the first processing device is moved into operative engagement with the vessel holder, or vice versa.
- the interior surface of the seated vessel is processed via the vessel port using the first processing device.
- the second processing device is then moved into operative engagement with the vessel holder, or vice versa.
- Yet another aspect of the invention is a method of plasma-enhanced chemical vapor deposition (PECVD) treatment of a first vessel, including several steps.
- a first vessel is provided having an open end, a closed end, and an interior surface.
- At least a first gripper is configured for selectively holding and releasing the closed end of the first vessel.
- the closed end of the first vessel is gripped with the first gripper and, using the first gripper, transported to the vicinity of a vessel holder configured for seating to the open end of the first vessel.
- the first gripper is then used to axially advance the first vessel and seat its open end on the vessel holder, establishing sealed communication between the vessel holder and the interior of the first vessel.
- At least one gaseous reactant is introduced within the first vessel through the vessel holder.
- Plasma is formed within the first vessel under conditions effective to form a reaction product of the reactant on the interior surface of the first vessel.
- the first vessel is then unseated from the vessel holder and, using the first gripper or another gripper, the first vessel is axially transported away from the vessel holder.
- the first vessel is then released from the gripper used to axially transport it away from the vessel holder.
- a Plasma Enhanced Chemical Vapour Deposition (PECVD) apparatus for coating an interior surface of a vessel.
- the PECVD apparatus may be part of the vessel processing system and comprises a vessel holder, such as the holder described above and below, which comprises a vessel port configured to receive and seat a first opening of the vessel for processing the interior surface of the seated vessel via the vessel port.
- the PECVD apparatus comprises an inner electrode for being arranged within an interior space of the seated vessel and an outer electrode having an interior portion for receiving the seated vessel.
- a power supply is provided to create a plasma within the vessel, wherein the seated vessel and the vessel holder are adapted for defining a plasma reaction chamber.
- the PECVD apparatus further comprises a source of vacuum for evacuating the interior space of the seated vessel, wherein the vessel port and the seated vessel are adapted for defining a vacuum chamber.
- the PECVD apparatus further comprises a gas feed for feeding a reactant gas from a reactant gas source into the interior space of the vessel.
- the gas feed is positioned at a distal portion of the inner electrode.
- the inner electrode is a probe having a distal portion positioned to extend concentrically into the seated vessel.
- the outer electrode has a cylindrical section and extends concentrically about the seated vessel.
- the PECVD apparatus further comprises a gripper for selectively holding and releasing a closed end of the vessel and, while gripping the close end of the vessel, for transporting the vessel to a vicinity of the vessel holder.
- the PECVD apparatus is adapted for forming a plasma in the interior space of the vessel that is substantially free of hollow cathode plasma.
- the PECVD apparatus further comprises a detector for interrogating the interior space of the vessel via the vessel port for inspection of the interior surface of the vessel for defects.
- the PECVD apparatus further comprises a processing vessel having a processing vessel opening for connection with a second, restricted opening of the vessel to allow a reactant gas to flow from the interior space of the vessel into the processing vessel.
- a distal end of the inner electrode is positioned less than half the distance to the second, restricted opening from the first, larger opening of the seated vessel.
- the distal end of the inner electrode is positioned outside the first, larger opening of the seated vessel.
- a method for coating an interior surface of a vessel in which an opening of the vessel is received and seated on a vessel port of a vessel holder for processing the interior surface of the seated vessel. Then, an inner electrode is arranged within an interior space of the seated vessel after which a gas feed is positioned at the distal portion of the inner electrode. Furthermore, the seated vessel is received in an interior portion of an outer electrode. The seated vessel in the vessel holder is adapted for defining a plasma reaction chamber.
- a vacuum chamber may be defined by the vessel port and the seated vessel and gas is drawn from the interior space of the seated vessel, such that no external vacuum chamber is necessary for coating.
- a plasma is formed in the interior space of the vessel and a coating material is deposited on the interior surface of the seated vessel.
- a processing vessel opening is connected with a restricted opening of the vessel to allow a reactant gas to flow from the interior space of the vessel into the processing vessel.
- FIG. 1 Another aspect of the invention is a PECVD apparatus comprising including a vessel holder, an inner electrode, an outer electrode, and a power supply.
- the vessel holder has a port to receive a vessel in a seated position for processing.
- the inner electrode is positioned to be received within a vessel seated on a vessel holder.
- the outer electrode has an interior portion positioned to receive a vessel seated on the vessel holder.
- the power supply feeds alternating current to the inner and outer electrodes to form plasma within a vessel seated on the vessel holder.
- the vessel defines a plasma reaction chamber.
- Even another aspect of the invention is a PECVD apparatus as described in the preceding paragraphs, in which a gas drain, not necessarily including a source of vacuum, is provided to transfer gas to or from the interior of a vessel seated on the port to define a closed chamber.
- a gas drain not necessarily including a source of vacuum
- Another aspect of the invention is an apparatus for PECVD treatment of a first vessel having an open end, a closed end, and an interior space.
- the apparatus includes a vessel holder, a first gripper, a seat on the vessel holder, a reactant supply, a plasma generator, and a vessel release.
- the vessel holder is configured for seating to the open end of a vessel.
- the first gripper is configured for selectively holding and releasing the closed end of a vessel and, while gripping the closed end of the vessel, transporting the vessel to the vicinity of the vessel holder.
- the vessel holder has a seat configured for establishing sealed communication between the vessel holder and the interior space of the first vessel.
- the reactant supply is operatively connected for introducing at least one gaseous reactant within the first vessel through the vessel holder.
- the plasma generator is configured for forming plasma within the first vessel under conditions effective to form a reaction product of the reactant on the interior surface of the first vessel.
- the vessel release is provided for unseating the first vessel from the vessel holder.
- a gripper which is the first gripper or another gripper is configured for axially transporting the first vessel away from the vessel holder and then releasing the first vessel.
- a method for coating (and/or inspecting) an interior surface of a vessel in which an opening of the vessel is received and seated on a vessel holder for processing the interior surface of the seated vessel.
- processing may refer to a coating step or several coating steps or even to a series of coating and inspection steps.
- a first processing of the interior surface of the seated vessel is performed via a vessel port of the vessel holder at a first processing station. Then, the vessel holder and the seated vessel are transported to a second processing station after the first processing at the first processing station. Then, at the second processing station, a second processing of the interior surface of the seated vessel is performed via the vessel port of the vessel holder.
- V.A. PECVD to apply SiO x barrier coating, using plasma that is substantially free of hollow cathode plasma
- Another aspect of the invention is a method of applying a barrier coating of SiO x , in which x in this formula is from about 1.5 to about 2.9, alternatively from about 1.5 to about 2.6, alternatively about 2, on a surface, preferably on the interior of a vessel.
- the method includes several steps.
- a surface e.g. a vessel wall is provided, as is a reaction mixture comprising plasma forming gas, i.e. an organosilicon compound gas, optionally an oxidizing gas, and optionally a hydrocarbon gas.
- plasma forming gas i.e. an organosilicon compound gas, optionally an oxidizing gas, and optionally a hydrocarbon gas.
- Plasma is formed in the reaction mixture that is substantially free of hollow cathode plasma.
- the vessel wall is contacted with the reaction mixture, and the coating of SiO x is deposited on at least a portion of the vessel wall.
- Another aspect of the invention is a method for coating an inner surface of a restricted opening of a generally tubular vessel to be processed by PECVD. The method includes these steps.
- a generally tubular vessel is provided to be processed.
- the vessel includes an outer surface, an inner surface defining a lumen, a larger opening having an inner diameter, and a restricted opening that is defined by an inner surface and has an inner diameter smaller than the larger opening inner diameter.
- a processing vessel having a lumen and a processing vessel opening.
- the processing vessel opening is connected with the restricted opening of the vessel to establish communication between the lumen of the vessel to be processed and the processing vessel lumen via the restricted opening.
- At least a partial vacuum is drawn within the lumen of the vessel to be processed and the processing vessel lumen.
- a PECVD reactant is flowed through the first opening, then through the lumen of the vessel to be processed, then through the restricted opening, then into the processing vessel lumen.
- Plasma is generated adjacent to the restricted opening under conditions effective to deposit a coating of a PECVD reaction product on the inner surface of the restricted opening.
- Still another aspect of the invention is a method of applying a lubricity coating on a substrate. The method is carried out as follows.
- a precursor is provided.
- the precursor preferably is an organosilicon compound, more preferably a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, or a combination of any two or more of these precursors.
- Other precursors e.g., organometallic precursors containing metals of Group III and IV of the periodic system, are also contemplated.
- the precursor is applied to a substrate under conditions effective to form a coating.
- the coating is polymerized or crosslinked, or both, to form a lubricated surface having a lower "plunger sliding force" or "breakout force,” as defined in this specification, than the untreated substrate.
- Even another aspect of the invention is a vessel processing method for processing a plastic vessel having an opening and a wall defining an interior surface. The method is carried out by inspecting the interior surface of the vessel as provided for defects; applying a coating to the interior surface of the vessel after inspecting the vessel as provided; and inspecting the coating for defects.
- Another aspect of the invention is a vessel processing method in which a barrier coating is applied to the vessel after inspecting the vessel as molded, and the interior surface of the vessel is inspected for defects after applying the barrier coating.
- VLB Vessel Inspection By Detecting Outgassing Of Container Wall, e.g. Through Barrier Layer
- Another aspect of the invention is a method for inspecting a coating by measuring a volatile species outgassed by the coated article ("Outgassing method").
- Said method can be used for inspecting the product of a coating process wherein a coating has been applied to the surface of a substrate to form a coated surface.
- the method can be used as an inline process control for a coating process in order to identify and eliminate coated products not meeting a predetermined standard or damaged coating products.
- the "volatile species” is a gas or vapor at test conditions, preferably is selected from the group consisting of air, nitrogen, oxygen, water vapor, volatile coating components, volatile substrate components, and a combination thereof, more preferably is air, nitrogen, oxygen, water vapor, or a combination thereof.
- the method may be used to measure just one or a few volatile species, bur preferably a plurality of different volatile species is measured in step (c), and more preferably substantially all the volatile species released from the inspection object are measured in step (c).
- the outgassing method comprises the steps: (a) providing the product as inspection object;
- step (d) comparing the result of step (c) with the result of step (c) for at least one reference object measured under the same test conditions, thus determining the presence or absence of the coating, and/or a physical and/or chemical property of the coating.
- the physical and/or chemical property of the coating to be determined may be selected from the group consisting of its barrier effect, its wetting tension, and its composition, and preferably is its barrier effect.
- step (c) is performed by measuring the mass flow rate or volume flow rate of the at least one volatile species in the gas space adjacent to the coated surface.
- the reference object (i) is an uncoated substrate; or (ii) is a substrate coated with a reference coating. This depends on, e.g., whether the outgassing method is used to determine the presence or absence of a coating (then the reference object may be an uncoated substrate) or to determine the properties of the coating, e.g. in comparison to a coating with known properties. For determining the coating ' s identity with a specific coating, a reference coating will also be a typical choice.
- the outgassing method may also comprise as an additional step between steps (a) and (c) the step of (b) changing the atmospheric pressure in the gas space adjacent to the coated surface such that a pressure differential through the coated surface is provided and a higher mass flow rate or volume flow rate of the volatile species may be realized than without the pressure differential.
- the volatile species will migrate into the direction of the lower side of the pressure differential.
- the coated object is a vessel
- the pressure differential is established between the vessel lumen and the exterior in order to measure the outgassing of the volatile species from the coated vessel wall.
- the pressure differential may e.g. be provided by at least partially evacuating the gas space in the vessel. In this case, the volatile species may be measured which is outgassed into the lumen of the vessel.
- the measurement may be performed by using a measurement cell interposed between the coated surface of the substrate and a source of vacuum.
- the inspection object may be contacted with a volatile species in step (a), preferably a volatile species selected from the group consisting of air, nitrogen, oxygen, water vapor, and a combination thereof, preferably in order to allow the adsorption or absorption of said volatile species onto or into the material of the inspection object. Then, the subsequent release of said volatile species from the inspection object is measured in step (c).
- a volatile species selected from the group consisting of air, nitrogen, oxygen, water vapor, and a combination thereof
- the substrate may be a polymeric compound, preferably is a polyester, a polyolefin, a cyclic olefin copolymer, a polycarbonate, or a combination of these.
- the coating characterized by the outgassing method is typically a coating prepared by PECVD from, e.g., an organosilicon precursor as decribed herein.
- the coating is a barrier coating, preferably is a SiO x layer wherein x is from about 1.5 to about 2.9; and/or (ii) the coating is a coating modifying the lubricity and/or surface tension of the coated substrate, preferably is a layer of Si w 0 ⁇ C y H z , where w is 1 , x is from about 0.5 to 2.4, y is from about 0.6 to about 3, and z is from 2 to about 9.
- the subsequent outgassing measurement may even be conducted without breaking the vacuum used for PECVD.
- the volatile species measured may be a volatile species released from the coating, a volatile species release form the substrate, or a combination of both.
- the volatile species is a volatile species released from the coating, preferably is a volatile coating component, and the inspection is performed to determine the presence, the properties and/or the composition of the coating.
- the volatile species is a volatile species released from the substrate and the inspection is performed to determine the presence of the coating and/or the barrier effect of the coating.
- the outgassing method of the present invention is particularly suitable to determine the presence and characteristics of a coating on a vessel wall.
- the coated substrate may be a vessel having a wall which is at least partially coated on its inner or outer surface during the coating process.
- the coating is disposed on the inner surface of the vessel wall.
- the conditions effective to distinguish the presence or absence of the coating, and/or to determine a physical and/or chemical property of the coating may include a test duration of less than one hour, or less than one minute, or less than 50 seconds, or less than 40 seconds, or less than 30 seconds, or less than 20 seconds, or less than 15 seconds, or less than 10 seconds, or less than 8 seconds, or less than 6 seconds, or less than 4 seconds, or less than 3 seconds, or less than 2 seconds, or less than 1 second.
- the release rate of the volatile species may be modified by modifying the ambient pressure and/or temperature, and/or humidity.
- the outgassing is measured using a microcantilever measurement technique.
- the measuring may be carried out by
- An apparatus for performing the outgassing method is also considered, for example an apparatus comprising a microcantilever as described above.
- a barrier layer on a material that outgasses a vapor can be inspected, wherein the inspection method has several steps.
- a sample of material that outgasses a gas and has at least a partial barrier layer is provided.
- a pressure differential is provided across the barrier layer, such that at least some of the material that outgasses is on the higher-pressure side of the barrier layer.
- the outgassed gas passing through the barrier layer is measured. If a pressure differential is present, the measurement optionally is performed on the lower-pressure side of the barrier layer.
- Another aspect of the invention is a hydrophobic coating deposited from an organosilicon precursor, e.g. in a vessel having a hydrophobic coating on the inside wall.
- the coating is of the type made by the following steps.
- a precursor is provided, which is an organometallic compound, preferably an organosilicon compound, more preferably a compound selected from the group consisting of a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, an alkyl trimethoxysilane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, or a combination of any two or more of these precursors.
- organometallic compounds containing a metal of Group III or IV may be considered as precursors.
- the precursor is applied to a substrate under conditions effective to form a coating.
- the coating is polymerized or crosslinked, or both, to form a hydrophobic surface having a higher contact angle than the untreated substrate.
- the resulting coating may have the sum formula: SiwOxCyHz, where w is 1 , x is from about 0.5 to about 2.4, y is from about 0.6 to about 3, and z is from about 2 to about 9, preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9.
- w, x, y, and z used throughout this specification should be understood as ratios in an empirical formula (e.g. for a coating), rather than as a limit on the number of atoms in a molecule.
- octamethylcyclotetrasiloxane which has the molecular formula Si4O4C8H24
- empirical formula arrived at by dividing each of w, x, y, and z in the molecular formula by 4, the largest common factor: SM O1 C2H6.
- the values of w, x, y, and z are also not limited to integers.
- (acyclic) octamethyltrisiloxane, molecular formula Si3O2C8H24 is reducible to Si1 O0.67C2.67H8.
- Another aspect of the invention is a cell preparation tube having a wall provided with a hydrophobic coating and containing an aqueous sodium citrate reagent.
- the wall is made of thermoplastic material having an internal surface defining a lumen.
- the hydrophobic coating is provided on the internal surface of the tube.
- the hydrophobic coating is made by providing an organometallic compound, preferably an organosilicon compound, more preferably a compound selected from the group consisting of a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, an alkyl trimethoxysilane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, or a combination of any two or more of these precursors.
- PECVD is used to form a coating on the internal surface.
- the resulting coating may have the structure: Si w 0 ⁇ C y H z , where w is 1 , x is from about 0.5 to about 2.4, y is from about 0.6 to about 3, and z is from about 2 to about 9, preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9.
- the aqueous sodium citrate reagent is disposed in the lumen of the tube in an amount effective to inhibit coagulation of blood introduced into the tube.
- Another aspect of the invention is a vessel having a wall at least partially enclosing a lumen.
- the wall has an interior polymer layer enclosed by an exterior polymer layer.
- One of the polymer layers is a layer at least 0.1 mm thick of a cyclic olefin copolymer (COC) resin defining a water vapor barrier.
- Another of the polymer layers is a layer at least 0.1 mm thick of a polyester resin.
- the wall includes an oxygen barrier layer of SiO x , in which x in this formula is from about 1.5 to about 2.9, alternatively from about 1.5 to about 2.6, alternatively about 2, having a thickness of from about 10 to about 500 angstroms.
- Another aspect of the invention is a method of making a vessel having a wall having an interior polymer layer enclosed by an exterior polymer layer, one layer made of COC and the other made of polyester.
- the vessel is made by a process including introducing COC and polyester resin layers into an injection mold through concentric injection nozzles.
- An optional additional step is applying an amorphous carbon coating to the vessel by PECVD, as an inside coating, and outside coating, or as an interlayer coating located between the layers.
- An optional additional step is applying an SiO x barrier layer to the inside of the vessel wall, where SiO x is defined as before.
- Another optional additional step is post- treating the SiO x layer with a process gas consisting essentially of oxygen and essentially free of a volatile silicon compound.
- the SiO x coating can be formed at least partially from a silazane feed gas.
- FIG. 1 Another aspect of the invention is a vessel including a vessel, a barrier coating, and a closure.
- the vessel is generally tubular and made of thermoplastic material.
- the vessel has a mouth and a lumen bounded at least in part by a wall having an inner surface interfacing with the lumen.
- a closure covers the mouth and isolates the lumen of the vessel from ambient air.
- a related aspect of the invention is a vessel as described in the previous paragraph, in which the barrier coating is made of soda lime glass or borosilicate glass, or another type of glass.
- Another aspect of the invention is a method of applying a coating, for example a lubricity coating as defined above, on an elastomeric stopper.
- a stopper is located in a substantially evacuated chamber.
- a reaction mixture is provided including plasma forming gas, i.e. an organosilicon compound gas, optionally an oxidizing gas, and optionally a hydrocarbon gas. Plasma is formed in the reaction mixture, which is contacted with the stopper.
- a lubricity coating e.g.
- a coating of Si w 0 ⁇ C y H z preferably where w is 1 , x in this formula is from about 0.5 to 2.4, y is from about 0.6 to about 3, and z is from 2 to about 9, preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9, is deposited on at least a portion of the stopper.
- Another aspect of the invention is a method of applying a coating of a composition including carbon and one or more elements of Groups III or IV on an elastomeric stopper.
- a stopper is located in a deposition chamber.
- a reaction mixture is provided in the deposition chamber, including a plasma forming gas with a gaseous source of a Group III element (e.g. Al), a Group IV element (e.g. Si, Sn), or a combination of two or more of these.
- the reaction mixture optionally contains an oxidizing gas and optionally contains a gaseous compound having one or more C-H bonds.
- Plasma is formed in the reaction mixture, and the stopper is contacted with the reaction mixture.
- a coating of a Group III element or compound, a Group IV element or compound, or a combination of two or more of these is deposited on at least a portion of the stopper.
- FIG. 1 Another aspect of the invention is a vessel including a vessel, a barrier coating, and a closure.
- the vessel is generally tubular and made of thermoplastic material.
- the vessel has a mouth and a lumen bounded at least in part by a wall.
- the wall has an inner surface interfacing with the lumen.
- An at least essentially continuous barrier coating is applied on the inner surface of the wall.
- the barrier coating is effective to maintain within the vessel at least 90% of its initial vacuum level, optionally 95% of its initial vacuum level, for a shelf life of at least 24 months.
- a closure is provided covering the mouth of the vessel and isolating the lumen of the vessel from ambient air.
- Still another aspect of the invention is a vessel having a lubricity coating made from an organosilicon precursor.
- a different organometallic precursor as defined herein may also be contemplated.
- the coating can be of the type made by the following process.
- a precursor is provided which is an organometallic precursor, preferably an organosilicon precursor, more preferably a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, or a combination of any two or more of these precursors.
- organometallic precursor preferably an organosilicon precursor, more preferably a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, or a combination of any two or more of these precursors.
- the precursor is applied to a substrate under conditions effective to form a coating.
- the coating is polymerized or crosslinked, or both, to form a lubricated surface having a lower plunger sliding force or breakout force than the untreated substrate.
- FIG. 300 Another aspect of the invention is a syringe including a plunger, a syringe barrel, and a lubricity layer.
- the syringe barrel has an interior surface slidably receiving the plunger.
- the lubricity layer is disposed on the interior surface of the syringe barrel and includes a coating of an Si w 0 ⁇ C y H z lubricity layer made from an organosilicon precursor as defined in this specification.
- the lubricity layer is less than 1000 nm thick and effective to reduce the breakout force or the plunger sliding force necessary to move the plunger within the barrel.
- Another aspect of the invention is a lubricity coating on the inner wall of a syringe barrel.
- the coating is produced from a PECVD process using the following materials and conditions.
- a cyclic precursor is employed, selected from a monocyclic siloxane, a polycyclic siloxane, or a combination of two or more of these. At least essentially no oxygen is added to the process.
- a sufficient plasma generation power input is provided to induce coating formation.
- the materials and conditions employed are effective to reduce the syringe plunger sliding force or breakout force moving through the syringe barrel by at least 25 percent relative to an uncoated syringe barrel.
- the resulting coating may have the formula: Si w 0 ⁇ C y H z , where w is 1 , x is from about 0.5 to about 2.4, y is from about 0.6 to about 3, and z is from about 2 to about 9, preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9.
- Lubricity Coating SiO x Barrier, Lubricity Layer, Surface treatment.
- a syringe comprising a barrel defining a lumen and having an interior surface slidably receiving a plunger.
- the syringe barrel may be made of thermoplastic base material.
- a lubricity coating is applied to, e.g., the barrel interior surface, the plunger, or both by PECVD.
- the lubricity coating may be made from an organosilicon precursor, and may be less than 1000 nm thick.
- a surface treatment is carried out on the lubricity coating in an amount effective to reduce leaching of the lubricity coating, the thermoplastic base material, or both into the lumen, i.e. effective to form a solute retainer on the surface.
- the lubricity coating and solute retainer are composed, and present in relative amounts, effective to provide a breakout force, plunger sliding force, or both that is less than the corresponding force required in the absence of the lubricity coating and solute retainer.
- Still another aspect of the invention is a syringe barrel including a plunger, a barrel, and interior and exterior barrier coatings.
- the barrel is made of thermoplastic base material defining a lumen.
- the barrel has an interior surface slidably receiving the plunger and an exterior surface.
- a barrier coating of SiO x in which x in this formula is from about 1.5 to about 2.9, alternatively from about 1.5 to about 2.6, alternatively about 2, is provided on the interior surface of the barrel.
- a barrier coating of a resin is provided on the exterior surface of the barrel.
- Even another aspect of the invention is a method of making a syringe including a plunger, a barrel, and interior and exterior barrier coatings.
- a barrel is provided having an interior surface for slidably receiving the plunger and an exterior surface.
- a barrier coating of SiO x in which x in this formula is from about 1.5 to about 2.9, alternatively from about 1.5 to about 2.6, alternatively about 2, is provided on the interior surface of the barrel by PECVD.
- a barrier coating of a resin is provided on the exterior surface of the barrel.
- a plunger for a syringe including a piston and a push rod.
- the piston has a front face, a generally cylindrical side face, and a back portion, the side face being configured to movably seat within a syringe barrel.
- the front face has a barrier coating.
- the push rod engages the back portion and is configured for advancing the piston in a syringe barrel.
- Yet another aspect of the invention is a plunger for a syringe, including a piston, a lubricity coating, and a push rod.
- the piston has a front face, a generally cylindrical side face, and a back portion.
- the side face is configured to movably seat within a syringe barrel.
- the lubricity coating interfaces with the side face.
- the push rod engages the back portion of the piston and is configured for advancing the piston in a syringe barrel.
- a syringe including a plunger, a syringe barrel, and a Luer fitting.
- the syringe barrel includes an interior surface slidably receiving the plunger.
- the Luer fitting includes a Luer taper having an internal passage defined by an internal surface.
- the Luer fitting is formed as a separate piece from the syringe barrel and joined to the syringe barrel by a coupling.
- the internal passage of the Luer taper has a barrier coating of SiO x , in which x in this formula is from about 1.5 to about 2.9, alternatively from about 1.5 to about 2.6, alternatively about 2.
- Still another aspect of the invention is a lubricity coating made from an organosilicon precursor.
- This coating is of the type made by the following process.
- a precursor is provided selected from an organometallic precursor, preferably an organosilicon precursor, preferably a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, or a combination of any two or more of these precursors.
- the precursor is applied to a substrate under conditions effective to form a coating.
- the coating is polymerized or crosslinked, or both, to form a lubricated surface having a lower plunger sliding force or breakout force than the untreated substrate.
- the resulting coating may have the structure: Si w 0 ⁇ C y H z , where w is 1 , x is from about 0.5 to about 2.4, y is from about 0.6 to about 3, and z is from about 2 to about 9, preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9. VII.B.4.b. Product by Process and Analytical Properties
- PECVD from an organometallic precursor, preferably from an organosilicon precursor, more preferably from a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, or a combination of any two or more of these precursors.
- the coating has a density between 1.25 and 1.65 g/cm 3 as determined by X-ray reflectivity (XRR).
- organometallic precursor containing a metal of Group III, i.e. Boron, Aluminum, Gallium, Indium, Thallium, Scandium, Yttrium, or Lanthanum, or Group IV, i.e. Silicon, Germanium, Tin, Lead, Titanium, Zirconium, Hafnium, Thorium, or combinations of any two or more of these, may also be contemplated. Other volatile organic compounds may also be contemplated. However, organosilicon compounds are preferred for performing present invention.
- a metal of Group III i.e. Boron, Aluminum, Gallium, Indium, Thallium, Scandium, Yttrium, or Lanthanum
- Group IV i.e. Silicon, Germanium, Tin, Lead, Titanium, Zirconium, Hafnium, Thorium, or combinations of any two or more of these, may also be contemplated.
- Other volatile organic compounds may also be contemplated.
- organosilicon compounds are preferred for performing present invention.
- Still another aspect of the invention is a lubricity coating deposited by
- PECVD from a feed gas comprising an organometallic precursor, preferably an organosilicon precursor, more preferably a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, or a combination of any two or more of these precursors.
- organometallic precursor preferably an organosilicon precursor, more preferably a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, or a combination of any two or more of these precursors.
- organometallic precursor preferably an organosilicon precursor, more preferably
- the coating has as an outgas component one or more oligomers containing repeating -(Me) 2 SiO- moieties, as determined by gas chromatography / mass spectrometry.
- the coating meets the limitations of any of embodiments VII.B.4.a or VII.B.4.b.
- Yet another aspect of the invention is a lubricity coating deposited by PECVD from a feed gas comprising an organometallic precursor, preferably an organosilicon precursor, more preferably a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, or a combination of any two or more of these precursors.
- the coating has atomic concentrations normalized to 100% carbon, oxygen, and silicon, as determined by X-ray photoelectron spectroscopy (XPS), of less than 50% carbon and more than 25% silicon.
- XPS X-ray photoelectron spectroscopy
- the coating meets the limitations of any of embodiments VII. B.4. a or VII. B.4. b.
- Another aspect of the invention is a lubricity coating deposited by PECVD from a feed gas comprising an organosilicon precursor, preferably a monocyclic siloxane, a monocyclic silazane, a polycyclic siloxane, a polycyclic silazane, or any combination of two or more of these.
- the coating has an atomic concentration of carbon, normalized to 100% of carbon, oxygen, and silicon, as determined by X-ray photoelectron spectroscopy (XPS), greater than the atomic concentration of carbon in the atomic formula for the feed gas.
- XPS X-ray photoelectron spectroscopy
- the coating meets the limitations of embodiments VII.BAa or VII.BAb.
- An additional aspect of the invention is a lubricity coating deposited by PECVD from a feed gas comprising an organosilicon precursor, preferably a monocyclic siloxane, a monocyclic silazane, a polycyclic siloxane, a polycyclic silazane, or any combination of two or more of these.
- the coating has an atomic concentration of silicon, normalized to 100% of carbon, oxygen, and silicon, as determined by X-ray photoelectron spectroscopy (XPS), less than the atomic concentration of silicon in the atomic formula for the feed gas.
- XPS X-ray photoelectron spectroscopy
- the coating meets the limitations of embodiments VII.BAa or VII.BAb.
- Even another aspect of the invention is a blood containing vessel.
- the vessel has a wall; the wall has an inner surface defining a lumen.
- the inner surface of the wall has an at least partial hydrophobic coating as defined above, preferably a hydrophobic coating of Si w O x CyH z , preferably where w is 1 , x in this formula is from about 0.5 to 2.4, y is from about 0.6 to about 3, and z is from 2 to about 9, more preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9.
- the coating can be as thin as monomolecular thickness or as thick as about 1000 nm.
- the vessel contains blood viable for return to the vascular system of a patient disposed within the lumen in contact with the Si w O x CyH z coating.
- Another aspect of the invention is a vessel having a wall.
- the wall has an inner surface defining a lumen and has an at least partial passivating, e.g. hydrophobic coating made from an organosilicon precursor by PECVD, preferably a coating of SiwOxCyHz, preferably where w is 1 , x in this formula is from about 0.5 to 2.4, y is from about 0.6 to about 3, and z is from 2 to about 9, more preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9.
- the thickness of the coating is from monomolecular thickness to about 1000 nm thick on the inner surface.
- the coating is effective to reduce the platelet activation of blood plasma treated with a sodium citrate additive and exposed to the inner surface, compared to the same type of wall uncoated.
- the coating is effective to reduce the clotting of blood exposed to the inner surface, compared to the same type of wall uncoated.
- Another aspect of the invention is a blood containing vessel having a wall having an inner surface defining a lumen.
- the inner surface has an at least partial coating of a composition including carbon, one or more metals of Group III, one or more metals of Group IV, or a combination of two or more of these.
- the thickness of the coating is between monomolecular thickness and about 1000 nm thick, inclusive, on the inner surface.
- the vessel contains blood viable for return to the vascular system of a patient disposed within the lumen in contact with the coating. VII.C.4. Coating of Group III or IV Element Reduces Clotting Or Platelet Activation of Blood in the Vessel
- the coating of the Group III or IV Element is effective to reduce the clotting or platelet activation of blood exposed to the inner surface of the vessel wall.
- Another aspect of the invention is an insulin containing vessel including a wall having an inner surface defining a lumen.
- the inner surface has an at least partial passivating coating made from an organosilicon precursor by PECVD, preferably a coating of Si w O x CyH z , preferably where w is 1 , x in this formula is from about 0.5 to 2.4, y is from about 0.6 to about 3, and z is from 2 to about 9, more preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9.
- the coating can be from monomolecular thickness to about 1000 nm thick on the inner surface. Insulin is disposed within the lumen in contact with the Si w O x CyH z coating.
- the coating of Si w O x CyH z is effective to reduce the formation of a precipitate from insulin contacting the inner surface, compared to the same surface absent the coating of Si w O x CyH z .
- Another aspect of the invention is an insulin containing vessel including a wall having an inner surface defining a lumen.
- the inner surface has an at least partial coating of a composition comprising carbon, one or more elements of Group III, one or more elements of Group IV, or a combination of two or more of these.
- the coating can be from monomolecular thickness to about 1000 nm thick on the inner surface. Insulin is disposed within the lumen in contact with the coating. VII.D.4. Coating of Group III or IV Element Reduces Precipitation of Insulin in the Vessel
- the coating of a composition comprising carbon, one or more elements of Group III, one or more elements of Group IV, or a combination of two or more of these is effective to reduce the formation of a precipitate from insulin contacting the inner surface, compared to the same surface absent the coating.
- a cuvette is a small tube of circular or square cross section, sealed at one end, made of plastic, glass, or fused quartz (for UV light) and designed to hold samples for spectroscopic experiments.
- the best cuvettes are as clear as possible, without impurities that might affect a spectroscopic reading.
- a cuvette may be open to the atmosphere or have a cap to seal it shut.
- the PECVD-applied coatings of the present invention can be very thin, transparent, and optically flat, thus not interfering with optical testing of the cuvette or its contents.
- a vial is a small vessel or bottle, especially used to store medication as liquids, powders or lyophilized powders. They can also be sample vessels e.g. for use in autosampler devices in analytical chromatography.
- a vial can have a tubular shape or a bottle-like shape with a neck. The bottom is usually flat unlike test tubes or sample collection tubes which usually have a rounded bottom. Vials can be made, for example, of plastic (e.g. polypropylene, COC, COP).
- a computer-readable medium in which a computer program for coating and/or inspection of a vessel is stored which, when being executed by a processor of a vessel processing system, causes the processor to perform the above or below mentioned method steps.
- a program element for coating and/or inspection of a vessel which, when being executed by a processor of a vessel processing system, causes the processor to carry out the above or below mentioned method steps.
- FIG. 1 is a schematic diagram showing a vessel processing system according to an embodiment of the disclosure.
- FIG. 2 is a schematic sectional view of a vessel holder in a coating station according to an embodiment of the disclosure.
- FIG. 3 is a view similar to FIG. 2 of an alternative embodiment of the disclosure.
- FIG. 4 is a diagrammatic plan view of an alternative embodiment of the vessel holder.
- FIG. 5 is a diagrammatic plan view of another alternative embodiment of the vessel holder.
- FIG. 6 is a view similar to FIG. 2 of vessel inspection apparatus.
- FIG. 7 is a view similar to FIG. 2 of alternative vessel inspection apparatus.
- FIG. 8 is a section taken along section lines A — A of FIG. 2.
- FIG. 9 is an alternative embodiment of the structure shown in FIG. 8.
- FIG. 10 is a view similar to FIG. 2 of a vessel holder in a coating station according to another embodiment of the disclosure, employing a CCD detector.
- FIG. 1 1 is a detail view similar to FIG. 10 of a light source and detector that are reversed compared to the corresponding parts of FIG. 6.
- FIG. 12 is a view similar to FIG. 2 of a vessel holder in a coating station according to still another embodiment of the disclosure, employing microwave energy to generate the plasma.
- FIG. 13 is a view similar to FIG. 2 of a vessel holder in a coating station according to yet another embodiment of the disclosure, in which the vessel can be seated on the vessel holder at the process station.
- FIG. 14 is a view similar to FIG. 2 of a vessel holder in a coating station according to even another embodiment of the disclosure, in which the electrode can be configured as a coil.
- FIG. 15 is a view similar to FIG. 2 of a vessel holder in a coating station according to another embodiment of the disclosure, employing a tube transport to move a vessel to and from the coating station.
- FIG. 16 is a diagrammatic view of the operation of a vessel transport system, such as the one shown in FIG. 15, to place and hold a vessel in a process station.
- FIG. 17 is a diagrammatic view of a mold and mold cavity for forming a vessel according to an aspect of the present disclosure.
- FIG. 18 is a diagrammatic view of the mold cavity of FIG. 17 provided with a vessel coating device according to an aspect of the present disclosure.
- FIG. 19 is a view similar to FIG. 17 provided with an alternative vessel coating device according to an aspect of the present disclosure.
- FIG. 20 is an exploded longitudinal sectional view of a syringe and cap adapted for use as a prefilled syringe.
- FIG. 21 is a view generally similar to FIG. 2 showing a capped syringe barrel and vessel holder in a coating station according to an embodiment of the disclosure.
- FIG. 22 is a view generally similar to FIG. 21 showing an uncapped syringe barrel and vessel holder in a coating station according to yet another embodiment of the invention.
- FIG. 23 is a perspective view of a blood collection tube assembly having a closure according to still another embodiment of the invention.
- FIG. 24 is a fragmentary section of the blood collection tube and closure assembly of FIG. 23.
- FIG. 25 is an isolated section of an elastomeric insert of the closure of FIGS. 23 and 24.
- FIG. 26 is a view similar to FIG. 22 of another embodiment of the invention for processing syringe barrels and other vessels.
- FIG. 27 is an enlarged detail view of the processing vessel of FIG. 26.
- FIG. 28 is a schematic view of an alternative processing vessel.
- FIG. 29 is a schematic view showing outgassing of a material through a coating.
- FIG. 30 is a schematic sectional view of a test set-up for causing outgassing of the wall of a vessel to the interior of the vessel and measurement of the outgassing using a measurement cell interposed between the vessel and a source of vacuum.
- FIG. 31 is a plot of outgassing mass flow rate measured on the test-set-up of FIG. 30 for multiple vessels.
- FIG. 32 is a bar graph showing a statistical analysis of the endpoint data shown in FIG. 31.
- FIG. 33 is a longitudinal section of a combined syringe barrel and gas receiving volume according to another embodiment of the invention.
- FIG. 34 is a view similar to FIG 34 of another embodiment of the invention including an electrode extension.
- FIG. 35 is a view taken from section lines 35 - 35 of FIG. 34, showing the distal gas supply openings and extension electrode of FIG. 34.
- FIG. 36 is a perspective view of a double-walled blood collection tube assembly according to still another embodiment of the invention.
- FIG. 37 is a view similar to FIG. 22 showing another embodiment.
- FIG. 38 is a view similar to FIG. 22 showing still another embodiment.
- FIG. 39 is a view similar to FIG. 22 showing yet another embodiment.
- FIG. 40 is a view similar to FIG. 22 showing even another embodiment.
- FIG. 41 is a plan view of the embodiment of FIG. 40.
- FIG. 42 is a fragmentary detail longitudinal section of an alternative sealing arrangement, usable for example, with the embodiments of FIGS. 1 , 2, 3, 6-10, 12- 16, 18, 19, 33, and 37-41 for seating a vessel on a vessel holder.
- FIG. 42 also shows an alternative syringe barrel construction usable, for example, with the embodiments of FIGS. 2, 3, 6-10, 12-22, 26-28, 33- 34, and 37-41.
- FIG. 43 is a further enlarged detail view of the sealing arrangement shown in FIG. 42.
- FIG. 44 is a view similar to FIG. 2 of an alternative gas delivery tube/inner electrode usable, for example with the embodiments of FIGS. 1 , 2, 3, 8, 9, 12-16, 18-19, 21 -22, 33, 37-43, 46-49, and 52-54.
- FIG. 45 is an alternative construction for a vessel holder usable, for example, with the embodiments of FIGS. 1 , 2, 3, 6-10, 12-16, 18, 19, 21 , 22, 26, 28, 33-35, and 37-44.
- FIG. 46 is a schematic sectional view of an array of gas delivery tubes and a mechanism for inserting and removing the gas delivery tubes from a vessel holder, showing a gas delivery tube in its fully advanced position.
- FIG. 47 is a view similar to FIG. 46, showing a gas delivery tube in an intermediate position.
- FIG. 48 is a view similar to FIG. 46, showing a gas delivery tube in a retracted position.
- the array of gas delivery tubes of FIGS. 46-48 are usable, for example, with the embodiments of FIGS. 1 , 2, 3, 8, 9, 12-16, 18-19, 21 -22, 26-28, 33-35, 37-45, 49, and 52-54.
- the mechanism of FIGS. 46-48 is usable, for example, with the gas delivery tube embodiments of FIGS. 2, 3, 8, 9, 12-16, 18-19, 21 -22, 26-28, 33-35, 37-45, 49, and 52-54, as well as with the probes of the vessel inspection apparatus of FIGS. 6 and 7.
- FIG. 49 is a view similar to FIG. 16 showing a mechanism for delivering vessels to be treated and a cleaning reactor to a PECVD coating apparatus.
- the mechanism of FIG. 49 is usable with the vessel inspection apparatus of FIGS. 1 , 9, 15, and 16, for example.
- FIG. 50 is an exploded view of a two-piece syringe barrel and Luer lock fitting.
- the syringe barrel is usable with the vessel treatment and inspection apparatus of FIGS. 1 -22, 26-28, 33-35, 37-39, 44, and 53-54.
- FIG. 51 is an assembled view of the two-piece syringe barrel and Luer lock fitting of FIG. 50.
- FIG. 52 is a view similar to FIG. 42 showing a syringe barrel being treated that has no flange or finger stops 440.
- the syringe barrel is usable with the vessel treatment and inspection apparatus of FIGS. 1 -19, 27, 33, 35, 44-51 , and 53-54.
- FIG. 53 is a schematic view of an assembly for treating vessels.
- the assembly is usable with the apparatus of FIGS. 1 -3, 8-9, 12-16, 18-22, 26-28, 33-35, and 37-49.
- FIG. 54 is a diagrammatic view of the embodiment of FIG. 53.
- FIG. 55 is a diagrammatic view similar to FIG. 2 of an embodiment of the invention including a plasma screen.
- FIG. 56 is a schematic sectional view of an array of gas delivery tubes, having independent gas supplies and a mechanism for inserting and removing the gas delivery tubes from a vessel holder.
- FIG. 57 is a plot of outgassing mass flow rate measured in Example 19.
- FIG. 58 shows a linear rack, otherwise similar to FIG. 4.
- FIG. 59 shows a schematic representation of a vessel processing system according to an exemplary embodiment of the present invention.
- FIG. 60 shows a schematic representation of a vessel processing system according to another exemplary embodiment of the present invention.
- FIG. 61 shows a processing station of a vessel processing system according to an exemplary embodiment of the present invention.
- FIG. 62 shows a portable vessel holder according to an exemplary embodiment of the present invention.
- RF radio frequency
- First and “second” or similar references to, e.g., processing stations or processing devices refer to the minimum number of processing stations or devices that are present, but do not necessarily represent the order or total number of processing stations and devices. These terms do not limit the number of processing stations or the particular processing carried out at the respective stations.
- an "organosilicon precursor” is a compound having at least one of the linkage:
- a volatile organosilicon precursor defined as such a precursor that can be supplied as a vapor in a PECVD apparatus, is a preferred organosilicon precursor.
- the organosilicon precursor is selected from the group consisting of a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, an alkyl trimethoxysilane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, and a combination of any two or more of these precursors.
- essentially no oxygen or (synonymously) “substantially no oxygen” is added to the gaseous reactant in some embodiments. This means that some residual atmospheric oxygen can be present in the reaction space, and residual oxygen fed in a previous step and not fully exhausted can be present in the reaction space, which are defined here as essentially no oxygen present. Essentially no oxygen is present in the gaseous reactant in particular if the gaseous reactant comprises less than 1 vol% O 2 , more particularly less than 0.5 vol% O 2 , and even more particularly if it is O 2 -free, If no oxygen is added to the gaseous reactant, or if no oxygen at all is present during PECVD, this is also within the scope of "essentially no oxygen.”
- a "vessel" in the context of the present invention may be any type of vessel with at least one opening and a wall defining an interior surface.
- the term “at least” in the context of the present invention means “equal or more” than the integer following said term.
- a vessel in the context of the present invention has one or more openings.
- One or two openings like the openings of a sample tube (one opening) or a syringe barrel (two openings) are preferred. If the vessel has two openings, they may be of same or different size. If there is more than one opening, one opening may be used for the gas inlet for a PECVD coating method according to the present invention, while the other openings are either capped or open.
- a vessel according to the present invention may be a sample tube, e.g. for collecting or storing biological fluids like blood or urine, a syringe (or a part thereof, for example a syringe barrel) for storing or delivering a biologically active compound or composition, e.g. a medicament or pharmaceutical composition, a vial for storing biological materials or biologically active compounds or compositions, a pipe, e.g. a catheter for transporting biological materials or biologically active compounds or compositions, or a cuvette for holding fluids, e.g. for holding biological materials or biologically active compounds or compositions.
- a vessel may be of any shape, a vessel having a substantially cylindrical wall adjacent to at least one of its open ends being preferred.
- the interior wall of the vessel is cylindrically shaped, like, e.g. in a sample tube or a syringe barrel.
- Sample tubes and syringes or their parts are particularly preferred.
- a “hydrophobic coating” in the context of the present invention means that the coating lowers the wetting tension of a surface coated with said coating, compared to the corresponding uncoated surface. Hydrophobicity is thus a function of both the uncoated substrate and the coating. The same applies with appropriate alterations for other contexts wherein the term “hydrophobic” is used.
- the term “hydrophilic” means the opposite, i.e. that the wetting tension is increased compared to reference sample.
- a particular hydrophobic coating in the context of present invention may be a coating having the empirical or sum formula Si w O x CyH z , where w is 1 , x is from about 0.5 to about 2.4, y is from about 0.6 to about 3, and z is from 2 to about 9.
- wetting tension is a specific measure for the hydrophobicity or hydrophilicity of a surface.
- the preferred wetting tension measurement method in the context of the present invention is ASTM D 2578 or a modification of the method described in ASTM D 2578. This method uses standard wetting tension solutions (called dyne solutions) to determine the solution that comes nearest to wetting a plastic film surface for exactly two seconds. This is the film's wetting tension.
- the procedure utilized is varied herein from ASTM D 2578 in that the substrates are not flat plastic films, but are tubes made according to the Protocol for Forming PET Tube and (except for controls) coated according to the Protocol for Coating Tube Interior with Hydrophobic Coating (see Example 9).
- a “lubricity coating” according to the present invention is a coating which has a lower frictional resistance than the uncoated surface. In other words, it reduces the frictional resistance of the coated surface in comparison to the a reference surface which is uncoated.
- “Frictional resistance” can be static frictional resistance and/or kinetic frictional resistance.
- One of the preferred embodiments of the present invention is a syringe part, e.g. a syringe barrel or plunger, coated with a lubricity coating.
- the relevant static frictional resistance in the context of the present invention is the breakout force as defined herein
- the relevant kinetic frictional resistance in the context of the present invention is the plunger sliding force as defined herein.
- the plunger sliding force as defined and determined herein is suitable to determine the presence or absence and the lubricity characteristics of a lubricity coating in the context of the present invention whenever the coating is applied to any syringe or syringe part, for example to the inner wall of a syringe barrel.
- the breakout force is of particular relevance for evaluation of the coating effect on a prefilled syringe, i.e. a syringe which is filled after coating and may be stored for some time, e.g. several months or even years, before the plunger is moved again (has to be "broken out").
- the "plunger sliding force” in the context of the present invention is the force required to maintain movement of a plunger in a syringe barrel, e.g. during aspiration or dispense. It may advantageously be determined using the ISO 7886-1 :1993 test described herein and known in the art. A synonym for "plunger sliding force” often used in the art is “plunger force” or “pushing force”.
- breakout force in the context of the present invention is the initial force required to move the plunger in a syringe, for example in a prefilled syringe.
- substantially rigid means that the assembled components (ports, duct, and housing, explained further below) can be moved as a unit by handling the housing, without significant displacement of any of the assembled components respecting the others. Specifically, none of the components are connected by hoses or the like that allow substantial relative movement among the parts in normal use. The provision of a substantially rigid relation of these parts allows the location of the vessel seated on the vessel holder to be nearly as well known and precise as the locations of these parts secured to the housing. [413] In the following, the apparatus for performing the present invention will be described first, followed by the coating methods, coatings and coated vessels, and the uses according to the present invention.
- a vessel processing system comprising a first processing station, a second processing station, a multiplicity of vessel holders, and a conveyor.
- the first processing station is configured for processing a vessel having an opening and a wall defining an interior surface.
- the second processing station is spaced from the first processing station and configured for processing a vessel having an opening and a wall defining an interior surface.
- At least some, optionally all, of the vessel holders include a vessel port configured to receive and seat the opening of a vessel for processing the interior surface of a seated vessel via the vessel port at the first processing station.
- the conveyor is configured for transporting a series of the vessel holders and seated vessels from the first processing station to the second processing station for processing the interior surface of a seated vessel via the vessel port at the second processing station.
- the vessel processing system can include processing stations which more broadly are contemplated to be processing devices.
- the vessel processing system 20 of the illustrated embodiment can include an injection molding machine 22 (which can be regarded as a processing station or device), additional processing stations or devices 24, 26, 28, 30, 32, and 34, and an output 36 (which can be regarded as a processing station or device).
- the system 20 has at least a first processing station, for example station 28, and a second processing station, for example 30, 32, or 34.
- Any of the processing stations 22-36 in the illustrated embodiment can be a first processing station, any other processing station can be a second processing station, and so forth.
- the embodiment illustrated in FIG. 1 can include eight processing stations or devices: 22, 24, 26, 28, 30, 32, 34, and 36.
- the exemplary vessel processing system 20 includes an injection molding machine 22, a post-molding inspection station 24, a pre-coating inspection station 26, a coating station 28, a post-coating inspection station 30, an optical source transmission station 32 to determine the thickness of the coating, an optical source transmission station 34 to examine the coating for defects, and an output station 36.
- the system 20 can include a transfer mechanism 72 for moving vessels from the injection molding machine 22 to a vessel holder 38.
- the transfer mechanism 72 can be configured, for example, as a robotic arm that locates, moves to, grips, transfers, orients, seats, and releases the vessels 80 to remove them from the vessel forming machine 22 and install them on the vessel holders such as 38.
- the system 20 also can include a transfer mechanism at a processing station 74 for removing the vessel from one or more vessel holders such as 66, following processing the interior surface of the seated vessel such as 80 (FIG. 1 ).
- the vessels 80 are thus movable from the vessel holder 66 to packaging, storage, or another appropriate area or process step, generally indicated as 36.
- the transfer mechanism 74 can be configured, for example, as a robotic arm that locates, moves to, grips, transfers, orients, places, and releases the vessels 80 to remove them from the vessel holders such as 38 and place them on other equipment at the station 36.
- the processing stations or devices 32, 34, and 36 shown in FIG. 1 optionally carry out one or more appropriate steps downstream of the coating and inspection system 20, after the individual vessels 80 are removed from the vessel holders such as 64.
- Some non-limiting examples of functions of the stations or devices 32, 34, and 36 include:
- the vessel processing system 20 as illustrated in FIG. 1 also can include a multiplicity of vessel holders (or "pucks,” as they can in some embodiments resemble a hockey puck) respectively 38 through 68, and a conveyor generally indicated as an endless band 70 for transporting one or more of the vessel holders 38-68, and thus vessels such as 80, to or from the processing stations 22, 24, 26, 28, 30, 32, 34, and 36.
- vessel holders or "pucks," as they can in some embodiments resemble a hockey puck
- a conveyor generally indicated as an endless band 70 for transporting one or more of the vessel holders 38-68, and thus vessels such as 80, to or from the processing stations 22, 24, 26, 28, 30, 32, 34, and 36.
- the processing station or device 22 can be a device for forming the vessels 80.
- One contemplated device 22 can be an injection molding machine.
- Another contemplated device 22 can be a blow molding machine. Vacuum molding machines, draw molding machines, cutting or milling machines, glass drawing machines for glass or other draw-formable materials, or other types of vessel forming machines are also contemplated.
- the vessel forming station 22 can be omitted, as vessels can be obtained already formed.
- the portable vessel holders 38-68 are provided for holding and conveying a vessel having an opening while the vessel is processed.
- the vessel holder includes a vessel port, a second port, a duct, and a conveyable housing.
- the vessel port is configured to seat a vessel opening in a mutually communicating relation.
- the second port is configured to receive an outside gas supply or vent.
- the duct is configured for passing one or more gases between a vessel opening seated on the vessel port and the second port.
- the vessel port, second port, and duct are attached in substantially rigid relation to the conveyable housing.
- the portable vessel holder weighs less than five pounds. An advantage of a lightweight vessel holder is that it can more readily be transported from one processing station to another.
- the duct more specifically is a vacuum duct and the second port more specifically is a vacuum port.
- the vacuum duct is configured for withdrawing a gas via the vessel port from a vessel seated on the vessel port.
- the vacuum port is configured for communicating between the vacuum duct and an outside source of vacuum.
- the vessel port, vacuum duct, and vacuum port can be attached in substantially rigid relation to the conveyable housing.
- the vessel holders of embodiments II. A. and II.A.1. are shown, for example, in FIG. 2.
- the vessel holder 50 has a vessel port 82 configured to receive and seat the opening of a vessel 80.
- the interior surface of a seated vessel 80 can be processed via the vessel port 82.
- the vessel holder 50 can include a duct, for example a vacuum duct 94, for withdrawing a gas from a vessel 80 seated on the vessel port 92.
- the vessel holder can include a second port, for example a vacuum port 96 communicating between the vacuum duct 94 and an outside source of vacuum, such as the vacuum pump 98.
- the vessel port 92 and vacuum port 96 can have sealing elements, for example O-ring butt seals, respectively 100 and 102, or side seals between an inner or outer cylindrical wall of the vessel port 82 and an inner or outer cylindrical wall of the vessel 80 to receive and form a seal with the vessel 80 or outside source of vacuum 98 while allowing communication through the port.
- Seals or other sealing arrangements can or also be used.
- the vessel holder such as 50 can be made of any material, for example thermoplastic material and/or electrically nonconductive material. Or, the vessel holder such as 50 can be made partially, or even primarily, of electrically conductive material and faced with electrically nonconductive material, particularly in the passages defined by the vessel port 92, vacuum duct 94, and vacuum port 96.
- suitable materials for the vessel holder 50 are: a polyacetal, for example Delrin® acetal material sold by E. I. du Pont De Nemours and Company, Wilmington Delaware; polytetrafluoroethylene (PTFE), for example Teflon® PTFE sold by E. I. du Pont De Nemours and Company, Wilmington Delaware; Ultra-High-Molecular-Weight Polyethylene (UHMWPE); High density Polyethylene (HDPE); or other materials known in the art or newly discovered.
- PTFE polytetrafluoroethylene
- UHMWPE Ultra-High-Molecular-Weight Polyethylene
- HDPE High density Polyethylene
- FIG. 2 also illustrates that the vessel holder, for example 50, can have a collar 1 16 for centering the vessel 80 when it is approaching or seated on the port 92.
- Yet another approach to treat, inspect, and/or move parts through a production system can be to use an array of vessel holders.
- the array can be comprised of individual pucks or be a solid array into which the devices are loaded.
- An array can allow more than one device, optionally many devices, to be tested, conveyed or treated/coated simultaneously.
- the array can be one-dimensional, for example grouped together to form a linear rack, or two-dimensional, similar to a tub or tray.
- FIGS. 4, 5, and 58 show three array approaches.
- FIG. 4 shows a solid array 120 into (or onto) which the devices or vessels 80 are loaded.
- the devices or vessels 80 can move through the production process as a solid array, although they can be removed during the production process and transferred to individual vessel holders.
- a single vessel holder 120 has multiple vessel ports such as 122 for conveying an array of seated vessels such as 80, moving as a unit.
- multiple individual vacuum ports such as 96 can be provided to receive an array of vacuum sources 98.
- a single vacuum port connected to all the vessel ports such as 96 can be provided.
- Multiple gas inlet probes such as 108 can also be provided in an array.
- the arrays of gas inlet probes or vacuum sources can be mounted to move as a unit to process many vessels such as 80 simultaneously. Or, the multiple vessel ports such as 122 can be addressed one or more rows at a time, or individually, in a processing station.
- the number of devices in the array can be related to the number of devices that are molded in a single step or to other tests or steps that can allow for efficiency during the operation.
- the electrodes can either be coupled together (to form one large electrode), or can be individual electrodes each with its own power supply. All of the above approaches can still be applicable (from the standpoint of the electrode geometry, frequency etc.). [432] II. A. In FIG.
- FIG. 58 shows a linear rack, otherwise similar to FIG. 4. If a linear rack is used, another option, in addition to those explained above, is to transport the rack in single file fashion through a processing station, processing the vessels serially.
- FIGS. 42 and 43 are respectively a fragmentary detail longitudinal section and a detail view of a vessel holder 450 provided with an alternative sealing arrangement, usable for example, with the vessel holder embodiments of FIGS. 2, 3, 6, 7, 19, 12, 13, 16, 18, 19, 30, and 43 for seating a vessel on a vessel holder.
- the vessel for example a syringe barrel 438
- seated on the vessel holder 450 has a back opening 442 defined by a generally annular (and commonly chamfered or rounded) lip 452, as well as a generally cylindrical sidewall 454.
- a medical fluid collection tube commonly has the same type of lip 452, but without a flange 440, and thus can be seated on the vessel holder 450 instead.
- the vessel holder 450 in the embodiment as illustrated includes a generally cylindrical inner surface 456 that in the illustrated embodiment serves as a guide surface to receive the generally cylindrical sidewall 454 of the syringe barrel 438.
- the well is further defined by a generally annular abutment 458 against which the annular lip 452 abuts when the syringe barrel 438 is seated on the vessel holder 450.
- a generally annular pocket or groove 460 formed in the inner surface 456 is provided for retaining the sealing element, for example an O-ring 462.
- the radial depth of the pocket 460 is less than the radial cross-section of the sealing element, for example an O-ring 462 (as illustrated in FIG.
- the inner diameter of the O-ring 462 preferably is preferably slightly smaller than the outer diameter of the annular lip 452.
- [436] II. B. These relative dimensions cause the radial cross-section of the O-ring 462 to compress horizontally between at least the outside wall 464 of the pocket 460 and the generally cylindrical sidewall 454 of the syringe barrel 438, as shown in FIG. 42, when a vessel such as 438 is seated as shown in FIG. 42. This compression flattens the bearing surfaces of the O-ring 462, forming a seal between at least the outside wall 464 of the pocket 460 and the generally cylindrical sidewall 454 of the syringe barrel 438.
- the pocket 460 optionally can be constructed, in relation to the dimensions of the O-ring 462, to form two more seals between the bottom and top walls 466 and 468 and the sidewall 454, by spacing the top and bottom walls 468 and 466 about as far apart as the corresponding radial cross-section diameter of the O-ring 462.
- the O-ring 462 When the O-ring 462 is squeezed between the outside wall 464 and the generally cylindrical sidewall 454 of the pocket 460, its resilience will cause it to expand upward and downward as shown in FIG. 43, thus also engaging the top and bottom walls 466 and 464 and flattening against them.
- the O-ring 462 optionally will thus be deformed both vertically and horizontally, tending to square its normally round cross-section. Additionally, the annular lip 452 seated on the abutment 458 will limit the flow of PECVD process reactants and other gases and materials introduced through or adjacent to the back opening 442.
- the pocket 460 can be formed with its bottom wall 466 above the abutment 458 shown in FIG. 43.
- more than one axially spaced pocket 460 can be provided to provide a double or higher-level seal and to further restrain the vessel 438 against rocking when seated against the abutment 458.
- FIG. 45 is an alternative construction for a vessel holder 482 usable, for example, with the embodiments of FIGS. 1 , 2, 3, 6-10, 12-16, 18, 19, 21 , 22, 26, 28, 33- 35, and 37-44.
- the vessel holder 482 comprises an upper portion 484 and a base 486 joined together at a joint 488.
- a sealing element for example an O-ring 490 (the right side of which is cut away to allow the pocket retaining it to be described) is captured between the upper portion 484 and the base 486 at the joint 488.
- the O-ring 490 is received in an annular pocket 492 to locate the O-ring when the upper portion 484 is joined to the base 486.
- the O-ring 490 is captured and bears against a radially extending abutment surface 494 and the radially extending wall 496 partially defining the pocket 492 when the upper portion 484 and the base 486 are joined, in this case by the screws 498 and 500.
- the O-ring 490 thus seats between the upper portion 484 and base 486.
- the O-ring 490 captured between the upper portion 484 and the base 486 also receives the vessel 80 (removed in this figure for clarity of illustration of other features) and forms a first O-ring seal of the vessel port 502 about the vessel 80 opening, analogous to the O-ring seal arrangement about the vessel back opening 442 in FIG. 42.
- the vessel port 502 has both the first O-ring 490 seal and a second axially spaced O-ring 504 seal, each having an inner diameter such as 506 sized to receive the outer diameter (analogous to the sidewall 454 in FIG. 43) of a vessel such as 80 for sealing between the vessel port 502 and a vessel such as 80.
- the spacing between the O-rings 490 and 504 provides support for a vessel such as 80 at two axially spaced points, preventing the vessel such as 80 from being skewed with respect to the O-rings 490 and 504 or the vessel port 502.
- the radially extending abutment surface 494 is located proximal of the O-ring 490 and 506 seals and surrounding the vacuum duct 508.
- FIGS. 1 , 2, and 10 show a method for processing a vessel 80. The method can be carried out as follows.
- a vessel 80 can be provided having an opening 82 and a wall 86 defining an interior surface 88.
- the vessel 80 can be formed in and then removed from a mold such as 22.
- a mold such as 22.
- the vessel 80 can be moved without distorting it during processing (assuming that it is made at an elevated temperature, from which it progressively cools)
- the vessel opening 82 can be seated on the vessel port 92.
- a vessel holder such as 50 comprising a vessel port 92 can be provided.
- the opening 82 of the vessel 80 can be seated on the vessel port 92.
- the vessel holder such as 40 (for example in FIG. 6) can be transported into engagement with one or more of the bearing surfaces 220-240 to position the vessel holder 40 with respect to the processing device or station such as 24.
- One, more than one, or all of the processing stations such as 24-34, as illustrated by the station 24 shown in FIG. 6, can include a bearing surface, such as one or more of the bearing surfaces 220, 222, 224, 226, 228, 230, 232, 234, 236, 238, or 240, for supporting one or more vessel holders such as 40 in a predetermined position while processing the interior surface 88 of the seated vessel 80 at the processing station or device such as 24.
- These bearing surfaces can be part of stationary or moving structure, for example tracks or guides that guide and position the vessel holder such as 40 while the vessel is being processed.
- the downward-facing bearing surfaces 222 and 224 locate the vessel holder 40 and act as a reaction surface to prevent the vessel holder 40 from moving upward when the probe 108 is being inserted into the vessel holder 40.
- the reaction surface 236 locates the vessel holder and prevents the vessel holder 40 from moving to the left while a vacuum source 98 (per FIG. 2) is seated on the vacuum port 96.
- the bearing surfaces 220, 226, 228, 232, 238, and 240 similarly locate the vessel holder 40 and prevent horizontal movement during processing.
- the bearing surfaces 230 and 234 similarly locate the vessel holder such as 40 and prevent it from moving vertically out of position.
- a first bearing surface, a second bearing surface, a third bearing surface, or more can be provided at each of the processing stations such as 24-34.
- the interior surface 88 of the seated vessel 80 can be then processed via the vessel port 92 at the first processing station, which can be, as one example, the barrier application or other type of coating station 28 shown in FIG. 2.
- the vessel holder 50 and seated vessel 80 are transported from the first processing station 28 to the second processing station, for example the processing station 32.
- the interior surface 88 of the seated vessel 80 can be processed via the vessel port 92 at the second processing station such as 32.
- Any of the above methods can include the further step of removing the vessel 80 from the vessel holder such as 66 following processing the interior surface 88 of the seated vessel 80 at the second processing station or device.
- Any of the above methods can include the further step, after the removing step, of providing a second vessel 80 having an opening 82 and a wall 86 defining an interior surface 88.
- the opening 82 of the second vessel such as 80 can be seated on the vessel port 92 of another vessel holder such as 38.
- the interior surface of the seated second vessel 80 can be processed via the vessel port 92 at the first processing station or device such as 24.
- the vessel holder such as 38 and seated second vessel 80 can be transported from the first processing station or device 24 to the second processing station or device such as 26.
- the seated second vessel 80 can be processed via the vessel port 92 by the second processing station or device 26.
- the processing stations can more broadly be processing devices, and either the vessel holders can be conveyed relative to the processing devices, the processing devices can be conveyed relative to the vessel holders, or some of each arrangement can be provided in a given system.
- the vessel holders can be conveyed to one or more stations, and more than one processing device can be deployed at or near at least one of the stations. Thus, there is not necessarily a one-to-one correspondence between the processing devices and processing stations.
- a method including several parts is contemplated for processing a vessel.
- a first processing device such as the probe 108 (FIG. 2) and a second processing device such as a light source 170 (FIG. 10) are provided for processing vessels such as 80.
- a vessel 80 is provided having an opening 82 and a wall 86 defining an interior surface 88.
- a vessel holder 50 is provided comprising a vessel port 92. The opening 82 of the vessel 80 is seated on the vessel port 92.
- the first processing device such as the probe 108 is moved into operative engagement with the vessel holder 50, or vice versa.
- the interior surface 88 of the seated vessel 80 is processed via the vessel port 92 using the first processing device or probe 108.
- a third processing device 34 can be provided for processing vessels 80.
- the third processing device 34 can be moved into operative engagement with the vessel holder 50, or vice versa.
- the interior surface of the seated vessel 80 can be processed via the vessel port 92 using the third processing device 34.
- the vessel 80 can be provided having an opening 82 and a wall 86 defining an interior surface 88.
- a vessel holder such as 50 comprising a vessel port 92 can be provided.
- the opening 82 of the vessel 80 can be seated on the vessel port 92.
- the interior surface 88 of the seated vessel 80 can be processed via the vessel port 92 at by the first processing device, which can be, as one example, the barrier or other type of coating device 28 shown in FIG. 2.
- the vessel holder 50 and seated vessel 80 are transported from the first processing device 28 to the second processing device, for example the processing device 34 shown in FIGS. 1 and 10.
- the interior surface 88 of the seated vessel 80 can be then processed via the vessel port 92 by the second processing device such as 34.
- a first vessel is provided having an open end, a closed end, and an interior surface.
- At least a first gripper is configured for selectively holding and releasing the closed end of the first vessel.
- the closed end of the first vessel is gripped with the first gripper and, using the first gripper, transported to the vicinity of a vessel holder configured for seating to the open end of the first vessel.
- the first gripper is then used to axially advance the first vessel and seat its open end on the vessel holder, establishing sealed communication between the vessel holder and the interior of the first vessel.
- At least one gaseous reactant is introduced within the first vessel through the vessel holder. Plasma is formed within the first vessel under conditions effective to form a reaction product of the reactant on the interior surface of the first vessel.
- the first vessel is then unseated from the vessel holder and, using the first gripper or another gripper, the first vessel is axially transported away from the vessel holder. The first vessel is then released from the gripper used to axially transport it away from the vessel holder.
- a series conveyor 538 can be used to support and transport multiple grippers such as 204 through the apparatus and process as described here.
- the grippers 204 are operatively connected to the series conveyor 538 and configured for successively transporting a series of at least two vessels 80 to the vicinity of the vessel holder 48 and carrying out the other steps of the cleaning method as described here.
- IV.A Another embodiment is a PECVD apparatus including a vessel holder, an inner electrode, an outer electrode, and a power supply.
- a vessel seated on the vessel holder defines a plasma reaction chamber, which optionally can be a vacuum chamber.
- a source of vacuum, a reactant gas source, a gas feed or a combination of two or more of these can be supplied.
- a gas drain not necessarily including a source of vacuum, is provided to transfer gas to or from the interior of a vessel seated on the port to define a closed chamber.
- the PECVD apparatus can be used for atmospheric-pressure PECVD, in which case the plasma reaction chamber does not need to function as a vacuum chamber.
- the vessel holder 50 comprises a gas inlet port 104 for conveying a gas into a vessel seated on the vessel port.
- the gas inlet port 104 has a sliding seal provided by at least one O-ring 106, or two O-rings in series, or three O-rings in series, which can seat against a cylindrical probe 108 when the probe 108 is inserted through the gas inlet port 104.
- the probe 108 can be a gas inlet conduit that extends to a gas delivery port at its distal end 1 10.
- the distal end 1 10 of the illustrated embodiment can be inserted deep into the vessel 80 for providing one or more PECVD reactants and other process gases.
- a plasma screen 610 can be provided to confine the plasma formed within the vessel 80 generally to the volume above the plasma screen 610.
- the plasma screen 610 is a conductive, porous material, several examples of which are steel wool, porous sintered metal or ceramic material coated with conductive material, or a foraminous plate or disk made of metal (for example brass) or other conductive material.
- An example is a pair of metal disks having central holes sized to pass the gas inlet 108 and having 0.02-inch (0.5 mm) diameter holes spaced 0.04 inches (1 mm) apart, center-to-center, the holes providing 22% open area as a proportion of the surface area of the disk.
- the plasma screen 610 can make intimate electrical contact with the gas inlet 108 at or near the opening 82 of the tube, syringe barrel, or other vessel 80 being processed.
- the plasma screen 610 can be grounded, preferably having a common potential with the gas inlet 108.
- the plasma screen 610 reduces or eliminates the plasma in the vessel holder 50 and its internal passages and connections, for example the vacuum duct 94, the gas inlet port 104, the vicinity of the O-ring 106, the vacuum port 96, the O-ring 102, and other apparatus adjacent to the gas inlet 108.
- the porosity of the plasma screen allows process gases, air, and the like to flow out of the vessel 80 into the vacuum port 96 and downstream apparatus.
- the vessel holder 1 12 comprises a composite gas inlet port and vacuum port 96 communicating with the vessel port 92, respectively for conveying a gas into a vessel 80 seated on the vessel port 92 (via the probe 108) and withdrawing a gas from a vessel seated on the vessel port 92 (via the vacuum source 98).
- the gas inlet probe 108 and vacuum source 98 can be provided as a composite probe. The two probes can be advanced as a unit or separately, as desired. This arrangement eliminates the need for a third seal 106 and allows the use of butt seals throughout.
- a butt seal allows the application of an axial force, for example by drawing a vacuum within the vessel 80, to positively seat the vessel 80 and vacuum source 98 by deforming the O-rings, tending to close any gap left by the presence of any irregularities in the sealing surface on either side of the O-ring.
- the axial forces applied by the vessel 80 and vacuum source 98 on the vessel holder 1 12 are in opposition, tending to hold the vessel 80 and the vessel holder 1 12 together and maintain the respective butt seals.
- FIG. 13 is a view similar to FIG. 2 of a vessel holder 48 in a coating station according to yet another embodiment of the disclosure, in which the vessel 80 can be seated on the vessel holder 48 at the process station. This can be used to process a vessel 80 that does not travel with a vessel holder such as 48, or it can be used in a barrier or other type of coating station 28 that first seats the vessel 80 in a vessel holder such as 48 before the seated vessel 80 is conveyed to other apparatus by the system 20.
- FIG. 13 shows a cylindrical electrode 160 suited for frequencies from 50 Hz to 1 GHz, as an alternative to the U-shaped electrode of FIGS. 2 and 9.
- the vessel holder (or the electrode) can be moved into place prior to activation by either moving the electrode down or the vessel holder up. Or, the movement of the vessel holder and electrode in the vertical plane can be circumvented by creating an electrode 160 constructed like a clamshell (two half cylinders that can come together from opposite sides when the vessel holder is in position and ready for treatment/coating).
- the vacuum source 98 makes a seal with the puck or vessel holder 50 that can be maintained during movement of the vessel holder, if the process is a continuous process in which the tube is moved through the coating station such as 28 while a vacuum is drawn and gas is introduced through the probe 108.
- a stationary process can be employed in which the puck or vessel holder 50 is moved into a stationary position, at which time the probe 108 is pushed up into the device and then the pump or vacuum source 98 is coupled at the vacuum port 96 and activated to create a vacuum.
- plasma can be established inside of the tube or vessel 80 with an external fixed electrode 160 that is independent of the puck or vessel holder 50 and the tube or other vessel 80.
- FIG. 53 shows additional optional details of the coating station 28 that are usable, for example, with the embodiments of FIGS. 1 , 2, 3, 6-10, 12-16, 18, 19, 21 , 22, 26-28, 30, 33-35, 37-44, and 52.
- the coating station 28 can also have a main vacuum valve 574 in its vacuum line 576 leading to the pressure sensor 152.
- a manual bypass valve 578 is provided in the bypass line 580.
- a vent valve 582 controls flow at the vent 404.
- Flow out of the PECVD gas source 144 is controlled by a main reactant gas valve 584 regulating flow through the main reactant feed line 586.
- One component of the gas source 144 is the organosilicon liquid reservoir 588.
- the contents of the reservoir 588 are drawn through the organosilicon capillary line 590, which is provided at a suitable length to provide the desired flow rate.
- Flow of organosilicon vapor is controlled by the organosilicon shut-off valve 592.
- Pressure is applied to the headspace 614 of the liquid reservoir 588, for example a pressure in the range of 0-15 psi (0 to 78 cm.
- a pressure source 616 such as pressurized air connected to the headspace 614 by a pressure line 618 to establish repeatable organosilicon liquid delivery that is not dependent on atmospheric pressure (and the fluctuations therein).
- the reservoir 588 is sealed and the capillary connection 620 is at the bottom of the reservoir 588 to ensure that only neat organosilicon liquid (not the pressurized gas from the headspace 614) flows through the capillary tube 590.
- the organosilicon liquid optionally can be heated above ambient temperature, if necessary or desirable to cause the organosilicon liquid to evaporate, forming an organosilicon vapor.
- Oxygen is provided from the oxygen tank 594 via an oxygen feed line 596 controlled by a mass flow controller 598 and provided with an oxygen shut-off valve 600.
- the station or device 26 can include a vacuum source 98 adapted for seating on the vacuum port 96, a side channel 134 connected to the probe 108, or both (as illustrated).
- the side channel 134 includes a shut-off valve 136 that regulates flow between a probe port 138 and a vacuum port 140.
- the selection valve 136 has at least two states: an evacuation state in which the ports 138 and 140 are connected, providing two parallel paths for gas flow (thus increasing the rate of pumping or decreasing the pumping effort) and a disconnection state in which the ports 138 and 140 are isolated.
- the selection valve 136 can have a third port, such as a PECVD gas inlet port 142, for introducing PECVD reactive and process gases from a gas source 144.
- a third port such as a PECVD gas inlet port 142, for introducing PECVD reactive and process gases from a gas source 144.
- This expedient allows the same vacuum supply and probe 108 to be used both for leak or permeation testing and for applying the barrier or other type of coating.
- the vacuum line such as 146 to the vacuum source 98 can also include a shut-off valve 148.
- the shut-off valves 136 and 148 can be closed when the probe 108 and vacuum source 98 are not connected to a vessel holder such as 44 so the side channel 134 and the vacuum line 146 do not need to be evacuated on the side of the valves 136 and 148 away from the vessel 80 when moved from one vessel holder 44 to another.
- a flexible line 150 can be provided to allow axial movement of the probe 108 independent of the position of the vacuum line 146 relative to the port 96.
- FIG. 7 also shows another optional feature usable with any embodiment - a vent 404 to ambient air controlled by a valve 406.
- the valve 406 can be opened to break the vacuum quickly after processing the vessel 80, whether to release the vessel 80 from the vessel holder 44, to release the vessel holder 44 at the vacuum port 96 from the source of vacuum 98, or optionally both.
- the probe 108 can also be connected to a pressure gauge 152 and can communicate with the interior 154 of the vessel 80, allowing the pressure within the vessel 80 to be measured.
- the vessel coating station 28 can be, for example, a PECVD apparatus as further described below, operated under suitable conditions to deposit a SiO x barrier or other type of coating 90 on the interior surface 88 of a vessel 80, as shown in FIG. 2.
- the processing station 28 can include an electrode 160 fed by a radio frequency power supply 162 for providing an electric field for generating plasma within the vessel 80 during processing.
- the probe 108 is also electrically conductive and is grounded, thus providing a counter-electrode within the vessel 80.
- the outer electrode 160 can be grounded and the probe 108 directly connected to the power supply 162.
- the outer electrode 160 can either be generally cylindrical as illustrated in FIGS 2 and 8 or a generally U-shaped elongated channel as illustrated in FIGS. 2 and 9 (FIGS. 8 and 9 being alternative embodiments of the section taken along section line A — A of FIG. 2).
- Each illustrated embodiment has one or more sidewalls, such as 164 and 166, and optionally a top end 168, all disposed about the vessel 80 in close proximity.
- FIGS. 12 to 19 show other variants of the vessel coating station or device 28 as previously described. Any one or more of these variants can be substituted for the vessel coating station or device 28 shown in FIG. 1 -5.
- FIG. 12 shows an alternative electrode system that can be used (in the same manner as discussed above using the same vessel holder and gas inlet) at frequencies above 1 GHz.
- the electrical energy from the power supply can be transferred to the interior of the tube through one or more waveguides that are connected to a cavity that either absorbs the energy or resonates the energy. Resonating the energy allows it to couple to the gas.
- Different cavities can be provided for use with different frequencies and vessels such as 80, since the vessel 80 will interact with the cavity altering its resonation point, creating plasma for coating and/or treatment.
- FIG. 12 shows that the coating station 28 can include a microwave power supply 190 directing microwaves via a waveguide 192 to a microwave cavity 194 at least partially surrounding the vessel 80 within which plasma can be to be generated.
- the microwave cavity 194 can be tuned, in relation to the frequency of the microwaves and the partial pressures and selection of gases, to absorb microwaves and couple to the plasma-generating gas.
- a small gap 196 can be left between the vessel 80 and the cavity 194 (or electrode, detector, or other surrounding structure) to avoid scratching or otherwise damaging the vessel 80. Also in FIG.
- FIG. 44 is a view similar to FIG. 2 of an alternative gas delivery tube/inner electrode 470 usable, for example with the embodiments of FIGS. 1 , 2, 3, 8, 9, 12-16, 18-19, 21 -22, 33, 37-43, 46-49, and 52-54.
- the distal portion 472 of the inner electrode 470 comprises an elongated porous side wall 474 enclosing an internal passage 476 within the inner electrode.
- the internal passage 476 is connected to the gas feed 144 by the proximal portion 478 of the inner electrode 470 extending outside the vessel 80.
- the distal end 480 of the inner electrode 470 can also optionally be porous.
- the porosity of the porous side wall 474 and, if present, the porous distal end 480 allow at least a portion of the reactant gas fed from the gas feed 144 to escape laterally from the passage 476 to supply reactant gas to the adjacent portion of the interior surface 88 of the vessel 80.
- the porous portion of the porous side wall 474 extends the entire length of the inner electrode 470 within the vessel 80, although the porous portion could be less extensive, running only a portion of the length of the inner electrode 470.
- the inner electrode 470 could also be longer or shorter, relative to the length of the vessel 80, than is shown in FIG. 44, and the porous portion can be continuous or discontinuous.
- the outer diameter of the inner electrode 470 can be at least 50% as great, or at least 60% as great, or at least 70% as great, or at least 80% as great, or at least 90% as great, or at least 95% as great as the laterally adjacent inner diameter of the vessel.
- Employing a larger-diameter inner electrode 470 also provides more uniform distribution of the reactant gas and/or carrier gas along the interior surface 80, as fresh gases are introduced to the plasma at closely spaced points along the length of the interior surface 88, very close to the site of initial reaction, as opposed to flowing from a single point relative to the interior surface 88 to form.
- the power supply 162 has one power connection to the electrode 200, which can be at any point along the electrode 200, and the probe 108 can be grounded. In this configuration a capacitive load can be used to generate the plasma within the vessel 80.
- the respective leads of the power supply 162 are connected to the respective ends of the coil 200, which for convenience can be again referred to as an "electrode" in this specification.
- an inductive load can be used to generate the plasma within the vessel 80.
- a combination of inductive and capacitive loads can also be used, in an alternative embodiment.
- FIGS. 46-48 show an array of two or more gas delivery tubes such as 108 (also shown in FIG. 2), 510, and 512, which are also inner electrodes.
- the array can be linear or a carousel.
- a carousel array allows the electrodes to be reused periodically.
- FIGS. 46-48 also show an inner electrode extender and retractor 514 for inserting and removing the gas delivery tubes / inner electrodes 108, 510, and 512 into and from one or more vessel holders such as 50 or 48. These features are optional expedients for using the gas delivery tubes.
- the inner electrodes 108, 510, and 512 are respectively connected by flexible hoses 516, 518, and 520 to a common gas supply 144, via shut-off valves 522, 524, and 526.
- the flexible hoses are foreshortened in FIGS. 46-48 by omitting the slack portions).
- the flexible hoses 516, 518, and 520 alternatively can be connected to independent gas sources 144.
- a mechanism 514 is provided to extend and retract an inner electrode such as 108.
- the inner electrode extender and retractor is configured for moving an inner electrode among a fully advanced position, an intermediate position, and a retracted position with respect to the vessel holder.
- the inner electrode 108 is extended to its operative position within the vessel holder 50 and vessel 80, and its shut-off valve 522 is open. Also in FIG. 46, the idle inner electrodes 510 and 512 are retracted and their shut-off valves 524 and 526 are closed. In the illustrated embodiment, one or more of the idle inner electrodes 510 and 512 are disposed within an electrode cleaning device or station 528. One or more electrodes can be cleaned and others replaced within the station 528, optionally. The cleaning operations can involve chemical reaction or solvent treatment to remove deposits, milling to physically remove deposits, or plasma treatment to essentially burn away accumulated deposits, as non-limiting examples.
- the inner electrode 108 can be extended and partially retracted numerous times, as the vessel 80 is installed or removed from the vessel holder 50 at the station where the inner electrode 108 is in use
- each vessel 80 remains on its vessel holder such as 50 or 48 and an inner electrode such as 108 is inserted into each vessel as its vessel holder reaches the coating station.
- the movement of the array of inner electrodes can be independent of the movement of the vessel holders. They can be moved together or independently, to simultaneously or independently switch to a new vessel holder and/or a new inner electrode.
- FIGS. 46-48 show an array of two or more gas delivery tubes such as 108 (also shown in FIG. 2), 510, and 512, which are also inner electrodes.
- the array can be linear or a carousel.
- a carousel array allows the electrodes to be reused periodically.
- FIGS. 46-48 also show an inner electrode extender and retractor 514 for inserting and removing the gas delivery tubes / inner electrodes 108, 510, and 512 into and from one or more vessel holders such as 50 or 48. These features are optional expedients for using the gas delivery tubes.
- the inner electrodes 108, 510, and 512 are respectively connected by flexible hoses 516, 518, and 520 to a common gas supply 144, via shut-off valves 522, 524, and 526.
- the flexible hoses are foreshortened in FIGS. 46-48 by omitting the slack portions).
- a mechanism 514 is provided to extend and retract an inner electrode such as 108.
- the inner electrode extender and retractor is configured for moving an inner electrode among a fully advanced position, an intermediate position, and a retracted position with respect to the vessel holder.
- the inner electrode 108 is extended to its operative position within the vessel holder 50 and vessel 80, and its shut-off valve 522 is open. Also in FIGS. 46 AND 56, the idle inner electrodes 510 and 512 are retracted and their shut-off valves 524 and 526 are closed. In the illustrated embodiment, the idle inner electrodes 510 and 512 are disposed within an electrode cleaning or station 528. Some electrodes can be cleaned and others replaced within the station 528, optionally. The cleaning operations can involve chemical reaction or solvent treatment to remove deposits, milling to physically remove deposits, or plasma treatment to essentially burn away accumulated deposits, as non-limiting examples.
- the inner electrode 108 can be extended and partially retracted numerous times, as the vessel 80 is installed or removed from the vessel holder 50 at the station where the inner electrode 108 is in use
- each vessel 80 remains on its vessel holder such as 50 or 48 and an inner electrode such as 108 is inserted into each vessel as its vessel holder reaches the coating station.
- IV.A It should be understood that the movement of the array of inner electrodes can be independent of the movement of the vessel holders. They can be moved together or independently, to simultaneously or independently switch to a new vessel holder and/or a new inner electrode.
- IV.A An array of two or more inner electrodes 108, 510, and 512 is useful because the individual combined gas delivery tubes / inner electrodes 108, 510, and 512 will in some instances tend to accumulate polymerized reactant gases or some other type of deposits as they are used to coat a series of vessels such as 80. The deposits can accumulate to the point at which they detract from the coating rate or uniformity produced, which can be undesirable.
- the inner electrodes can be periodically removed from service, replaced or cleaned, and a new or cleaned electrode can be put into service. For example, going from FIG. 46 to FIG. 48, the inner electrode 108 has been replaced with a fresh or reconditioned inner electrode 510, which is ready to be extended into the vessel holder 48 and the vessel 80 to apply an interior coating to the new vessel.
- an inner electrode drive 530 is operable in conjunction with the inner electrode extender and retractor 514 for removing a first inner electrode 108 from its extended position to its retracted position, substituting a second inner electrode 510 for the first inner electrode 108, and advancing the second inner electrode 510 to its extended position (analogous to FIGS. 46 and 56 except for the substitution of electrode).
- FIGS. 46-48 and inner electrode drive 530 are usable, for example, with the embodiments of FIGS. 1 , 2, 3, 8, 9, 12-16, 18-19, 21 -22, 26-28, 33-35, 37-45, 49, and 52-54.
- the extending and retracting mechanism 514 of FIGS. 46-48 is usable, for example, with the gas delivery tube embodiments of FIGS. 2, 3, 8, 9, 12-16, 18-19, 21 -22, 26-28, 33-35, 37-45, 49, and 52- 54, as well as with the probes of the vessel inspection apparatus of FIGS. 6 and 7.
- the electrode 160 shown in FIG. 2 can be shaped like a "U" channel with its length into the page and the puck or vessel holder 50 can move through the activated (powered) electrode during the treatment/coating process. Note that since external and internal electrodes are used, this apparatus can employ a frequency between 50 Hz and 1 GHz applied from a power supply 162 to the U channel electrode 160.
- the probe 108 can be grounded to complete the electrical circuit, allowing current to flow through the low-pressure gas(es) inside of the vessel 80. The current creates plasma to allow the selective treatment and/or coating of the interior surface 88 of the device.
- the electrode in FIG. 2 can also be powered by a pulsed power supply. Pulsing allows for depletion of reactive gases and then removal of by-products prior to activation and depletion (again) of the reactive gases. Pulsed power systems are typically characterized by their duty cycle which determines the amount of time that the electric field (and therefore the plasma) is present. The power-on time is relative to the power-off time. For example a duty cycle of 10% can correspond to a power on time of 10% of a cycle where the power was off for 90% of the time. As a specific example, the power might be on for 0.1 second and off for 1 second. Pulsed power systems reduce the effective power input for a given power supply 162, since the off-time results in increased processing time.
- the resulting coating can be very pure (no by products or contaminants).
- ALD atomic layer deposition
- the duty cycle can be adjusted so that the power-on time results in the deposition of a single layer of a desired material.
- a single atomic layer is contemplated to be deposited in each cycle.
- This approach can result in highly pure and highly structured coatings (although at the temperatures required for deposition on polymeric surfaces, temperatures preferably are kept low ( ⁇ 100 Q C) and the low-temperature coatings can be amorphous).
- FIG. 12 An alternative coating station is disclosed in FIG. 12, employing a microwave cavity instead of an outer electrode.
- the energy applied can be a microwave frequency, for example 2.45 GHz.
- FIGS. 15 and 16 show apparatus generally indicated at 202 for PECVD treatment of a first vessel 80 having an open end 82, a closed end 84, and an interior space defined by the surface 88.
- This embodiment includes a vessel holder 48, at least a first gripper 204 (in this embodiment, for example, a suction cup), a seat defined by the vessel port 92 on the vessel holder 48, a reactant supply 144, a plasma generator represented by the electrodes 108 and 160, a vessel release, which can be a vent valve such as 534, and either the same gripper 204 or a second one (in effect, optionally a second gripper 204).
- a first gripper 204 in this embodiment, for example, a suction cup
- a seat defined by the vessel port 92 on the vessel holder 48
- a reactant supply 144 represented by the electrodes 108 and 160
- a vessel release which can be a vent valve such as 534, and either the same gripper 204 or a second one (in effect, optionally a second gripper 204).
- the first gripper 204 and as illustrated any of the grippers 204, is configured for selectively holding and releasing the closed end 84 of a vessel 80. While gripping the closed end 84 of the vessel, the first gripper 204 can transport the vessel to the vicinity of the vessel holder 48. In the illustrated embodiment, the transportation function is facilitated by a series conveyor 538 to which the grippers 204 are attached in a series.
- the vessel holder 48 has previously been described in connection with other embodiments, and is configured for seating to the open end 82 of a vessel 80.
- the seat defined by the vessel port 92 has previously been described in connection with other embodiments, and is configured for establishing sealed communication between the vessel holder 48 and the interior space 88 of the first vessel, and in this case any of the vessels 80.
- the reactant supply 144 has previously been described in connection with other embodiments, and is operatively connected for introducing at least one gaseous reactant within the first vessel 80 through the vessel holder 48.
- the plasma generator defined by the electrodes 108 and 160 has previously been described in connection with other embodiments, and is configured for forming plasma within the first vessel under conditions effective to form a reaction product of the reactant on the interior surface of the first vessel.
- the vessel release 534 or other expedients such as introducing within the seated vessel 80 a reactant gas, a carrier gas, or an inexpensive gas such as compressed nitrogen or air, can be used for unseating the first vessel 80 from the vessel holder 48.
- FIGS. 15 and 16 also show a method of PECVD treatment of a first vessel, comprising several steps.
- a first vessel 80 is provided having an open end 82, a closed end 84, and an interior surface 88.
- At least a first gripper 204 is provided that is configured for selectively holding and releasing the closed end 84 of the first vessel 80.
- the closed end 84 of the first vessel 80 is gripped with the first gripper 204 and thereby transported to the vicinity of a vessel holder 48 configured for seating to the open end of the first vessel.
- a vessel holder 48 configured for seating to the open end of the first vessel.
- two vessel holders 48 are provided, allowing the vessels 80 to be advanced and seated on the vessel holders 48 two at a time, thus doubling the effective production rate.
- the first gripper 204 is used for axially advancing the first vessel 80 and seating its open end 82 on the vessel holder 48, establishing sealed communication between the vessel holder 48 and the interior of the first vessel.
- at least one gaseous reactant is introduced within the first vessel through the vessel holder, optionally as explained for previous embodiments.
- plasma is formed within the first vessel under conditions effective to form a reaction product of the reactant on the interior surface of the first vessel, optionally as explained for previous embodiments.
- the first vessel is unseated from the vessel holder, optionally as explained for previous embodiments.
- the first gripper or another gripper is used, optionally as explained for previous embodiments, to axially transport the first vessel away from the vessel holder.
- the first vessel can then be released from the gripper used to axially transport it away from the vessel holder, optionally as explained for previous embodiments.
- FIG. 1 Further optional steps that can be carried out according to this method include providing a reaction vessel different from the first vessel, the reaction vessel having an open end and an interior space, and seating the open end of the reaction vessel on the vessel holder, establishing sealed communication between the vessel holder and the interior space of the reaction vessel.
- a PECVD reactant conduit can be provided within the interior space.
- Plasma can be formed within the interior space of the reaction vessel under conditions effective to remove at least a portion of a deposit of a PECVD reaction product from the reactant conduit.
- FIG. 16 is an example of using a suction cup type device to hold the end of a sample collection tube (in this example) that can move through a production line/system.
- the specific example shown here is one possible step (of many possible steps as outlined above and below) of coating/treatment.
- the tube can move into the coating step/area and the tube can be lowered into the vessel holder and (in this example) the cylindrical electrode.
- the vessel holder, sample collection tube and suction cup can then move together to the next step where the electrode is powered and the treatment/coating take place. Any of the above types of electrodes can be utilized in this example.
- FIGS. 15 and 16 show a vessel holder 48 in a coating station 28 similar to FIG. 13, employing a vessel transport generally indicated as 202 to move the vessel 80 to and from the coating station 28.
- the vessel transport 202 can be provided with a grip 204, which in the illustrated transport 202 can be a suction cup.
- An adhesive pad, active vacuum source (with a pump to draw air from the grip, actively creating a vacuum) or other expedient can also be employed as the grip.
- the vessel transport 202 can be used, for example, to lower the vessel 80 into a seated position in the vessel port 92 to position the vessel 80 for coating.
- the vessel transport 202 can also be used to lift the vessel 80 away from the vessel port 92 after processing at the station 28 can be complete.
- the vessel transport 202 also can be used to seat the vessel 80 before the vessel 80 and vessel transport 48 are advanced together to a station.
- the vessel transport can also be used to urge the vessel 80 against its seat on the vessel port 92.
- FIG. 15 can be oriented to show vertical lifting of the vessel 80 from above, an inverted orientation can be or contemplated in which the vessel transport 202 is below the vessel 80 and supports it from beneath.
- FIG. 16 shows an embodiment of a method in which vessel transports 202 such as suction cups 204 convey the vessels 80 horizontally, as from one station to the next, as well as (or instead of) vertically into and out of a station such as 28.
- the vessels 80 can be lifted and transported in any orientation.
- FIG. 16 thus represents a method of PECVD treatment of a first vessel 80, comprising several steps.
- the outer electrode 160 can be generally cylindrical with open ends, and can be stationary.
- the vessel 80 can be advanced through the outer electrode 160 until the opening 82 is seated on the vessel port 96.
- the probe 108 optionally can be permanently molded or otherwise secured into the gas inlet port 104, as opposed to a wiping seal allowing relative motion between the port 104 and the probe 108.
- FIG. 14 shows an additional alternative for coupling electrical energy into the plasma at 50Hz - 1 GHz.
- This can consist of a coil that can be either lowered into position or the vessel holder (with device) can be pushed up into position.
- Coiled electrodes are referred to as inductive coupling devices and can impart a magnetic component to the inside of the device where the plasma can be created.
- a probe 108 can still be used as discussed in FIG. 2 and FIG. 13. Other aspects of the vessel holder or vessel holder 48 discussed above can remain the same.
- a reaction vessel 532 different from the first vessel 80 can be provided, also having an open end 540 and an interior space defined by the interior surface 542. Like the vessels 80, the reaction vessel 532 can have its open end 540 on the vessel holder 48 and establish sealed communication between the vessel holder 48 and the interior space 542 of the reaction vessel.
- FIG. 49 is a view similar to FIG. 16 showing a mechanism for delivering vessels 80 to be treated and a cleaning reactor 532 to a PECVD coating apparatus.
- the inner electrode 108 optionally can be cleaned without removing it from the vessel holder 48.
- FIG. 49 shows that the PECVD reactant conduit 108 as previously described is positioned to be located within the interior space 542 of the reaction vessel 532 when the reaction vessel is seated on the vessel holder 48 in place of a vessel 80 which is provided for coating as described previously.
- FIG. 49 shows the reactant conduit 108 in this configuration, even though the conduit 108 has an exterior portion, as well as an interior distal end. It suffices for this purpose and the present claims if the reactant conduit 108 extends at least partially into the vessel 80 or 532.
- FIG. 49 The mechanism of FIG. 49 as illustrated is usable with the embodiments of at least FIGS. 1 and 15-16, for example.
- the cleaning reactor 532 can also be provided as a simple vessel seated and transported on a vessel holder such as 48, in an alternative embodiment. In this configuration, the cleaning reactor 532 can be used with the apparatus of at least FIGS. 1 -3, 8, 9, 12-15, 18, 19, 21 , 22, 26-28, 33-35, 37-48, and 52-54, for example.
- the plasma generator defined by the electrodes 108 and 160 is configurable for forming plasma within the interior space of the reaction vessel 532 under conditions effective to remove at least a portion of a deposit of a PECVD reaction product from the reactant conduit 108.
- the inner electrode and gas source 108 can be a conductive tube, for example a metallic tube, and that the reaction vessel 532 can be made of any suitable, preferably heat-resistant material such as ceramic, quartz, glass or other materials that can withstand more heat than a thermoplastic vessel.
- the material of the reaction vessel 532 also can desirably be chemical or plasma resistant to the conditions used in the reaction vessel to remove deposits of reaction products.
- the reaction vessel 532 can be made of electrically conductive material and itself serve as a special-purpose outer electrode for the purpose of removing deposits from the reactant conduit 108.
- the reaction vessel 532 can be configured as a cap that seats on the outer electrode 160, in which case the outer electrode 160 would preferably be seated on the vessel holder 48 to define a closed cleaning reaction chamber.
- reaction conditions effective to remove at least a portion of a deposit of a PECVD reaction product from the reactant conduit 108 include introduction of a substantial portion of an oxidizing reactant such as oxygen or ozone (either generated separately or by the plasma apparatus), a higher power level than is used for deposition of coatings, a longer cycle time than is used for deposition of coatings, or other expedients known for removing the type of unwanted deposit encountered on the reaction conduit 108.
- an oxidizing reactant such as oxygen or ozone (either generated separately or by the plasma apparatus)
- a higher power level than is used for deposition of coatings a longer cycle time than is used for deposition of coatings
- other expedients known for removing the type of unwanted deposit encountered on the reaction conduit 108 for another example, mechanical milling can also be used to remove unwanted deposits.
- solvents or other agents can be forced through the reactant conduit 108 to clear obstructions.
- the precursor for the PECVD coating of the present invention is broadly defined as an organometallic precursor.
- An organometallic precursor is defined for all purposes in this specification as comprehending compounds of metal elements from Group III and/or Group IV of the Periodic Table having organic residues, e.g. hydrocarbon, aminocarbon or oxycarbon residues.
- Organometallic compounds as presently defined include any precursor having organic moieties bonded to silicon or other Group III/ IV metal atoms directly, or optionally bonded through oxygen or nitrogen atoms.
- the relevant elements of Group III of the Periodic Table are Boron, Aluminum, Gallium, Indium, Thallium, Scandium, Yttrium, and Lanthanum, Aluminum and Boron being preferred.
- Group IV of the Periodic Table are Silicon, Germanium, Tin, Lead, Titanium, Zirconium, Hafnium, and Thorium, Silicon and Tin being preferred. Other volatile organic compounds may also be contemplated. However, organosilicon compounds are preferred for performing present invention.
- organosilicon precursor is preferred, where an "organosilicon precursor" is defined throughout this specification most broadly as a compound having at least one of the linkages:
- the first structure immediately above is a tetravalent silicon atom connected to an oxygen atom and an organic carbon atom (an organic carbon atom being a carbon atom bonded to at least one hydrogen atom).
- the second structure immediately above is a tetravalent silicon atom connected to an -NH- linkage and an organic carbon atom (an organic carbon atom being a carbon atom bonded to at least one hydrogen atom).
- the organosilicon precursor is selected from the group consisting of a linear siloxane, a monocyclic siloxane, a polycyclic siloxane, a polysilsesquioxane, a linear silazane, a monocyclic silazane, a polycyclic silazane, a polysilsesquiazane, and a combination of any two or more of these precursors.
- a precursor though not within the two formulas immediately above, is an alkyl trimethoxysilane. If an oxygen-containing precursor (e.g.
- a representative predicted empirical formula resulting from PECVD under conditions forming a hydrophobic or lubricating coating would be Si w 0 ⁇ C y H z , where w is 1 , x for this formula is from about 0.5 to about 1 , y is from about 2 to about 3, and z is from 6 to about 9, while a representative predicted empirical composition resulting from PECVD under conditions forming a barrier coating would be SiO x , where x in this formula is from about 1.5 to about 2.9.
- a nitrogen-containing precursor e.g. a silazane
- the predicted composition would be Si w *N x *C y *H z *, i.e.
- Si w 0 ⁇ C y H z in Si w 0 ⁇ C y H z according to the present invention O is replaced by N and the indices are adapted to the higher valency of N as compared to O (3 instead of 2).
- the latter adaptation will generally follow the ratio of w, x, y and z in a siloxane to the corresponding indices in its aza counterpart.
- Si w *N x *CyH z * in which w * , x * , y * , and z * are defined the same as for the siloxane counterparts, but for an optional deviation in the number of hydrogens.
- One type of precursor starting material having the above empirical formula is a linear siloxane, for example a material having the following formula:
- each R is independently selected from alkyl, for example methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, vinyl, alkyne, or others, and n is 1 , 2, 3, 4, or greater, preferably two or greater.
- alkyl for example methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, vinyl, alkyne, or others
- n is 1 , 2, 3, 4, or greater, preferably two or greater.
- HMDSO hexamethyldisiloxane
- analogous silazanes in which -NH- is substituted for the oxygen atom in the above structure are also useful for making analogous coatings.
- contemplated linear silazanes are octamethyltrisilazane, decamethyltetrasilazane, or combinations of two or more of these.
- V.C. Another type of precursor starting material is a monocyclic siloxane, for example a material having the following structural formula:
- R is defined as for the linear structure and "a" is from 3 to about 10, or the analogous monocyclic silazanes.
- a is from 3 to about 10
- contemplated hetero-substituted and unsubstituted monocyclic siloxanes and silazanes include
- V.C. Another type of precursor starting material is a polycyclic siloxane, for example a material having one of the following structural formulas:
- Y can be oxygen or nitrogen
- E is silicon
- Z is a hydrogen atom or an organic substituent, for example alkyl such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, vinyl, alkyne, or others.
- Y oxygen
- the respective structures from left to right, are a silatrane, a silquasilatrane, and a silproatrane.
- Y is nitrogen
- the respective structures are an azasilatrane, an azasilquasiatrane, and an azasilproatrane.
- V.C. Another type of polycyclic siloxane precursor starting material is a polysilsesquioxane, with the empirical formula RSiOi 5 and the structural formula:
- each R is a hydrogen atom or an organic substituent, for example alkyl such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, vinyl, alkyne, or others.
- alkyl such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, vinyl, alkyne, or others.
- SST-eM01 poly(methylsilsesquioxane) in which each R is methyl
- SST-3MH1.1 poly(Methyl-Hydridosilsesquioxane) in which 90% of the R groups are methyl, 10% are hydrogen atoms. This material is available in a 10% solution in tetrahydrofuran, for example. Combinations of two or more of these are also contemplated.
- a contemplated precursor examples include methylsilatrane, CAS No. 2288-13-3, in which each Y is oxygen and Z is methyl, methylazasilatrane, SST-eM01 poly(methylsilsesquioxane), in which each R optionally can be methyl, SST- 3MH1.1 poly(Methyl-Hydridosilsesquioxane), in which 90% of the R groups are methyl and 10% are hydrogen atoms, or a combination of any two or more of these.
- V.C The analogous polysilsesquiazanes in which -NH- is substituted for the oxygen atom in the above structure are also useful for making analogous coatings.
- contemplated polysilsesquiazanes are a poly(methylsilsesquiazane), in which each R is methyl, and a poly(Methyl-Hydridosilsesquiazane, in which 90% of the R groups are methyl, 10% are hydrogen atoms. Combinations of two or more of these are also contemplated.
- One particularly contemplated precursor for the lubricity coating according to the present invention is a monocyclic siloxane, for example is octamethylcyclotetrasiloxane.
- One particularly contemplated precursor for the hydrophobic coating according to the present invention is a monocyclic siloxane, for example is octamethylcyclotetrasiloxane.
- One particularly contemplated precursor for the barrier coating according to the present invention is a linear siloxane, for example is HMDSO.
- the applying step optionally can be carried out by vaporizing the precursor and providing it in the vicinity of the substrate.
- OMCTS is usually vaporized by heating it to about 50 °C before applying it to the PECVD apparatus.
- PECVD method In the context of the present invention, the following PECVD method is generally applied, which contains the following steps:
- a gaseous reactant comprising a precursor as defined herein, preferably an organosilicon precursor, and optionally O 2 in the vicinity of the substrate surface;
- the coating characteristics are advantageously set by one or more of the following conditions: the plasma properties, the pressure under which the plasma is applied, the power applied to generate the plasma, the presence and relative amount of O 2 in the gaseous reactant, the plasma volume, and the organosilicon precursor.
- the coating characteristics are set by the presence and relative amount of O 2 in the gaseous reactant and/or the power applied to generate the plasma.
- the plasma is in a preferred aspect a non-hollow-cathode plasma.
- the plasma is generated at reduced pressure (as compared to the ambient or atmospheric pressure).
- the reduced pressure is less than 300 mTorr, more preferably less than 200 mTorr, even more preferably less than 100 mTorr.
- the PECVD preferably is performed by energizing the gaseous reactant containing the precursor with electrodes powered at a frequency at microwave or radio frequency, and preferably at a radio frequency.
- the radio frequency preferred to perform an embodiment of the invention will also be addressed as "RF frequency".
- a typical radio frequency range for performing the present invention is a frequency of from 10 kHz to less than 300 MHz, more preferably of from 1 to 50 MHz, even more preferably of from 10 to 15 MHz.
- a frequency of 13.56 MHz is most preferred, this being a government sanctioned frequency for conducting PECVD work.
- RF operates a lower power, there is less heating of the substrate/vessel. Because the focus of the present invention is putting a plasma coating on plastic substrates, lower processing temperatures are desired to prevent melting/distortion of the substrate.
- the microwave PECVD is applied in short bursts, by pulsing the power. The power pulsing extends the cycle time for the coating, which is undesired in the present invention.
- the higher frequency microwave may also cause offgassing of volatile substances like residual water, oligomers and other materials in the plastic substrate. This offgassing may interfere with the PECVD coating.
- a major concern with using microwave for PECVD is delamination of the coating from the substrate. Delamination occurs because the microwaves change the surface of the substrate prior to depositing the coating layer.
- interface coating layers have been developed for microwave PECVD to achieve good bonding between the coating and the substrate. No such interface coating layer is needed with RF PECVD as there is no risk of delamination.
- the lubricity coating and hydrophobic coating according to the present invention are advantageously applied using lower power. RF power operates at lower power and provides more control over the PECVD process than microwave power. Nonetheless, microwave power, though less preferred, is usable under suitable process conditions.
- the power (in Watts) used to generate the plasma is the volume of the lumen wherein the plasma is generated.
- said lumen is the lumen of a vessel coated according to the present invention.
- the RF power should scale with the volume of the vessel if the same electrode system is employed.
- the power which has to be applied in order to achieve the same or a similar coating in a vessel of same geometry, but different size can easily be found.
- the influence of the vessel geometry on the power to be applied is illustrated by the results of the Examples for tubes in comparison to the Examples for syringe barrels.
- the plasma is generated with electrodes powered with sufficient power to form a coating on the substrate surface.
- the plasma is preferably generated (i) with electrodes supplied with an electric power of from 0.1 to 25 W, preferably from 1 to 22 W, more preferably from 3 to 17 W, even more preferably of from 5 to 14 W, most preferably of from 7 to 1 1 W, for example of 8 W; and/or (ii) wherein the ratio of the electrode power to the plasma volume is less than 10 W/ml, preferably is from 5 W/ml to 0.1 W/ml, more preferably is from 4 W/ml to 0.1 W/ml, most preferably from 2 W/ml to 0.2 W/ml.
- the plasma is preferably generated (i) with electrodes supplied with an electric power of from 8 to 500 W, preferably from 20 to 400 W, more preferably from 35 to 350 W, even more preferably of from 44 to 300 W, most preferably of from 44 to 70 W; and/or (ii) the ratio of the electrode power to the plasma volume is equal or more than 5 W/ml, preferably is from 6 W/ml to 150 W/ml, more preferably is from 7 W/ml to 100 W/ml, most preferably from 7 W/ml to 20 W/ml.
- the vessel geometry may also influence the choice of the gas inlet used for the PECVD coating.
- a syringe may be coated with an open tube inlet, and a tube may be coated with a gas inlet having small holes which is extended into the tube.
- the power (in Watts) used for PECVD also has an influence on the coating properties. Typically, an increase of the power will increase the barrier properties of the coating, and a decrease of the power will increase the lubricity and hydrophobicity of the coating.
- a power of less than 30 W will lead to a coating which is predominantly a barrier coating, while a power of more than 30 W will lead to a coating which is predominantly a lubricity coating (see Examples).
- a further parameter determining the coating properties is the ratio of O 2 (or another oxidizing agent) to the precursor (e.g. organosilicon precursor) in the gaseous reactant used for generating the plasma.
- O 2 or another oxidizing agent
- the precursor e.g. organosilicon precursor
- an increase of the O 2 content in the gaseous reactant will increase the barrier properties of the coating, and a decrease of the O 2 content will increase the lubricity and hydrophobicity of the coating.
- the PECVD coating method of present invention can be used for setting the lubricity properties of a coating, the hydrophobicity properties of a coating, and the barrier properties of a coating prepared by said method.
- O 2 is preferably present in a volume- volume ratio to the gaseous reactant of from 0:1 to 5:1 , more preferably from 0:1 to 1 :1 , even more preferably from 0:1 to 0.5:1 or even from 0:1 to 0.1 :1.
- the gaseous reactant should comprise less than 1 vol% O 2 , more particularly less than 0.5 vol% O 2 , and most preferably is O 2 -free. The same applies to a hydrophobic coating.
- the O 2 is preferably present in a volume:volume ratio to the gaseous reactant of from 1 : 1 to 100 : 1 in relation to the silicon containing precursor, preferably in a ratio of from 5 : 1 to 30 : 1 , more preferably in a ratio of from 10 : 1 to 20 : 1 , even more preferably in a ratio of 15 : 1.
- V.A. PECVD to apply SiO x barrier coating, using plasma that is substantially free of hollow cathode plasma
- V.A. A specific embodiment is a method of applying a barrier coating of SiO x , defined in this specification (unless otherwise specified in a particular instance) as a coating containing silicon, oxygen, and optionally other elements, in which x, the ratio of oxygen to silicon atoms, is from about 1.5 to about 2.9, or 1.5 to about 2.6, or about 2. These alternative definitions of x apply to any use of the term SiO x in this specification.
- the barrier coating is applied to the interior of a vessel, for example a sample collection tube, a syringe barrel, or another type of vessel. The method includes several steps.
- V.A A vessel wall is provided, as is a reaction mixture comprising plasma forming gas, i.e. an organosilicon compound gas, optionally an oxidizing gas, and optionally a hydrocarbon gas.
- plasma forming gas i.e. an organosilicon compound gas, optionally an oxidizing gas, and optionally a hydrocarbon gas.
- V.A. Plasma is formed in the reaction mixture that is substantially free of hollow cathode plasma.
- the vessel wall is contacted with the reaction mixture, and the coating of SiO x is deposited on at least a portion of the vessel wall.
- V.A the generation of a uniform plasma throughout the portion of the vessel to be coated is preferred, as it has been found in certain instances to generate an SiO x coating providing a better barrier against oxygen.
- Uniform plasma means regular plasma that does not include a substantial amount of hollow cathode plasma (which has a higher emission intensity than regular plasma and is manifested as a localized area of higher intensity interrupting the more uniform intensity of the regular plasma).
- V.A The hollow cathode effect is generated by a pair of conductive surfaces opposing each other with the same negative potential with respect to a common anode. If the spacing is made (depending on the pressure and gas type) such that the space charge sheaths overlap, electrons start to oscillate between the reflecting potentials of the opposite wall sheaths leading to multiple collisions as the electrons are accelerated by the potential gradient across the sheath region. The electrons are confined in the space charge sheath overlap which results in very high ionization and high ion density plasmas. This phenomenon is described as the hollow cathode effect. Those skilled in the art are able to vary the processing conditions, such as the power level and the feed rates or pressure of the gases, to form uniform plasma throughout or to form plasma including various degrees of hollow cathode plasma.
- microwave energy can be used to generate the plasma in a PECVD process.
- the processing conditions may be different, however, as microwave energy applied to a thermoplastic vessel will excite (vibrate) water molecules. Since there is a small amount of water in all plastic materials, the microwaves will heat the plastic. As the plastic heats, the large driving force created by the vacuum inside of the device relative to atmospheric pressure outside the device will pull free or easily desorb materials to the interior surface 88 where they will either become volatile or will be weakly bound to the surface. The weakly bound materials will then create an interface that can hinder subsequent coatings (deposited from the plasma) from adhering to the plastic interior surface 88 of the device.
- V.A As one way to negate this coating hindering effect, a coating can be deposited at very low power (in the example above 5 to 20 Watts at 2.45 GHz) creating a cap onto which subsequent coatings can adhere. This results in a two-step coating process (and two coating layers).
- the initial gas flows for the capping layer
- the capping layer can be changed to 2 seem ("standard cubic centimeters per minute") HMDSO and 20 seem oxygen with a process power of 5 to 20 Watts for approximately 2-10 seconds.
- the gases can be adjusted to the flows in the example above and the power level increased to, e.g., 35 to 50 W, so that an SiO x coating, in which x in this formula is from about 1.5 to about 2.9, alternatively from about 1.5 to about 2.6, alternatively about 2, can be deposited.
- the capping layer might provide little to no functionality in certain embodiments, except to stop materials from migrating to the vessel interior surface 88 during the higher power SiO x coating deposition.
- migration of easily desorbed materials in the device walls typically is not an issue at lower frequencies such as most of the RF range, since the lower frequencies do not excite (vibrate) molecular species. [557] V.A.
- the vessel 80 can be dried to remove embedded water before applying microwave energy. Desiccation or drying of the vessel 80 can be accomplished, for example, by thermally heating the vessel 80, as by using an electric heater or forced air heating. Desiccation or drying of the vessel 80 also can be accomplished by exposing the interior of the vessel 80, or gas contacting the interior of the vessel 80, to a desiccant. Other expedients for drying the vessel, such as vacuum drying, can also be used. These expedients can be carried out in one or more of the stations or devices illustrated or by a separate station or device.
- FIGS. 26 and 27 show a method and apparatus generally indicated at 290 for coating an inner surface 292 of a restricted opening 294 of a generally tubular vessel 250 to be processed, for example the restricted front opening 294 of a syringe barrel 250, by PECVD.
- the previously described process is modified by connecting the restricted opening 294 to a processing vessel 296 and optionally making certain other modifications.
- the generally tubular vessel 250 to be processed includes an outer surface 298, an inner or interior surface 254 defining a lumen 300, a larger opening 302 having an inner diameter, and a restricted opening 294 that is defined by an inner surface 292 and has an inner diameter smaller than the inner diameter of the larger opening 302.
- the processing vessel 296 has a lumen 304 and a processing vessel opening 306, which optionally is the only opening, although in other embodiments a second opening can be provided that optionally is closed off during processing.
- the processing vessel opening 306 is connected with the restricted opening 294 of the vessel 250 to be processed to establish communication between the lumen 300 of the vessel 250 to be processed and the processing vessel lumen via the restricted opening 294.
- V.B At least a partial vacuum is drawn within the lumen 300 of the vessel 250 to be processed and lumen 304 of the processing vessel 296.
- a PECVD reactant is flowed from the gas source 144 (see FIG. 7) through the first opening 302, then through the lumen 300 of the vessel 250 to be processed, then through the restricted opening 294, then into the lumen 304 of the processing vessel 296.
- the PECVD reactant can be introduced through the larger opening 302 of the vessel 250 by providing a generally tubular inner electrode 308 having an interior passage 310, a proximal end 312, a distal end 314, and a distal opening 316, in an alternative embodiment multiple distal openings can be provided adjacent to the distal end 314 and communicating with the interior passage 310.
- the distal end of the electrode 308 can be placed adjacent to or into the larger opening 302 of the vessel 250 to be processed.
- a reactant gas can be fed through the distal opening 316 of the electrode 308 into the lumen 300 of the vessel 250 to be processed.
- the reactant will flow through the restricted opening 294, then into the lumen 304, to the extent the PECVD reactant is provided at a higher pressure than the vacuum initially drawn before introducing the PECVD reactant.
- V.B. Plasma 318 is generated adjacent to the restricted opening 294 under conditions effective to deposit a coating of a PECVD reaction product on the inner surface 292 of the restricted opening 294.
- the plasma is generated by feeding RF energy to the generally U-shaped outer electrode 160 and grounding the inner electrode 308.
- the feed and ground connections to the electrodes could also be reversed, though this reversal can introduce complexity if the vessel 250 to be processed, and thus also the inner electrode 308, are moving through the U-shaped outer electrode while the plasma is being generated.
- the plasma 318 generated in the vessel 250 during at least a portion of processing can include hollow cathode plasma generated inside the restricted opening 294 and/or the processing vessel lumen 304.
- the generation of hollow cathode plasma 318 can contribute to the ability to successfully apply a barrier coating at the restricted opening 294, although the invention is not limited according to the accuracy or applicability of this theory of operation.
- the processing can be carried out partially under conditions generating a uniform plasma throughout the vessel 250 and the gas inlet, and partially under conditions generating a hollow cathode plasma, for example adjacent to the restricted opening 294.
- the process is desirably operated under such conditions, as explained here and shown in the drawings, that the plasma 318 extends substantially throughout the syringe lumen 300 and the restricted opening 294.
- the plasma 318 also desirably extends substantially throughout the syringe lumen 300, the restricted opening 294, and the lumen 304 of the processing vessel 296. This assumes that a uniform coating of the interior 254 of the vessel 250 is desired. In other embodiments non-uniform plasma can be desired.
- the plasma 318 have a substantially uniform color throughout the syringe lumen 300 and the restricted opening 294 during processing, and preferably a substantially uniform color substantially throughout the syringe lumen 300, the restricted opening 294, and the lumen 304 of the processing vessel 296.
- the plasma desirably is substantially stable throughout the syringe lumen 300 and the restricted opening 294, and preferably also throughout the lumen 304 of the processing vessel 296.
- the restricted opening 294 has a first fitting 332 and the processing vessel opening 306 has a second fitting 334 adapted to seat to the first fitting 332 to establish communication between the lumen 304 of the processing vessel 296 and the lumen 300 of the vessel 250 to be processed.
- the first and second fittings are male and female Luer lock fittings 332 and 334, respectively integral with the structure defining the restricted opening 294 and the processing vessel opening 306.
- One of the fittings in this case the male Luer lock fitting 332, comprises a locking collar 336 with a threaded inner surface and defining an axially facing, generally annular first abutment 338 and the other fitting 334 comprises an axially facing, generally annular second abutment 340 facing the first abutment 338 when the fittings 332 and 334 are engaged.
- a seal for example an O-ring 342 can be positioned between the first and second fittings 332 and 334.
- an annular seal can be engaged between the first and second abutments 338 and 340.
- the female Luer fitting 334 also includes dogs 344 that engage the threaded inner surface of the locking collar 336 to capture the O-ring 342 between the first and second fittings 332 and 334.
- the communication established between the lumen 300 of the vessel 250 to be processed and the lumen 304 of the processing vessel 296 via the restricted opening 294 is at least substantially leak proof.
- Luer lock fittings 332 and 334 can be made of electrically conductive material, for example stainless steel. This construction material forming or adjacent to the restricted opening 294 might contribute to formation of the plasma in the restricted opening 294.
- the desirable volume of the lumen 304 of the processing vessel 296 is contemplated to be a trade-off between a small volume that will not divert much of the reactant flow away from the product surfaces desired to be coated and a large volume that will support a generous reactant gas flow rate through the restricted opening 294 before filling the lumen 304 sufficiently to reduce that flow rate to a less desirable value (by reducing the pressure difference across the restricted opening 294).
- the contemplated volume of the lumen 304 in an embodiment, is less than three times the volume of the lumen 300 of the vessel 250 to be processed, or less than two times the volume of the lumen 300 of the vessel 250 to be processed, or less than the volume of the lumen 300 of the vessel 250 to be processed, or less than 50% of the volume of the lumen 300 of the vessel 250 to be processed, or less than 25% of the volume of the lumen 300 of the vessel 250 to be processed.
- Other effective relationships of the volumes of the respective lumens are also contemplated.
- the uniformity of coating can be improved in certain embodiments by repositioning the distal end of the electrode 308 relative to the vessel 250 so it does not penetrate as far into the lumen 300 of the vessel 250 as the position of the inner electrode shown in previous Figures.
- the distal opening 316 can be positioned adjacent to the restricted opening 294, in other embodiments the distal opening 316 can be positioned less than 7/8 the distance, optionally less than 3 A the distance, optionally less than half the distance to the restricted opening 294 from the larger opening 302 of the vessel to be processed while feeding the reactant gas.
- the distal opening 316 can be positioned less than 40%, less than 30%, less than 20%, less than 15%, less than 10%, less than 8%, less than 6%, less than 4%, less than 2%, or less than 1 % of the distance to the restricted opening 294 from the larger opening of the vessel to be processed while feeding the reactant gas.
- the distal end of the electrode 308 can be positioned either slightly inside or outside or flush with the larger opening 302 of the vessel 250 to be processed while communicating with, and feeding the reactant gas to, the interior of the vessel 250.
- the positioning of the distal opening 316 relative to the vessel 250 to be processed can be optimized for particular dimensions and other conditions of treatment by testing it at various positions.
- One particular position of the electrode 308 contemplated for treating syringe barrels 250 is with the distal end 314 penetrating about a quarter inch (about 6 mm) into the vessel lumen 300 above the larger opening 302.
- the inventors presently contemplate that it is advantageous to place at least the distal end 314 of the electrode 308 within the vessel 250 so it will function suitably as an electrode, though that is not necessarily a requirement.
- the plasma 318 generated in the vessel 250 can be made more uniform, extending through the restricted opening 294 into the processing vessel lumen 304, with less penetration of the electrode 308 into the lumen 300 than has previously been employed.
- the distal end 314 of the electrode 308 commonly is placed closer to the closed end of the vessel than to its entrance.
- the distal end 314 of the electrode 308 can be positioned at the restricted opening 294 or beyond the restricted opening 294, for example within the processing vessel lumen 304, as illustrated for example in FIG. 33.
- Various expedients can optionally be provided, such as shaping the processing vessel 296 to improve the gas flow through the restricted opening 294.
- the composite inner electrode and gas supply tube 398 can have distal gas supply openings such as 400, optionally located near the larger opening 302, and an extension electrode 402 extending distal of the distal gas supply openings 400, optionally extending to a distal end adjacent to the restricted opening 294, and optionally further extending into the processing vessel 324.
- This construction is contemplated to facilitate formation of plasma within the inner surface 292 adjacent to the restricted opening 294.
- the inner electrode 308, as in FIG. 26, can be moved during processing, for example, at first extending into the processing vessel lumen 304, then being withdrawn progressively proximally as the process proceeds.
- This expedient is particularly contemplated if the vessel 250, under the selected processing conditions, is long, and movement of the inner electrode facilitates more uniform treatment of the interior surface 254.
- the processing conditions such as the gas feed rate, the vacuum draw rate, the electrical energy applied to the outer electrode 160, the rate of withdrawing the inner electrode 308, or other factors can be varied as the process proceeds, customizing the process to different parts of a vessel to be treated.
- the larger opening of the generally tubular vessel 250 to be processed can be placed on a vessel support 320, as by seating the larger opening 302 of the vessel 250 to be processed on a port 322 of the vessel support 320. Then the inner electrode 308 can be positioned within the vessel 250 seated on the vessel support 320 before drawing at least a partial vacuum within the lumen 300 of the vessel 250 to be processed.
- the processing vessel 324 can be provided in the form of a conduit having a first opening 306 secured to the vessel 250 to be processed, as shown in FIG. 26, and a second opening 328 communicating with a vacuum port 330 in the vessel support 320.
- the PECVD process gases can flow into the vessel 250, then via the restricted opening 294 into the processing vessel 324, then return via the vacuum port 330.
- the vessel 250 can be evacuated through both openings 294 and 302 before applying the PECVD reactants.
- an uncapped syringe barrel 250 can be provided with an interior coating of SiO x , in which x in this formula is from about 1.5 to about 2.9, alternatively from about 1.5 to about 2.6, alternatively about 2, barrier or other type of PECVD coating by introducing the reactants from the source 144 through the opening at the back end 256 of the barrel 250 and drawing a vacuum using the vacuum source 98 drawing through the opening at the front end 260 of the barrel.
- the vacuum source 98 can be connected through a second fitting 266 seated on the front end 260 of the syringe barrel 250.
- the reactants can flow through the barrel 250 in a single direction (upward as shown in FIG. 22, though the orientation is not critical), and there is no need to convey the reactants through a probe that separates the fed gas from the exhausted gas within the syringe barrel 250.
- the front and back ends 260 and 256 of the syringe barrel 250 can also be reversed relative to the coating apparatus, in an alternative arrangement.
- the probe 108 can act simply as an electrode, and can either be tubular or a solid rod in this embodiment. As before, the separation between the interior surface 254 and the probe 108 can be uniform over at least most of the length of the syringe barrel 250.
- FIG. 37 is a view similar to FIG. 22 showing another embodiment in which the fitting 266 is independent of and not attached to the plate electrodes 414 and 416.
- the fitting 266 can have a Luer lock fitting adapted to be secured to the corresponding fitting of the syringe barrel 250. This embodiment allows the vacuum conduit 418 to pass over the electrode 416 while the vessel holder 420 and attached vessel 250 move between the electrodes 414 and 416 during a coating step.
- FIG. 38 is a view similar to FIG. 22 showing still another embodiment in which the front end 260 of the syringe barrel 250 is open and the syringe barrel 250 is enclosed by a vacuum chamber 422 seated on the vessel holder 424.
- the pressures P1 within the syringe barrel 250 and within the vacuum chamber 422 are approximately identical, and the vacuum in the vacuum chamber 422 optionally is drawn through the front end 260 of the syringe barrel 250.
- the process gases flow into the syringe barrel 250, they flow through the front end 260 of the syringe barrel 250 until a steady composition is provided within the syringe barrel 250, at which time the electrode 160 is energized to form the coating.
- FIG. 39 is a view similar to FIG. 22 showing yet another embodiment in which the back flange of the syringe barrel 250 is clamped between a vessel holder 428 and an electrode assembly 430 to which a cylindrical electrode or pair of plate electrodes indicated as 160 and a vacuum source 98 are secured.
- the volume generally indicated as 432 enclosed outside the syringe barrel 250 is relatively small in this embodiment to minimize the pumping needed to evacuate the volume 432 and the interior of the syringe barrel 250 to operate the PECVD process.
- FIG. 40 is a view similar to FIG. 22 and FIG. 41 is a plan view showing even another embodiment as an alternative to FIG. 38 in which the ratio of pressures P1/P2 is maintained at a desired level by providing a pressure proportioning valve 434.
- P1 can be a lower vacuum, i.e. a higher pressure, than P2 during a PECVD process so the waste process gases and by-products will pass through the front end 260 of the syringe barrel 250 and be exhausted.
- the provision of a separate vacuum chamber conduit 436 to serve the vacuum chamber 422 allows the use of a separate vacuum pump to evacuate the greater enclosed volume 432 more quickly.
- FIG. 41 is a plan view of the embodiment of FIG. 40, also showing the electrode 160 removed from FIG. 40.
- V.C. Another embodiment is a method of applying a lubricity coating derived from an organosilicon precursor.
- a "lubricity coating” or any similar term is generally defined as a coating that reduces the frictional resistance of the coated surface, relative to the uncoated surface. If the coated object is a syringe (or syringe part, e.g. syringe barrel) or any other item generally containing a plunger or movable part in sliding contact with the coated surface, the frictional resistance has two main aspects - breakout force and plunger sliding force.
- the plunger sliding force test is a specialized test of the coefficient of sliding friction of the plunger within a syringe, accounting for the fact that the normal force associated with a coefficient of sliding friction as usually measured on a flat surface is addressed by standardizing the fit between the plunger or other sliding element and the tube or other vessel within which it slides.
- the parallel force associated with a coefficient of sliding friction as usually measured is comparable to the plunger sliding force measured as described in this specification.
- Plunger sliding force can be measured, for example, as provided in the ISO 7886-1 :1993 test.
- the plunger sliding force test can also be adapted to measure other types of frictional resistance, for example the friction retaining a stopper within a tube, by suitable variations on the apparatus and procedure.
- the plunger can be replaced by a closure and the withdrawing force to remove or insert the closure can be measured as the counterpart of plunger sliding force.
- thebreakout force can be measured.
- the breakout force is the force required to start a stationary plunger moving within a syringe barrel, or the comparable force required to unseat a seated, stationary closure and begin its movement.
- the breakout force is measured by applying a force to the plunger that starts at zero or a low value and increases until the plunger begins moving.
- the breakout force tends to increase with storage of a syringe, after the prefilled syringe plunger has pushed away the intervening lubricant or adhered to the barrel due to decomposition of the lubricant between the plunger and the barrel.
- the breakout force is the force needed to overcome "sticktion," an industry term for the adhesion between the plunger and barrel that needs to be overcome to break out the plunger and allow it to begin moving.
- V.C Some utilities of coating a vessel in whole or in part with a lubricity coating, such as selectively at surfaces contacted in sliding relation to other parts, is to ease the insertion or removal of a stopper or passage of a sliding element such as a piston in a syringe or a stopper in a sample tube.
- the vessel can be made of glass or a polymer material such as polyester, for example polyethylene terephthalate (PET), a cyclic olefin copolymer (COC), an olefin such as polypropylene, or other materials.
- Applying a lubricity coating by PECVD can avoid or reduce the need to coat the vessel wall or closure with a sprayed, dipped, or otherwise applied organosilicon or other lubricant that commonly is applied in a far larger quantity than would be deposited by a PECVD process.
- V.C In any of the above embodiments V.C, a plasma, optionally a non- hollow-cathode plasma, optionally can be formed in the vicinity of the substrate
- the precursor optionally can be provided in the substantial absence of oxygen.
- the precursor optionally can be provided in the substantial absence of a carrier gas.
- the precursor optionally can be provided in the substantial absence of nitrogen.
- the precursor optionally can be provided at less than 1 Torr absolute pressure.
- the precursor optionally can be provided to the vicinity of a plasma emission.
- the coating optionally can be applied to the substrate at a thickness of 1 to 5000 nm, or 10 to 1000 nm, or 10-200 nm, or 20 to 100 nm thick.
- the thickness of this and other coatings can be measured, for example, by transmission electron microscopy (TEM).
- V.C. The TEM can be carried out, for example, as follows. Samples can be prepared for Focused Ion Beam (FIB) cross-sectioning in two ways. Either the samples can be first coated with a thin layer of carbon (50-1 OOnm thick) and then coated with a sputtered layer of platinum (50-1 OOnm thick) using a K575X Emitech coating system, or the samples can be coated directly with the protective sputtered Pt layer. The coated samples can be placed in an FEI FIB200 FIB system. An additional layer of platinum can be FIB-deposited by injection of an organo-metallic gas while rastering the 3OkV gallium ion beam over the area of interest.
- FIB Focused Ion Beam
- the area of interest for each sample can be chosen to be a location half way down the length of the syringe barrel.
- Thin cross sections measuring approximately 15 ⁇ m ("micrometers") long, 2 ⁇ m wide and 15 ⁇ m deep can be extracted from the die surface using a proprietary in-situ FIB lift-out technique.
- the cross sections can be attached to a 200 mesh copper TEM grid using FIB-deposited platinum.
- One or two windows in each section, measuring ⁇ 8 ⁇ m wide, can be thinned to electron transparency using the gallium ion beam of the FEI FIB.
- V.C Cross-sectional image analysis of the prepared samples can be performed utilizing either a Transmission Electron Microscope (TEM), or a Scanning Transmission Electron Microscope (STEM), or both. All imaging data can be recorded digitally.
- TEM Transmission Electron Microscope
- STEM Scanning Transmission Electron Microscope
- the grid with the thinned foils can be transferred to a Hitachi HD2300 dedicated STEM.
- Scanning transmitted electron images can be acquired at appropriate magnifications in atomic number contrast mode (ZC) and transmitted electron mode (TE). The following instrument settings can be used.
- V.C For TEM analysis the sample grids can be transferred to a Hitachi HF2000 transmission electron microscope. Transmitted electron images can be acquired at appropriate magnifications. The relevant instrument settings used during image acquisition can be those given below.
- the substrate can comprise glass or a polymer, for example a polycarbonate polymer, an olefin polymer, a cyclic olefin copolymer, a polypropylene polymer, a polyester polymer, a polyethylene terephthalate polymer or a combination of any two or more of these.
- a polymer for example a polycarbonate polymer, an olefin polymer, a cyclic olefin copolymer, a polypropylene polymer, a polyester polymer, a polyethylene terephthalate polymer or a combination of any two or more of these.
- the PECVD optionally can be performed by energizing the gaseous reactant containing the precursor with electrodes powered at a RF frequency as defined above, for example a frequency from 10 kHz to less than 300 MHz, more preferably of from 1 to 50 MHz, even more preferably of from 10 to 15 MHz, most preferably a frequency of 13.56 MHz..
- a RF frequency as defined above, for example a frequency from 10 kHz to less than 300 MHz, more preferably of from 1 to 50 MHz, even more preferably of from 10 to 15 MHz, most preferably a frequency of 13.56 MHz..
- the plasma can be generated by energizing the gaseous reactant comprising the precursor with electrodes supplied with electric power sufficient to form a lubricity coating.
- the plasma is generated by energizing the gaseous reactant containing the precursor with electrodes supplied with an electric power of from 0.1 to 25 W, preferably from 1 to 22 W, more preferably from 3 to 17 W, even more preferably of from 5 to 14 W, most preferably of from 7 to 11 W, in particular of 8 W.
- the ratio of the electrode power to the plasma volume may be less than 10 W/ml, preferably is from 5 W/ml to 0.1 W/ml, more preferably is from 4 W/ml to 0.1 W/ml, most preferably from 2 W/ml to 0.2 W/ml.
- These power levels are suitable for applying lubricity coatings to syringes and sample tubes and vessels of similar geometry having a void volume of 1 to 3 ml_ in which PECVD plasma is generated. It is contemplated that for larger or smaller objects the power applied should be increased or reduced accordingly to scale the process to the size of the substrate.
- V.C One contemplated product optionally can be a syringe having a barrel treated by the method of any one or more of embodiments V.C.
- V.D Another example of a suitable barrier or other type of coating, usable in conjunction with PECVD-applied coatings or other PECVD treatment as disclosed here, can be a liquid barrier, lubricant, surface energy tailoring, or other type of coating 90 applied to the interior surface of a vessel, either directly or with one or more intervening PECVD-applied coatings of Si w O x CyH z , SiO x , a lubricity coating, or both.
- V. D Another example of a suitable barrier or other type of coating, usable in conjunction with PECVD-applied coatings or other PECVD treatment as disclosed here, can be a liquid barrier, lubricant, surface energy tailoring, or other type of coating 90 applied to the interior surface of a vessel, either directly or with one or more intervening PECVD-applied coatings of Si w O x CyH z , SiO x , a lubricity coating, or both.
- Suitable liquid barriers or other types of coatings 90 also optionally can be applied, for example, by applying a liquid monomer or other polymerizable or curable material to the interior surface of the vessel 80 and curing, polymerizing, or crosslinking the liquid monomer to form a solid polymer.
- Suitable liquid barrier or other types of coatings 90 can also be provided by applying a solvent-dispersed polymer to the surface 88 and removing the solvent.
- V. D. Either of the above methods can include as a step forming a coating 90 on the interior 88 of a vessel 80 via the vessel port 92 at a processing station or device 28.
- a liquid coating for example of a curable monomer, prepolymer, or polymer dispersion
- PVdC acrylic and polyvinylidene chloride
- V. D. Either of the above methods can also or include as a step forming a coating on the exterior outer wall of a vessel 80.
- the coating optionally can be a barrier coating, optionally an oxygen barrier coating, or optionally a water barrier coating.
- a suitable coating is polyvinylidene chloride, which functions both as a water barrier and an oxygen barrier.
- the barrier coating can be applied as a water- based coating.
- the coating optionally can be applied by dipping the vessel in it, spraying it on the vessel, or other expedients.
- a vessel having an exterior barrier coating as described above is also contemplated.
- One station or device shown in FIG. 1 is the processing station or device 30, which can be configured to inspect the interior surface of a vessel 80 for defects, as by measuring the air pressure loss or mass flow rate or volume flow rate through a vessel wall or outgassing of a vessel wall.
- the device 30 can operate similarly to the device 26, except that better performance (less leakage or permeation at given process conditions) can be required of the vessel to pass the inspection provided by the device 30, since in the illustrated embodiment a barrier or other type of coating has been applied by the station or device 28 before the station or device 30 is reached.
- this inspection of the coated vessel 80 can be compared to the inspection of the same vessel 80 at the device or station 26. Less leakage or permeation at the station or device 30 indicates that the barrier coating is functioning at least to a degree.
- Vl The identity of a vessel 80 measured at two different stations or by two different devices can be ascertained by placing individual identifying characteristics, such as a bar code, other marks, or a radio frequency identification (RFID) device or marker, on each of the vessel holders 38-68 and matching up the identity of vessels measured at two or more different points about the endless conveyor shown in FIG. 1. Since the vessel holders can be reused, they can be registered in a computer database or other data storage structure as they reach the position of the vessel holder 40 in FIG. 1 , just after a new vessel 80 has been seated on the vessel holder 40, and removed from the data register at or near the end of the process, for example as or after they reach the position of the vessel holder 66 in FIG. 1 and the processed vessel 80 is removed by the transfer mechanism 74.
- RFID radio frequency identification
- the processing station or device 32 can be configured to inspect a vessel, for example a barrier or other type of coating applied to the vessel, for defects.
- the station or device 32 determines the optical source transmission of the coating, as a measurement of the thickness of the coating.
- the barrier or other type of coating if suitably applied, can make the vessel 80 more transparent, even though additional material has been applied, as it provides a more uniform surface.
- Vl thickness of the coating
- Other measures of the thickness of the coating are also contemplated, as by using interference measurements to determine the difference in travel distance between an energy wave that bounces off the inside of the coating 90 (interfacing with the atmosphere within the vessel interior 154) and an energy wave that bounces off the interior surface 88 of the vessel 80 (interfacing with the outside of the coating 90).
- the difference in travel distance can be determined directly, as by measuring the time of arrival of the respective waves with high precision, or indirectly, as by determining what wavelengths of the incident energy are reinforced or canceled, in relation to the test conditions.
- Vl Another measurement technique that can be carried out to check coating integrity is an ellipsometric measurement on the device.
- a polarized laser beam can be projected either from the inside or the outside of the vessel 80.
- the laser beam can be pointed orthogonally at the surface and then either the transmitted or reflected beam can be measured.
- the change in beam polarity can be measured. Since a coating or treatment on the surface of the device will impact (change) the polarization of the laser beam, changes in the polarity can be the desired result.
- the changes in the polarity are a direct result of the existence of a coating or treatment on the surface and the amount of change is related to the amount of treatment or coating.
- a detector can be positioned on the inside to measure the transmitted component of the beam (and the polarity determined as above). Or, a detector can be placed outside of the device in a position that can correspond to the reflection point of the beam from the interface between the treatment/coating (on the inside of the device). The polarity change(s) can then be determined as detailed above.
- Vl In addition to measuring optical properties and/or leak rates as described above, other probes and/or devices can be inserted into the inside of the device and measurements made with a detector apparatus. This apparatus is not limited by the measurement technique or method. Other test methods that employ mechanical, electrical, or magnetic properties, or any other physical, optical, or chemical property, can be utilized.
- an optical detection system optionally can be used to record the plasma emission spectrum (wavelength and intensity profile), which corresponds to the unique chemical signature of the plasma environment. This characteristic emission spectrum provides confirmation that the coating has been applied and treated.
- the system also offers a real-time precision measurement and data archive tool for each part processed.
- Any of the above methods can include as a step inspecting the interior surface 88 of a vessel 80 for defects at a processing station such as 24, 26, 30, 32, or 34. Inspecting can be carried out, as at the stations 24, 32, and 34, by inserting a detection probe 172 into the vessel 80 via the vessel port 92 and detecting the condition of the vessel interior surface 88 or a barrier or other type of coating 90 using the probe 172. Inspecting can be carried out, as shown in FIG. 1 1 , by radiating energy inward through the vessel wall 86 and vessel interior surface 88 and detecting the energy with the probe 172. Or, inspecting can be carried out by reflecting the radiation from the vessel interior surface 88 and detecting the energy with a detector located inside the vessel 80. Or, inspecting can be carried out by detecting the condition of the vessel interior surface 88 at numerous, closely spaced positions on the vessel interior surface.
- any of the above methods can include carrying out the inspecting step at a sufficient number of positions throughout the vessel interior surface 88 to determine that the barrier or other type of coating 90 will be effective to prevent the pressure within the vessel, when it is initially evacuated and its wall is exposed to the ambient atmosphere, from increasing to more than 20% of the ambient atmospheric pressure during a shelf life of a year.
- any of the above methods can include carrying out the inspecting step within an elapsed time of 30 or fewer seconds per vessel, or 25 or fewer seconds per vessel, or 20 or fewer seconds per vessel, or 15 or fewer seconds per vessel, or 10 or fewer seconds per vessel, or 5 or fewer seconds per vessel, or 4 or fewer seconds per vessel, or 3 or fewer seconds per vessel, or 2 or fewer seconds per vessel, or 1 or fewer seconds per vessel. This can be made possible, for example, by measuring the efficacy of the barrier or other type of coated vessel wall, as shown in FIG.
- a multi-point vessel inspection can be further expedited, if desired, by collecting data using a charge coupled device 172, transporting away the vessel 80 that has just been inspected, and processing the collected data shortly thereafter, while the vessel 80 is moving downstream. If a defect in the vessel 80 is later ascertained due to the data processing, the vessel 80 that is defective can be moved off line at a point downstream of the detection station such as 34 (FIG. 10).
- the inspecting step can be carried out at a sufficient number of positions throughout the vessel 80 interior surface 88 to determine that the barrier or other type of coating 90 will be effective to prevent the initial vacuum level (i.e. initial reduction of pressure versus ambient) within the vessel 80, when it is initially evacuated and its wall 86 is exposed to the ambient atmosphere, from decreasing more than 20%, optionally more than 15%, optionally more than 10%, optionally more than 5%, optionally more than 2%, during a shelf life of at least 12 months, or at least 18 months, or at least two years.
- initial vacuum level i.e. initial reduction of pressure versus ambient
- the initial vacuum level can be a high vacuum, i.e. a remaining pressure of less than 10 Torr, or a lesser vacuum such as less than 20 Torr of positive pressure (i.e. the excess pressure over a full vacuum), or less than 50 Torr, or less than 100 Torr, or less than 150 Torr, or less than 200 Torr, or less than 250 Torr, or less than 300 Torr, or less than 350 Torr, or less than 380 Torr of positive pressure.
- the initial vacuum level of evacuated blood collection tubes for example, is in many instances determined by the type of test the tube is to be used for, and thus the type and appropriate amount of a reagent that is added to the tube at the time of manufacture.
- the initial vacuum level is commonly set to draw the correct volume of blood to combine with the reagent charge in the tube.
- the barrier or other type of coating 90 inspecting step can be carried out at a sufficient number of positions throughout the vessel interior surface 88 to determine that the barrier or other type of coating 90 will be effective to prevent the pressure within the vessel 80, when it is initially evacuated and its wall is exposed to the ambient atmosphere, from increasing to more than 15%, or more than 10%, of the ambient atmospheric pressure of the ambient atmospheric pressure during a shelf life of at least one year.
- Even another embodiment is a vessel processing method for processing a molded plastic vessel having an opening and a wall defining an interior surface. The method is carried out by inspecting the interior surface of the vessel as molded or just before coating for defects; applying a coating to the interior surface of the vessel after inspecting the vessel as molded; and inspecting the coating for defects.
- VI.A Another embodiment is a vessel processing method in which a barrier coating is applied to the vessel after inspecting the vessel as molded, and the interior surface of the vessel is inspected for defects after applying the barrier coating.
- the station or device 26 (which can also function as the station or device 28 for applying a coating) can be used as follows for barometric vessel inspection. With either or both of the valves 136 and 148 open, the vessel 80 can be evacuated to a desired degree, preferably to a very low pressure such as less than 10 Torr, optionally less than 1 Torr. Whichever of the valves 136 and 148 is initially open can then be closed, isolating the evacuated interior 154 of the vessel 80 and the pressure gauge 152 from ambient conditions and from the vacuum source 98.
- the change in pressure over a measurement time can then be sensed and used to calculate the rate of ingress of ambient gas into the vessel 80 as mounted on the vessel holder 44.
- outgassing is defined as the release of adsorbed or occluded gases or water vapor from the vessel wall, optionally in at least a partial vacuum.
- VI.A Another optional modification can be to provide the ambient gas at a higher pressure than atmospheric pressure. This again can increase the rate of gas transfer through a barrier or other type of layer, providing a measurable difference in a shorter time than if a lower ambient pressure were provided. Or, gas can be introduced into the vessel 80 at a higher than atmospheric pressure, again increasing the transfer rate through the wall 86.
- the vessel inspection at the station or by the device 26 can be modified by providing an inspection gas, such as helium, on an upstream side with respect to the substrate, either within or outside the vessel 80, and detecting it on the downstream side.
- an inspection gas such as helium
- Helium has a high transfer rate through many solid substrates or small gaps because it: (1 ) is inert, so it is not adsorbed by the substrate to any great degree, (2) is not ionized easily, so its molecules are very compact due to the high level of attraction between its electrons and nucleus, and (3) has a molecular weight of 4, as opposed to nitrogen (molecular weight 28) and oxygen (molecular weight 32), again making the molecules more compact and easily passed through a porous substrate or gap. Due to these factors, helium will travel through a barrier having a given permeability much more quickly than many other gases.
- the atmosphere contains an extremely small proportion of helium naturally, so the presence of additional helium can be relatively easy to detect, particularly if the helium is introduced within the vessel 80 and detected outside the vessel 80 to measure leakage and permeation.
- the helium can be detected by a pressure drop upstream of the substrate or by other means, such as spectroscopic analysis of the downstream gas that has passed through the substrate.
- An Excitation Source (Ocean Optics USB-LS-450 Pulsed Blue LED), fiber assembly (Ocean Optics QBIF6000-VIS-NIR), a spectrometer (USB4000-FL Fluorescence Spectrometer), an oxygen sensor probe (Ocean Optics FOXY-R), and a vacuum feed through adaptor (like VFT-1000-VIS-275) connected to a vacuum source are used.
- a vacuum can be applied to remove the ambient air, and when the vessel is at a defined pressure any oxygen content that has leaked or permeated in to refill the vessel from the ambient air can be determined using the detection system.
- a coated tube replaces the uncoated tube and O 2 concentration measurement can be taken.
- the coated tube will demonstrate reproducibly different atmospheric oxygen content than the uncoated sample due to differential O 2 surface absorption on the coated tube (an SiO x surface, versus the uncoated PET or glass surface) and/or a change in O 2 diffusion rate from the surface. Detection time can be less than one second.
- the processing station or device 34 also can be configured to inspect a barrier or other type of coating for defects.
- the processing station or device 34 can be another optical inspection, this time intended to scan or separately measure the properties of at least a portion of the barrier or other type of coating 90, or substantially the entire barrier or other type of coating 90, at numerous, closely spaced positions on the barrier or other type of coating 90.
- the numerous, closely spaced positions can be, for example, spaced about 1 micron apart, or about 2 microns apart, or about 3 microns apart, or about 4 microns apart, or about 5 microns apart, or about 6 microns apart, or about 7 microns apart, either in every case or on average over at least part of the surface, thus separately measuring some or all small portions of the barrier or other type of coating 90.
- a separate scan of each small area of the coating can be useful to find individual pinholes or other defects, and to distinguish the local effects of pinhole defects from more general defects, such as a large area with a coating that is too thin or porous.
- the inspection by the station or device 34 can be carried out by inserting a radiation or light source 170 or any other suitable radio frequency, microwave, infrared, visible light, ultraviolet, x-ray, or electron beam source, for example, into the vessel 80 via the vessel port 92 and detecting the condition of the vessel interior surface, for example the barrier coating 90, by detecting radiation transmitted from the radiation source using a detector.
- a radiation or light source 170 or any other suitable radio frequency, microwave, infrared, visible light, ultraviolet, x-ray, or electron beam source for example
- the above vessel holder system can also be used for testing the device.
- the probe 108 of FIG. 2 having a gas delivery port 110 can be replaced by a light source 170 (FIG. 10).
- the light source 170 can irradiate the inside of the tube and then subsequent testing can be completed outside of the tube, measuring transmission or other properties.
- the light source 170 can be extended into the inside of the tube in the same manner that the probe 108 is pushed into the puck or vessel holder 62, although a vacuum and seals are not necessarily required.
- the light source 170 can be an optical fiber source, a laser, a point (such as an LED) source or any other radiation source.
- the source can radiate at one or more frequencies from the deep UV (100nm) into the far infra red (100 microns) and all frequencies in between. There is no limitation on the source that can be used.
- Vl. A As a specific example see FIG. 10.
- the tube or vessel 80 is positioned in the puck or vessel holder 62 and a light source 170 at the end of the probe 108 has been inserted into the tube.
- the light source 170 in this case can be a blue LED source of sufficient intensity to be received by the detector 172 surrounding the outside of the vessel 80.
- the light source 170 can be, for example, a three dimensional charge-coupled-device (CCD) comprising an array of pixels such as 174 on its interior surface 176. The pixels such as 174 receive and detect the illumination radiated through the barrier or other type of coating 90 and vessel wall 86.
- CCD charge-coupled-device
- the detector 172 has a larger inner diameter relative to the vessel 80 than the separation of the electrode 164 and vessel 80 of FIG. 2, and has a cylindrical top portion adjacent to the closed end 84 instead of a hemispherical top portion.
- the outside detector 172 or can have a smaller radial gap from the vessel 80 and a gap of more uniform dimension at its top portion adjacent to the closed end 84. This can be accomplished, for example, by providing a common center of curvature for the closed end 84 and the top of the detector 172 when the vessel 80 is seated. This variation might provide more uniform inspection of the curved closed end 84 of the vessel 80, although either variation is contemplated to be suitable. [636] Vl. A.
- the CCD Prior to the light source being turned on, the CCD is measured and the resulting value stored as a background (which can be subtracted from subsequent measurements).
- the light source 170 is then turned on and measurements taken with the CCD.
- the resulting measurements can then be used to compute total light transmission (and compared to an uncoated tube to determine the average coating thickness) and defect density (by taking individual photon counts on each element of the CCD and comparing them to a threshold value - if the photon count is lower, then this corresponds to not enough light being transmitted).
- Low light transmission likely is the result of no or too-thin coating - a defect in the coating on the tube.
- the defect size can be estimated.
- the tube's quality can be assessed, or other properties determined that might be specific to the frequency of the radiation from the light source 170.
- energy can be radiated outward through the vessel interior surface, such as through the coating 90 and the vessel wall 86, and detected with a detector 172 located outside the vessel.
- detectors 172 can be used.
- the degree of resolution of the pixels such as 174 for detecting radiation passing through a particular portion of the barrier or other type of coating 90 and vessel wall 86 can be increased by placing the CCD so its array of pixels such as 174 is very close to and closely conforms to the contours of the vessel wall 86.
- the degree of resolution can also be increased by selecting a smaller or essentially point source of light, as shown diagrammatically in FIG. 6, to illuminate the interior of the vessel 80. Using smaller pixels will also improve the resolution of the array of pixels in the CCD.
- a point light source 132 (laser or LED) is positioned at the end of a rod or probe.
- Point source refers either to light emanating from a small- volume source resembling a mathematical point, as can be generated by a small LED or a diffusing tip on an optical fiber radiating light in all directions, or to light emanated as a small-cross-section beam, such as coherent light transmitted by a laser.
- the point source of light 132 can be either stationary or movable, for example axially movable, while the characteristics of the barrier or other type of coating 90 and vessel wall 80 are being measured. If movable, the point light source 132 can be moved up and down inside of the device (tube) 80.
- the interior surface 88 of the vessel 80 can be scanned and subsequent measurements made by an external detector apparatus 134 to determine coating integrity.
- An advantage of this approach is that a linearly polarized or similar coherent light source with specific directionality can be used.
- the position of the point source of light 132 can be indexed to the pixels such as 174 so the illumination of the detectors can be determined at the time the detector is at a normal angle with respect to a particular area of the coating 90.
- a cylindrical detector 172 optionally with a curved end matching the curve (if any) of the closed end 84 of a vessel 80, can be used to detect the characteristics of a cylindrical vessel 80.
- the inspection station or device 24 or 34 can be modified by reversing the positions of the light or other radiation source 170 and detector 172 so the light radiates through the vessel wall 86 from the exterior to the interior of the vessel 80. If this expedient is selected, in an embodiment a uniform source of incident light or other radiation can be provided by inserting the vessel 80 into an aperture 182 through the wall 184 of an integrating sphere light source 186.
- An integrating sphere light source will disperse the light or radiation from the source 170 outside the vessel 80 and inside the integrating sphere, so the light passing through the respective points of the wall 86 of the vessel 80 will be relatively uniform. This will tend to reduce the distortions caused by artifacts relating to portions of the wall 86 having different shapes.
- the detector 172 can be shown to closely conform to the barrier or other type of coating 90 or interior surface 88 of the vessel 80. Since the detector 172 can be on the same side of the vessel wall 86 as the barrier or other type of coating 80, this proximity will tend to increase the resolution of the pixels such as 174, though in this embodiment the detector 172 preferably will be precisely positioned relative to the barrier or other type of coating 90 to avoid scraping one against the other, possibly damaging either the coating or the CCD array. Placing the detector 172 immediately adjacent to the coating 90 also can reduce the effects of refraction by the vessel wall 86, which in the embodiment of FIG. 10 occurs after the light or other radiation passes through the barrier or other type of coating 90, so the signal to be detected can be differentially refracted depending on the local shape of the vessel 80 and the angle of incidence of the light or other radiation.
- Vl. A Other barrier or other type of coating inspection techniques and devices can also, or, be used.
- fluorescence measurements can be used to characterize the treatment/coating on the device.
- a light source 132 or 170 (or other radiation source) can be selected that can interact with the polymer material of the wall 86 and/or a dopant in the polymer material of the wall 86. Coupled with a detection system, this can be used to characterize a range of properties including defects, thicknesses and other performance factors.
- Yet another example of inspection is to use x-rays to characterize the treatment/coating and/or the polymer itself.
- the light source can be replaced with an x-radiation source and the external detector can be of a type to measure the x-ray intensity. Elemental analysis of the barrier or other type of coating can be carried out using this technique.
- an apparatus was disclosed for holding a device (a puck or vessel holder such as 38-68) and moving it through a production process, including various tests and a treatment/coating operation.
- Several possible tests can be implemented to ensure that a device will have the appropriate surface for treatment/coating. These include:
- Vl. A. Digital Inspection - for example, using a digital camera that can measure specific lengths and geometries (for example how "round” or otherwise evenly or correctly shaped the open end of a sample collection tube is relative to a reference).
- the device for example a sample collection tube 80
- a light source (or other source) 132 can be inserted into the device and an appropriate detector 134 positioned outside of the device to measure the desired result.
- Vl. A In the case of vacuum leak detection, the vessel holder and device can be coupled to a vacuum pump and a measuring device inserted into the tube. The testing can also be conducted as detailed elsewhere in the specification. [666] Vl. A.
- the processing station or device 24 can be a visual inspection station, and can be configured to inspect one or more of the interior surface 88 of a vessel, its exterior surface 1 18, or the interior of its vessel wall 86 between its surfaces 88 and 1 18 for defects. The inspection of the exterior surface 1 18, the interior surface 88, or the vessel wall 86 can be carried out from outside the vessel 80, particularly if the vessel is transparent or translucent to the type of radiation and wavelength used for inspection.
- the inspection of the interior surface 88 can or be facilitated, if desired, by providing an optical fiber probe inserted into the vessel 80 via the vessel port 92, so a view of the inside of the vessel 80 can be obtained from outside the vessel 80.
- An endoscope or borescope can be used in this environment, for example.
- Vl. A. Another expedient illustrated in FIG. 6 can be to insert a light source 132 within a vessel 80.
- the light transmitted through the vessel wall 86, and artifacts of the vessel 80 made apparent by the light, can be detected from outside the vessel 80, as by using a detector measuring apparatus 134.
- This station or device 24 can be used, for example, to detect and correct or remove misaligned vessels 80 not properly seated on the vessel port 96 or vessels 80 that have a visible distortion, impurity, or other defect in the wall 86.
- Visual inspection of the vessel 80 also can be conducted by a worker viewing the vessel 80, instead or in addition to machine inspection.
- Vl. A The processing station or device 26, shown in more detail in FIG. 7, can be optionally configured to inspect the interior surface 88 of a vessel 80 for defects, and for example to measure the gas pressure loss through the vessel wall 86, which can be done before a barrier or other type of coating is provided. This test can be carried out by creating a pressure difference between the two sides of the barrier coating 90, as by pressurizing or evacuating the interior of the vessel 80, isolating the interior 154 of the vessel 80 so the pressure will remain constant absent leakage around the seal or permeation of gas through the vessel wall, and measuring the pressure change per unit time accumulating from these problems.
- This measurement will not only reveal any gas coming through the vessel wall 86, but will also detect a leaking seal between the mouth 82 of the vessel and the O-ring or other seal 100, which might indicate either a problem with the alignment of the vessel 80 or with the function of the seal 100. In either case, the tube mis-seating can be corrected or the tube taken out of the processing line, saving time in attempting to achieve or maintain the proper processing vacuum level and preventing the dilution of the process gases by air drawn through a malfunctioning seal.
- FIG. 1 shows a schematic layout of the steps of one possible method (although this invention is not limited to a single concept or approach).
- the vessel 80 is visually inspected at the station or by the device 24, which can include dimensional measurement of the vessel 80. If there are any defects found, the device or vessel 80 is rejected and the puck or vessel holder such as 38 is inspected for defects, recycled or removed.
- the puck or vessel holder 38 then moves, for example, into the coating step 28.
- the device or vessel 80 is coated with a SiO x or other barrier or other type of coating at a power supply frequency of, for example, 13.56 MHz.
- the vessel holder is retested for its leak rate or other characteristics (this can be carried out as a second test at the testing station 26 or a duplicate or similar station such as 30 - the use of a duplicate station can increase the system throughput).
- the coated measurement can be compared to the uncoated measurement. If the ratio of these values exceeds a pre-set required level, indicating an acceptable overall coating performance, the vessel holder and device move on.
- An optical testing station 32 for example, follows with a blue light source and an external integrating sphere detector to measure the total light transmitted through the tube. The value can be required to exceed a pre-set limit at which the device is rejected or recycled for additional coating.
- a second optical testing station 34 can be used. In this case a point light source can be inserted inside of the tube or vessel 80 and pulled out slowly while measurements are taken with a tubular CCD detector array outside of the tube. The data is then computationally analyzed to determine the defect density distribution. Based on the measurements the device is either approved for final packaging or rejected.
- the above data optionally can be logged and plotted (for example, electronically) using statistical process control techniques to ensure up to 6-sigma quality.
- VLB Vessel Inspection By Detecting Outgassing Of Container Wall Through Barrier Layer
- VLB Another embodiment is a method for inspecting a barrier or other type of layer on a material that outgasses a vapor, having several steps.
- a sample of material that outgasses a gas and has at least a partial barrier layer is provided.
- a pressure differential can be provided across the barrier layer, such that at least some of the material that outgasses is on the higher-pressure side of the barrier layer.
- the outgassed gas can be allowed to diffuse without providing a pressure difference. The outgassed gas is measured. If a pressure differential is provided across the barrier layer, the outgassing can be measured on the higher- pressure or lower-pressure side of the barrier layer.
- VLB VLB.
- a measurement of the efficacy of the interior coating can be made by measuring the diffusion rate of a specific species or adsorbed materials in the wall of the device (prior to coating).
- this type of measurement can provide a direct measurement of the barrier or other type of properties of the coating or treatment, or the presence or absence of the coating or treatment.
- the coating or treatment detected, in addition to or instead of being a barrier layer can be a lubricity layer, a hydrophobic layer, a decorative coating, or other types of layers that modify the outgassing of the substrate, either by increasing or decreasing it.
- VLB As a specific example using the vessel holder from FIG. 2 and referring again to FIG. 7, a device or vessel 80 can be inserted into the puck or vessel holder 44 (the test can also be carried out on a seated vessel 80 carried in a puck or vessel holder such as 44 moving from another operation such as coating/treatment). Once the vessel holder moves into the barrier testing area, the measurement tube or probe 108 can be inserted into the inside (in a similar manner as the gas tube for coating, although the measurement tube does not need to extend as far into the tube). Valves 136 and 148 can both be opened and the interior of the tube can be evacuated (a vacuum created).
- VLB Once a desired measurement pressure is reached, the valves 136 and 148 can be closed and the pressure gauge 152 can begin measuring the pressure. By measuring the time that a particular pressure (higher than the starting pressure) is reached or by measuring the pressure reached after a given amount of time, the rate of rise (or leak-rate) of the tube, vessel holder, pump channel and all other parts connected to the interior volume but isolated by valve 1 and 2 can be measured. If this value is then compared to an uncoated tube, the ratio of the two measurements (the coated tube value divided by the uncoated tube value) can yield a measurement of the leak rate through the coated surface of the tube.
- This measurement technique can require the minimization of the interior volume of the vessel holder, pump channel and all other parts connected to the interior volume but isolated by valve 1 and 2 (except the tube/device) to minimize the impact of gas permeation or outgassing from these surfaces.
- VLB Distinctions are made in this disclosure among “permeation,” “leakage,” and “surface diffusion” or “outgassing.”
- Period as used here in reference to a vessel is traverse of a material through a wall 346 or other obstruction, as from the outside of the vessel to the inside or vice versa along the path 350 in FIG. 29 or the reverse of that path.
- Outgassing refers to the movement of an absorbed or adsorbed material such as the gas molecule 354 or 357 or 359 outward from within the wall 346 or coating 348 in FIG. 29, for example through the coating 348 (if present) and into the vessel 358 (to the right in FIG. 29). Outgassing can also refer to movement of a material such as 354 or 357 out of the wall 346, to the left as shown in FIG. 29, thus to the outside of the vessel 357 as illustrated. Outgassing can also refer to the removal of adsorbed material from the surface of an article, for example the gas molecule 355 from the exposed surface of the barrier coating 90.
- Leakage refers to the movement of a material around the obstruction represented by the wall 346 and coating 348 rather than through or off the surface of the obstruction, as by passing between a closure and the wall of a vessel closed with a closure.
- VLB Permeation is indicative of the rate of gas movement through a material, devoid of gaps/defects and not relating to leaks or outgassing.
- FIG. 29 which shows a vessel wall or other substrate 346 having a barrier coating 348, permeation is traverse of a gas entirely through the substrate 346 and coating 348 along the path 350 through both layers. Permeation is regarded as a thermodynamic, thus relatively slow, process.
- VLB Permeation measurements are very slow, as the permeating gas must past entirely through an unbroken wall of the plastic article.
- a measurement of permeation of gas through its wall is conventionally used as a direct indication of the propensity of the vessel to lose vacuum over time, but commonly is an extremely slow measurement, commonly requiring a test duration of six days, thus not fast enough to support on-line coating inspection.
- Such testing is ordinarily used for off-line testing of a sample of vessels.
- VLB Permeation testing also is not a very sensitive measurement of the barrier efficacy of a thin coating on a thick substrate. Since all the gas flow is through both the coating and the substrate, variations in flow through the thick substrate will introduce variation that is not due to the barrier efficacy of the coating per se.
- VLB The inventors have found a much quicker and potentially more sensitive way of measuring the barrier properties of a coating - measuring outgassing of quickly-separated air or other gaseous or volatile constituents in the vessel wall through the coating.
- the gaseous or volatile constituents can be any material that in fact outgasses, or can be selected from one or more specific materials to be detected.
- the constituents can include, but are not limited to, oxygen, nitrogen, air, carbon dioxide, water vapor, helium, volatile organic materials such as alcohols, ketones, hydrocarbons, coating precursors, substrate components, by-products of the preparation of the coating such as volatile organosilicons, by-products of the preparation of the coated substrate, other constituents that happen to be present or are introduced by spiking the substrate, or mixtures or combinations of any of these.
- volatile organic materials such as alcohols, ketones, hydrocarbons, coating precursors, substrate components, by-products of the preparation of the coating such as volatile organosilicons, by-products of the preparation of the coated substrate, other constituents that happen to be present or are introduced by spiking the substrate, or mixtures or combinations of any of these.
- yet another method is contemplated for inspecting a barrier layer on a material that outgasses a vapor, including several steps.
- a sample of material is provided that outgasses a gas and has at least a partial barrier layer.
- a pressure differential is provided across the barrier layer, such that at least some of the material that outgasses initially is on the higher-pressure side of the barrier layer.
- the outgassed gas transported to the lower-pressure side of the barrier layer during a test is measured to determine such information as whether the barrier is present or how effective it is as a barrier.
- the material that outgasses a gas can include a polymeric compound, a thermoplastic compound, or one or more compounds having both properties.
- the material that outgasses a gas can include polyester, for example polyethylene terephthalate.
- the material that outgasses a gas can include a polyolefin, for two examples polypropylene, a cyclic olefin copolymer, or a combination of these.
- the material that outgasses a gas can be a composite of two different materials, at least one of which outgasses a vapor.
- One example is a two layer structure of polypropylene and polyethylene terephthalate.
- Another example is a two layer structure of cyclic olefin copolymer and polyethylene terephthalate.
- the material that outgasses a gas is provided in the form of a vessel having a wall having an outer surface and an inner surface, the inner surface enclosing a lumen.
- the barrier layer optionally is disposed on the vessel wall, optionally on the inner surface of the vessel wall.
- the barrier layer could or also be disposed on the outer surface of the vessel wall.
- the material that outgasses a gas can be provided in the form of a film.
- the barrier layer can be a full or partial coating of any of the presently described barrier layers.
- the barrier layer can be less than 500 nm thick, or less than 300 nm thick, or less than 100 nm thick, or less than 80 nm thick, or less than 60 nm thick, or less than 50 nm thick, or less than 40 nm thick, or less than 30 nm thick, or less than 20 nm thick, or less than 10 nm thick, or less than 5 nm thick.
- VLB VLB
- diffusion/ outgassing can be used to determine the coating integrity.
- a pressure differential can be provided across the barrier layer by at least partially evacuating the lumen or interior space of the vessel. This can be done, for example, by connecting the lumen via a duct to a vacuum source to at least partially evacuate the lumen.
- a vacuum source for example, an uncoated PET wall 346 of a vessel that has been exposed to ambient air will outgas from its interior surface a certain number of oxygen and other gas molecules such as 354 for some time after a vacuum is drawn. If the same PET wall is coated on the interior with a barrier coating 348, the barrier coating will stop, slow down, or reduce this outgassing.
- the barrier coating 348 is imperfect, due to known or theoretical holes, cracks, gaps or areas of insufficient thickness or density or composition, the PET wall will outgas preferentially through the imperfections, thus increasing the total amount of outgassing.
- the primary source of the collected gas is from the dissolved gas or vaporizable constituents in the (sub)surface of the plastic article next to the coating, not from outside the article.
- the amount of outgassing beyond a basic level for example the amount passed or released by a standard coating with no imperfections, or the least attainable degree of imperfection, or an average and acceptable degree of imperfection
- a basic level for example the amount passed or released by a standard coating with no imperfections, or the least attainable degree of imperfection, or an average and acceptable degree of imperfection
- VLB The measurement can be carried out, for example, by providing an outgassing measurement cell communicating between the lumen and the vacuum source.
- the measurement cell can implement any of a variety of different measurement technologies.
- One example of a suitable measurement technology is micro-flow technology.
- the mass flow rate of outgassed material can be measured.
- the measurement can be carried out in a molecular flow mode of operation.
- An exemplary measurement is a determination of the volume of gas outgassed through the barrier layer per interval of time.
- the outgassed gas on the lower-pressure side of the barrier layer can be measured under conditions effective to distinguish the presence or absence of the barrier layer.
- the conditions effective to distinguish the presence or absence of the barrier layer include a test duration of less than one minute, or less than 50 seconds, or less than 40 seconds, or less than 30 seconds, or less than 20 seconds, or less than 15 seconds, or less than 10 seconds, or less than 8 seconds, or less than 6 seconds, or less than 4 seconds, or less than 3 seconds, or less than 2 seconds, or less than 1 second.
- the measurement of the presence or absence of the barrier layer can be confirmed to at least a six-sigma level of certainty within any of the time intervals identified above.
- the outgassed gas on the lower-pressure side of the barrier layer is measured under conditions effective to determine the barrier improvement factor (BIF) of the barrier layer, compared to the same material without a barrier layer.
- BIF barrier improvement factor
- a BIF can be determined, for example, by providing two groups of identical containers, adding a barrier layer to one group of containers, testing a barrier property (such as the rate of outgassing in micrograms per minute or another suitable measure) on containers having a barrier, doing the same test on containers lacking a barrier, and taking a ratio of the properties of the materials with versus without a barrier. For example, if the rate of outgassing through the barrier is one-third the rate of outgassing without a barrier, the barrier has a BIF of 3.
- VLB outgassing of a plurality of different gases can be measured, in instances where more than one type of gas is present, such as both nitrogen and oxygen in the case of outgassed air.
- outgassing of substantially all or all of the outgassed gases can be measured.
- outgassing of substantially all of the outgassed gases can be measured simultaneously, as by using a physical measurement like the combined mass flow rate of all gases.
- VLB Measureasuring the number or partial pressure of individual gas species (such as oxygen or helium) outgassed from the sample can be done more quickly than barometric testing, but the rate of testing is reduced to the extent that only a fraction of the outgassing is of the measured species. For example, if nitrogen and oxygen are outgassed from the PET wall in the approximately 4:1 proportion of the atmosphere, but only oxygen outgassing is measured, the test would need to be run five times as long as an equally sensitive test (in terms of number of molecules detected to obtain results of sufficient statistical quality) that measures all the species outgassed from the vessel wall.
- gas species such as oxygen or helium
- VLB For a given level of sensitivity, it is contemplated that a method that accounts for the volume of all species outgassed from the surface will provide the desired level of confidence more quickly than a test that measures outgassing of a specific species, such as oxygen atoms. Consequently, outgassing data having practical utility for in-line measurements can be generated. Such in-line measurements can optionally be carried out on every vessel manufactured, thus reducing the number of idiosyncratic or isolated defects and potentially eliminating them (at least at the time of measurement).
- VLB VLB
- Leakage means a fluid bypassing a solid wall of the article, for example fluid passing between a blood tube and its closure, between a syringe plunger and syringe barrel, between a container and its cap, or between a vessel mouth and a seal upon which the vessel mouth is seated (due to an imperfect or mis-seated seal).
- the word "leakage” is usually indicative of the movement of gas/gas through an opening in the plastic article.
- VLB VLB. Leakage and (if necessary in a given situation) permeation can be factored into the basic level of outgassing, so an acceptable test result assures both that the vessel is adequately seated on the vacuum receptacle (thus its seated surfaces are intact and properly formed and positioned), the vessel wall does not support an unacceptable level of permeation (thus the vessel wall is intact and properly formed), and the coating has sufficient barrier integrity.
- VLB VLB.
- Outgassing can be measured in various ways, as by barometric measurement (measuring the pressure change within the vessel in a given amount of time after the initial vacuum is drawn) or by measuring the partial pressure or flow rate of gas outgassed from the sample.
- Equipment is available that measures a mass flow rate in a molecular flow mode of operation.
- An example of commercially available equipment of this type employing Micro-Flow Technology is available from ATC, Inc., Indianapolis, IN. See U.S. Patent Nos. 5861546, 6308556, 6584828 and EP1356260, which are incorporated by reference here, for a further description of this known equipment. See also Example 8 in this specification, showing an example of outgassing measurement to distinguish barrier coated polyethylene terephthalate (PET) tubes from uncoated tubes very rapidly and reliably.
- PET barrier coated polyethylene terephthalate
- VLB For a vessel made of polyethylene terephthalate (PET), the microflow rate is much different for the SiO x coated surface versus an uncoated surface. For example, in Working Example 8 in this specification, the microflow rate for PET was 8 or more micrograms after the test had run for 30 seconds, as shown in FIG. 31. This rate for uncoated PET was much higher than the measured rate for SiO x -coated PET, which was less than 6 micrograms after the test had run for 30 sec, again as shown in FIG. 31. [705] VLB.
- One possible explanation for this difference in flow rate is that uncoated PET contains roughly 0.7 percent equilibrium moisture; this high moisture content is believed to cause the observed high microflow rate.
- the SiO x coating may have a higher level of surface moisture than an uncoated PET surface.
- the barrier coating is believed to prevent additional desorption of moisture from the bulk PET plastic, resulting in a lower microflow rate.
- the microflow rates of oxygen or nitrogen from the uncoated PET plastic versus the SiO x coated PET would also be expected to be distinguishable.
- VLB VLB
- polyolefin plastics tend to have little moisture content.
- An example of a polyolefin having low moisture content is TOPAS® cyclic olefin copolymer (COC), having an equilibrium moisture content (0.01 percent) and moisture permeation rate much lower than for PET.
- COC TOPAS® cyclic olefin copolymer
- uncoated COC plastic can have microflow rate similar to, or even less than, SiO x -coated COC plastic. This is most likely due to the higher surface moisture content of the SiO x -coating and the lower equilibrium bulk moisture content and lower permeation rate of an uncoated COC plastic surface. This makes differentiation of uncoated and coated COC articles more difficult.
- the present invention shows that exposure of the to-be-tested surfaces of COC articles to moisture (uncoated and coated) results in improved and consistent microflow separation between uncoated and SiO x -coated COC plastics. This is shown in Example 19 in this specification and FIG. 57.
- the moisture exposure can be simply exposure to relative humidity ranging from 35%-100%, either in a controlled relative humidity room or direct exposure to a warm (humidifier) or cold (vaporizer) moisture source, with the latter preferred.
- the barrier layer can be contacted with water, for example water vapor.
- Water vapor can be provided, for example, by contacting the barrier layer with air at a relative humidity of 35% to 100%, alternatively 40% to 100%, alternatively 40% to 50%.
- the barrier layer can be contacted with oxygen, nitrogen or a mixture of oxygen and nitrogen, for example ambient air.
- the contacting time can be from 10 seconds to one hour, alternatively from one minute to thirty minutes, alternatively from 5 minutes to 25 minutes, alternatively from 10 minutes to 20 minutes.
- the wall 346 which will be outgassing can be spiked or supplemented from the side opposite a barrier layer 348, for example by exposing the left side of the wall 346 as shown in FIG. 1 1 to a material that will ingas into the wall 346, then outgas either to the left or to the right as shown in FIG. 29.
- Spiking a wall or other material such as 346 from the left by ingassing, then measuring outgassing of the spiked material from the right (or vice versa) is distinguished from permeation measurement because the material spiked is within the wall 346 at the time outgassing is measured, as opposed to material that travels the full path 350 through the wall at the time gas presented through the coating is being measured.
- the ingassing can take place over a long period of time, as one embodiment before the coating 348 is applied, and as another embodiment after the coating 348 is applied and before it is tested for outgassing.
- VLB Another potential method to increase separation of microflow response between uncoated and SiO x -coated plastics is to modify the measurement pressure and/ or temperature. Increasing the pressure or decreasing the temperature when measuring outgassing may result in greater relative binding of water molecules in SiO x - coated COC than in uncoated COC.
- the outgassed gas can be measured at a pressure from 0.1 Torr to 100 Torr, alternatively from 0.2 Torr to 50 Torr, alternatively from 0.5 Torr to 40 Torr, alternatively from 1 Torr to 30 Torr, alternatively from 5 Torr to 100 Torr, alternatively from 10 Torr to 80 Torr, alternatively from 15 Torr to 50 Torr
- the outgassed gas can be measured at a temperature from 0°C to 50 °C, alternatively from 0°C to 21 °C, alternatively from 5°C to 20 °C.
- VLB Another way contemplated for measuring outgassing, in any embodiment of the present disclosure, is to employ a microcantilever measurement technique. Such a technique is contemplated to allow measurement of smaller mass differences in outgassing, potentially on the order of 10 "12 g. (picograms) to 10 "15 g. (femtograms). This smaller mass detection permits differentiation of coated versus uncoated surfaces as well as different coatings in less than a second, optionally less than 0.1 sec, optionally a matter of microseconds.
- Microcantilever (MCL) sensors in some instances can respond to the presence of an outgassed or otherwise provided material by bending or otherwise moving or changing shape due to the absorption of molecules.
- Microcantilever (MCL) sensors in some instances can respond by shifting in resonance frequency. In other instances, the MCL sensors may change in both these ways or in other ways. They can be operated in different environments such as gaseous environment, liquids, or vacuum. In gas, microcantilever sensors can be operated as an artificial nose, whereby the bending pattern of a microfabricated array of eight polymer-coated silicon cantilevers is characteristic of the different vapors from solvents, flavors, and beverages. The use of any other type of electronic nose, operated by any technology, is also contemplated.
- VLB One specific example of measuring outgassing can be carried out as follows. At least one microcantilever is provided that has the property, when in the presence of an outgassed material, of moving or changing to a different shape. The microcantilever is exposed to the outgassed material under conditions effective to cause the microcantilever to move or change to a different shape. The movement or different shape is then detected. [716] VLB. As one example, the movement or different shape can be detected by reflecting an energetic incident beam from a portion of the microcantilever that moves or changes shape, before and after exposing the microcantilever to outgassing, and measuring the resulting deflection of the reflected beam at a point spaced from the cantilever. The shape is preferably measured at a point spaced from the cantilever because the amount of deflection of the beam under given conditions is proportional to the distance of the point of measurement from the point of reflection of the beam.
- VLB Several suitable examples of an energetic incident beam are a beam of photons, a beam of electrons, or a combination of two or more of these. Alternatively, two or more different beams can be reflected from the MCL along different incident and/or reflected paths, to determine movement or shape change from more than one perspective.
- One specifically contemplated type of energetic incident beam is a beam of coherent photons, such as a laser beam.
- Photons as discussed in this specification are inclusively defined to include wave energy as well as particle or photon energy per se.
- VLB VLB.
- An alternative example of measurement takes advantage of the property of certain MCLs of changing in resonant frequency when encountering an environmental material in an effective amount to accomplish a change in resonant frequency. This type of measurement can be carried out as follows. At least one microcantilever is provided that resonates at a different frequency when in the presence of an outgassed material. The microcantilever can be exposed to the outgassed material under conditions effective to cause the microcantilever to resonate at a different frequency. The different resonant frequency is then detected by any suitable means.
- the different resonant frequency can be detected by inputting energy to the microcantilever to induce it to resonate before and after exposing the microcantilever to outgassing.
- the differences between the resonant frequencies of the MCLbefore and after exposure to outgassing are determined.
- an MCL can be provided that is known to have a certain resonant frequency when in the presence of a sufficient concentration or quantity of an outgassed material.
- the different resonant frequency or the resonant frequency signaling the presence of a sufficient quantity of the outgassed material is detected using a harmonic vibration sensor.
- an MCL device can be incorporated into a quartz vacuum tube linked to a vessel and vacuum pump.
- a harmonic vibration sensor using a commercially available piezoresistive cantilever, Wheatstone bridge circuits, a positive feedback controller, an exciting piezoactuator and a phase-locked loop (PLL) demodulator can be constructed. See, e.g.,
- one side of the microcantilever can be coated with gelatin. See, e.g., Hans Peter Lang, Christoph Gerber, STM and AFM Studies on (Bio)molecular Systems: Unravelling the Nanoworld, Topics in Current Chemistry, Volume 285/2008. Water vapor desorbing from the evacuated coated vessel surface binds with the gelatin, causing the cantilever to bend and its resonant frequency to change, as measured by laser deflection from a surface of the cantilever. The change in mass of an uncoated vs coated vessel is contemplated to be resolvable in fractions of seconds and be highly reproducible.
- the articles cited above in connection with cantilever technology are incorporated here by reference for their disclosures of specific MCLs and equipment arrangements that can be used for detecting and quantifying outgassed species.
- the measurement cell 362 could be as illustrated above, using the main vacuum channel for PECVD as the bypass 386.
- the measurement cell generally indicated as 362 of FIG. 30 can be incorporated in a vessel holder such as 50 in which the bypass channel 386 is configured as the main vacuum duct 94 and the measurement cell 362 is a side channel.
- VLB This combination of the measurement cell 362 with the vessel holder 50 would optionally allow the outgassing measurement to be conducted without breaking the vacuum used for PECVD.
- the vacuum pump for PECVD would be operated for a short, preferably standardized amount of time to pump out some or all of the residual reactant gases remaining after the coating step (a pump-down of less than one Torr, with a further option of admitting a small amount of air, nitrogen, oxygen, or other gas to flush out or dilute the process gases before pumping down). This would expedite the combined processes of coating the vessel and testing the coating for presence and barrier level.
- VLB [725] VLB.
- outgassing measurements and all the other described barrier measurement techniques can be used for many purposes other than or in addition to determining the efficacy of a barrier layer.
- the test can be used on uncoated or coated vessels to determine the degree of outgassing of the vessel walls. This test can be used, for example, in cases in which an uncoated polymer is required to outgas less than a specified amount.
- VLB For another example, these outgassing measurements and all the other described barrier measurement techniques can be used on barrier coated or uncoated films, either as a static test or as an in-line test to measure variations in outgassing of a film as it traverses the measurement cell. The test can be used for determining the continuity or barrier efficacy of other types of coatings, such as aluminum coatings or EVOH barrier coatings or layers of packaging films. [727] VLB.
- outgassing measurements and all the other described barrier measurement techniques can be used to determine the efficacy of a barrier layer applied on the side of a vessel wall, film, or the like opposite the measurement cell, such as a barrier layer applied on the outside of a vessel wall and interrogated for outgassing to the interior of the vessel wall.
- the flow differential would be for permeation through the barrier coating followed by permeation through the substrate film or wall.
- This measurement would be particularly useful in instances where the substrate film or wall is quite permeable, such as a very thin or porous film or wall.
- VLB VLB
- VLB VLB
- VLB One test technique that can be used to increase the rate of testing for outgassing of a vessel, usable with any outgassing test embodiment in the specification, is to reduce the void volume of the vessel, as by inserting a plunger or closure into the vessel to reduce the void volume of the portion of the vessel tested. Decreasing the void volume allows the vessel to be pumped down more quickly to a given vacuum level, thus decreasing the test interval.
- barrier coating 90 (shown in FIG. 2, for example), which can be an SiO x coating applied to a thickness of at least 2 nm, or at least 4 nm, or at least 7 nm, or at least 10 nm, or at least 20 nm, or at least 30 nm, or at least 40 nm, or at least 50 nm, or at least 100 nm, or at least 150 nm, or at least 200 nm, or at least 300 nm, or at least 400 nm, or at least 500 nm, or at least 600 nm, or at least 700 nm, or at least 800 nm, or at least 900 nm.
- the coating can be up to 1000 nm, or at most 900 nm, or at most 800 nm, or at most 700 nm, or at most 600 nm, or at most 500 nm, or at most 400 nm, or at most 300 nm, or at most 200 nm, or at most 100 nm, or at most 90 nm, or at most 80 nm, or at most 70 nm, or at most 60 nm, or at most 50 nm, or at most 40 nm, or at most 30 nm, or at most 20 nm, or at most 10 nm, or at most 5 nm thick.
- the thickness of the SiO x or other coating can be measured, for example, by transmission electron microscopy (TEM), and its composition can be measured by X-ray photoelectron spectroscopy (XPS).
- TEM transmission electron microscopy
- XPS X-ray photoelectron spectroscopy
- Oxygen transmission is affected by the physical features of the coating, such as its thickness, the presence of cracks, and other physical details of the coating.
- Water transmission is believed to commonly be affected by chemical factors, i.e. the material of which the coating is made, more than physical factors. The inventors also believe that at least one of these chemical factors is a substantial concentration of OH moieties in the coating, which leads to a higher transmission rate of water through the barrier.
- An SiO x coating often contains OH moieties, and thus a physically sound coating containing a high proportion of OH moieties is a better barrier to oxygen than to water.
- a physically sound carbon-based barrier, such as amorphous carbon or diamond-like carbon (DLC) commonly is a better barrier to water than is a SiO x coating because the carbon-based barrier more commonly has a lower concentration of OH moieties.
- the concentration ratio of organic moieties (carbon and hydrogen compounds) to OH moieties in the deposited coating can be increased. This can be done, for example, by increasing the proportion of oxygen in the feed gases (as by increasing the oxygen feed rate or by lowering the feed rate of one or more other constituents).
- the lowered incidence of OH moieties is believed to result from increasing the degree of reaction of the oxygen feed with the hydrogen in the silicone source to yield more volatile water in the PECVD exhaust and a lower concentration of OH moieties trapped or incorporated in the coating.
- Distortion of the medical devices can be reduced or eliminated by employing the energy in a series of two or more pulses separated by cooling time, by cooling the vessels while applying energy, by applying the coating in a shorter time (commonly thus making it thinner), by selecting a frequency of the applied coating that is absorbed minimally by the base material selected for being coated, and/or by applying more than one coating, with time in between the respective energy application steps.
- high power pulsing can be used with a duty cycle of 1 millisecond on, 99 milliseconds off, while continuing to feed the process gas. The process gas is then the coolant, as it keeps flowing between pulses.
- Another alternative is to reconfigure the power applicator, as by adding magnets to confine the plasma increase the effective power application (the power that actually results in incremental coating, as opposed to waste power that results in heating or unwanted coating). This expedient results in the application of more coating-formation energy per total Watt-hour of energy applied. See for example U.S. Patent 5,904,952.
- An oxygen post-treatment of the coating can be applied to remove OH moieties from the previously-deposited coating. This treatment is also contemplated to remove residual volatile organosilicon compounds or silicones or oxidize the coating to form additional SiO x .
- the plastic base material tube can be preheated.
- a different volatile source of silicon such as hexamethyldisilazane (HMDZ)
- HMDZ hexamethyldisilazane
- changing the feed gas to HMDZ will address the problem because this compound has no oxygen moieties in it, as supplied.
- one source of OH moieties in the HMDSO-sourced coating is hydrogenation of at least some of the oxygen atoms present in unreacted HMDSO.
- a composite coating can be used, such as a carbon-based coating combined with SiO x . This can be done, for example, by changing the reaction conditions or by adding a substituted or unsubstituted hydrocarbon, such as an alkane, alkene, or alkyne, to the feed gas as well as an organosilicon-based compound. See for example U.S. Patent 5,904,952, which states in relevant part: "For example, inclusion of a lower hydrocarbon such as propylene provides carbon moieties and improves most properties of the deposited films (except for light transmission), and bonding analysis indicates the film to be silicon dioxide in nature. Use of methane, methanol, or acetylene, however, produces films that are silicone in nature.
- the inclusion of a minor amount of gaseous nitrogen to the gas stream provides nitrogen moieties in the deposited films and increases the deposition rate, improves the transmission and reflection optical properties on glass, and varies the index of refraction in response to varied amounts of N 2 .
- the addition of nitrous oxide to the gas stream increases the deposition rate and improves the optical properties, but tends to decrease the film hardness.”
- a diamond-like carbon (DLC) coating can be formed as the primary or sole coating deposited. This can be done, for example, by changing the reaction conditions or by feeding methane, hydrogen, and helium to a PECVD process. These reaction feeds have no oxygen, so no OH moieties can be formed.
- an SiO x coating can be applied on the interior of a tube or syringe barrel and an outer DLC coating can be applied on the exterior surface of a tube or syringe barrel.
- the SiO x and DLC coatings can both be applied as a single layer or plural layers of an interior tube or syringe barrel coating.
- the barrier or other type of coating 90 reduces the transmission of atmospheric gases into the vessel 80 through its interior surface 88. Or, the barrier or other type of coating 90 reduces the contact of the contents of the vessel 80 with the interior surface 88.
- the barrier or other type of coating can comprise, for example, SiO x , amorphous (for example, diamond-like) carbon, or a combination of these.
- Any coating described herein can be used for coating a surface, for example a plastic surface. It can further be used as a barrier layer, for example as a barrier against a gas or liquid, preferably against water vapor, oxygen and/or air. It can also be used for preventing or reducing mechanical and/or chemical effects which the coated surface would have on a compound or composition if the surface were uncoated. For example, it can prevent or reduce the precipitation of a compound or composition, for example insulin precipitation or blood clotting or platelet activation.
- VILA Evacuated Blood Collection Vessels
- the illustrated vessel 80 can be generally tubular, having an opening 82 at one end of the vessel, opposed by a closed end 84.
- the vessel 80 also has a wall 86 defining an interior surface 88.
- a medical sample tube such as an evacuated blood collection tube, as commonly is used by a phlebotomist for receiving a venipuncture sample of a patient's blood for use in a medical laboratory.
- the vessel 80 can be made, for example, of thermoplastic material.
- suitable thermoplastic material are polyethylene terephthalate or a polyolefin such as polypropylene or a cyclic polyolefin copolymer.
- the vessel 80 can be made by any suitable method, such as by injection molding, by blow molding, by machining, by fabrication from tubing stock, or by other suitable means. PECVD can be used to form a coating on the internal surface of SiO x .
- the vessel 80 desirably can be strong enough to withstand a substantially total internal vacuum substantially without deformation when exposed to an external pressure of 760 Torr or atmospheric pressure and other coating processing conditions.
- This property can be provided, in a thermoplastic vessel 80, by providing a vessel 80 made of suitable materials having suitable dimensions and a glass transition temperature higher than the processing temperature of the coating process, for example a cylindrical wall 86 having sufficient wall thickness for its diameter and material.
- a vessel 80 used as an evacuated blood collection tube should be able to withstand external atmospheric pressure, while internally evacuated to a reduced pressure useful for the intended application, without a substantial volume of air or other atmospheric gas leaking into the tube (as by bypassing the closure) or permeating through the wall 86 during its shelf life. If the as-molded vessel 80 cannot meet this requirement, it can be processed by coating the interior surface 88 with a barrier or other type of coating 90. It is desirable to treat and/or coat the interior surfaces of these devices (such as sample collection tubes and syringe barrels) to impart various properties that will offer advantages over existing polymeric devices and/or to mimic existing glass products. It is also desirable to measure various properties of the devices before and/or after treatment or coating.
- a process for applying a lubricity coating on a substrate comprising applying one of the described precursors on or in the vicinity of a substrate at a thickness of 1 to 5000 nm, optionally 10 to 1000 nm, optionally 10-200 nm, optionally 20 to 100 nm thick and crosslinking or polymerizing (or both) the coating, optionally in a PECVD process, to provide a lubricated surface.
- the coating applied by this process is also contemplated to be new.
- a coating or treatment is defined as "hydrophobic" if it lowers the wetting tension of a surface, compared to the corresponding uncoated or untreated surface. Hydrophobicity is thus a function of both the untreated substrate and the treatment.
- the degree of hydrophobicity of a coating can be varied by varying its composition, properties, or deposition method.
- a coating of SiOx having little or no hydrocarbon content is more hydrophilic than a coating of Si w O x CyH z with the substituent values as defined in this specification.
- a hydrophobic coating can be very thin, having a thickness of at least 4 nm, or at least 7 nm, or at least 10 nm, or at least 20 nm, or at least 30 nm, or at least 40 nm, or at least 50 nm, or at least 100 nm, or at least 150 nm, or at least 200 nm, or at least 300 nm, or at least 400 nm, or at least 500 nm, or at least 600 nm, or at least 700 nm, or at least 800 nm, or at least 900 nm.
- the coating can be up to 1000 nm, or at most 900 nm, or at most 800 nm, or at most 700 nm, or at most 600 nm, or at most 500 nm, or at most 400 nm, or at most 300 nm, or at most 200 nm, or at most 100 nm, or at most 90 nm, or at most 80 nm, or at most 70 nm, or at most 60 nm, or at most 50 nm, or at most 40 nm, or at most 30 nm, or at most 20 nm, or at most 10 nm, or at most 5 nm thick.
- thermoplastic tube wall made for example of polyethylene terephthalate (PET)
- PET polyethylene terephthalate
- the hydrophobic coating can be applied on top of a hydrophilic SiO x coating on the internal surface of the tube.
- the SiO x coating increases the barrier properties of the thermoplastic tube and the hydrophobic coating changes the surface energy of blood contact surface with the tube wall.
- the hydrophobic coating can be made by providing a precursor selected from those identified in this specification.
- the hydrophobic coating precursor can comprise hexamethyldisiloxane (HMDSO) or octamethylcyclotetrasiloxane (OMCTS).
- hydrophobic coating is to prepare a glass cell preparation tube.
- the tube has a wall defining a lumen, a hydrophobic coating in the internal surface of the glass wall, and contains a citrate reagent.
- the hydrophobic coating can be made by providing a precursor selected from those identified elsewhere in this specification.
- the hydrophobic coating precursor can comprise hexamethyldisiloxane (HMDSO) or octamethylcyclotetrasiloxane (OMCTS).
- HMDSO hexamethyldisiloxane
- OOMCTS octamethylcyclotetrasiloxane
- Another source material for hydrophobic coatings is an alkyl trimethoxysilane of the formula:
- VII.A.La Combinations of acid or base catalysis and heating, using an alkyl trimethoxysilane precursor as described above, can condense the precursor (removing ROH by-products) to form crosslinked polymers, which can optionally be further crosslinked via an alternative method.
- One specific example is by Shimojima et. al. J. Mater. Chem., 2007, 17, 658 - 663.
- a coating of Si w O x C y H z can be applied as a subsequent coating after applying an SiO x barrier coating to the interior surface 88 of the vessel 80 to provide a lubricity surface, particularly if the surface coating is a liquid organosiloxane compound at the end of the coating process.
- VII.A.1.a Optionally, after the coating of Si w O x CyH z is applied, it can be post- cured after the PECVD process.
- UV-initiated free radial or cationic
- E-beam electron-beam
- thermal as described in Development Of Novel Cycloaliphatic Siloxanes For Thermal And UV-Curable Applications (Ruby Chakraborty Dissertation, can 2008) be utilized.
- a lubricity coating is to use a silicone demolding agent when injection-molding the thermoplastic vessel to be lubricated.
- a silicone demolding agent when injection-molding the thermoplastic vessel to be lubricated.
- any of the demolding agents and latent monomers causing in-situ thermal lubricity coating formation during the molding process can be used.
- the aforementioned monomers can be doped into traditional demolding agents to accomplish the same result.
- a lubricity surface is particularly contemplated for the internal surface of a syringe barrel as further described below.
- a lubricated internal surface of a syringe barrel can reduce the plunger sliding force needed to advance a plunger in the barrel during operation of a syringe, or the breakout force to start a plunger moving after the prefilled syringe plunger has pushed away the intervening lubricant or adhered to the barrel, for example due to decomposition of the lubricant between the plunger and the barrel.
- a coating of Si w O x CyH z where w is 1 , x in this formula is from about 0.5 to about 2.4, y is from about 0.6 to about 3, and z is from 2 to about 9, also can be applied to the interior surface 88 of the vessel 80 to improve adhesion of a subsequent coating of SiO x .
- the coating 90 can comprise a layer of SiO x and a layer of SiwOxCyHz, where w is 1 , x in this formula is from about 0.5 to 2.4, y is from about 0.6 to about 3, and z is from 2 to about 9, preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9.
- the layer of Si w O x CyH z can be deposited between the layer of SiO x and the interior surface of the vessel.
- the layer of SiO x can be deposited between the layer of Si w O x C y H z and the interior surface of the vessel.
- the layer of SiO x can be deposited adjacent to the layer of Si w O x C y H z or remotely, with at least one intervening layer of another material.
- the layer of SiO x can be deposited adjacent to the interior surface of the vessel.
- the layer of Si w O x CyH z can be deposited adjacent to the interior surface of the vessel.
- a graded composite can be separate layers of Si w O x CyH z and SiO x with a transition or interface of intermediate composition between them, or separate layers of Si w O x C y H z and SiO x with an intermediate distinct layer of intermediate composition between them, or a single layer that changes continuously or in steps from a composition of Si w O x C y H z to a composition more like SiO x , going through the coating in a normal direction.
- the grade in the graded composite can go in either direction.
- the composition Si w O x C y H z can be applied directly to the substrate and graduate to a composition further from the surface of SiO x .
- the composition of SiO x can be applied directly to the substrate and graduate to a composition further from the surface of Si w O x C y H z .
- a graduated coating is particularly contemplated if a coating of one composition is better for adhering to the substrate than the other, in which case the better-adhering composition can, for example, be applied directly to the substrate.
- the more distant portions of the graded coating can be less compatible with the substrate than the adjacent portions of the graded coating, since at any point the coating is changing gradually in properties, so adjacent portions at nearly the same depth of the coating have nearly identical composition, and more widely physically separated portions at substantially different depths can have more diverse properties. It is also contemplated that a coating portion that forms a better barrier against transfer of material to or from the substrate can be directly against the substrate, to prevent the more remote coating portion that forms a poorer barrier from being contaminated with the material intended to be barred or impeded by the barrier. [767] VII.A.La.
- the coating instead of being graded, optionally can have sharp transitions between one layer and the next, without a substantial gradient of composition.
- Such coatings can be made, for example, by providing the gases to produce a layer as a steady state flow in a non-plasma state, then energizing the system with a brief plasma discharge to form a coating on the substrate. If a subsequent coating is to be applied, the gases for the previous coating are cleared out and the gases for the next coating are applied in a steady-state fashion before energizing the plasma and again forming a distinct layer on the surface of the substrate or its outermost previous coating, with little if any gradual transition at the interface.
- FIG. 768 Another embodiment is a cell preparation tube having a wall provided with a hydrophobic coating on its inside surface and containing an aqueous sodium citrate reagent.
- the hydrophobic coating may be also be applied on top of a hydrophilic SiO x coating on the internal surface of the tube.
- the SiO x coating increases the barrier properties of the thermoplastic tube and the hydrophobic coating changes the surface energy of blood contact surface with the tube wall.
- the wall is made of thermoplastic material having an internal surface defining a lumen.
- a blood collection tube according to the embodiment VII.A.I .b can have a first layer of SiO x on the internal surface of the tube, applied as explained in this specification, to function as an oxygen barrier and extend the shelf life of an evacuated blood collection tube made of thermoplastic material.
- a second layer of Si w O x C y H z where w is 1 , x in this formula is from about 0.5 to 2.4, y is from about 0.6 to about 3, and z is from 2 to about 9, preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9, can then be applied over the barrier layer on the internal surface of the tube to provide a hydrophobic surface.
- the coating is effective to reduce the platelet activation of blood plasma treated with a sodium citrate additive and exposed to the inner surface, compared to the same type of wall uncoated.
- PECVD is used to form a coating on the internal surface having the structure: Si w 0 ⁇ C y H z .
- the blood collection tube having a hydrophobic layer of Si w 0 ⁇ C y H z does not require a coating of baked on silicone on the vessel wall, as is conventionally applied to make the surface of the tube hydrophobic.
- Both layers can be applied using the same precursor, for example HMDSO or OMCTS, and different PECVD reaction conditions.
- a sodium citrate anticoagulation reagent is then placed within the tube and it is evacuated and sealed with a closure to produce an evacuated blood collection tube.
- the components and formulation of the reagent are known to those skilled in the art.
- the aqueous sodium citrate reagent is disposed in the lumen of the tube in an amount effective to inhibit coagulation of blood introduced into the tube.
- Another embodiment is a vessel having a wall at least partially enclosing a lumen.
- the wall has an interior polymer layer enclosed by an exterior polymer layer.
- One of the polymer layers is a layer at least 0.1 mm thick of a cyclic olefin copolymer (COC) resin defining a water vapor barrier.
- Another of the polymer layers is a layer at least 0.1 mm thick of a polyester resin.
- the wall includes an oxygen barrier layer of SiO x having a thickness of from about 10 to about 500 angstroms.
- the vessel 80 can be a double-walled vessel having an inner wall 408 and an outer wall 410, respectively made of the same or different materials.
- One particular embodiment of this type can be made with one wall molded from a cyclic olefin copolymer (COC) and the other wall molded from a polyester such as polyethylene terephthalate (PET), with an SiO x coating as previously described on the interior surface 412.
- COC cyclic olefin copolymer
- PET polyethylene terephthalate
- SiO x coating as previously described on the interior surface 412.
- a tie coating or layer can be inserted between the inner and outer walls to promote adhesion between them.
- the inner wall 408 can be made of PET coated on the interior surface 412 with an SiO x barrier layer, and the outer wall 410 can be made of COC.
- PET coated with SiO x is an excellent oxygen barrier, while COC is an excellent barrier for water vapor, providing a low water vapor transition rate (WVTR).
- WVTR water vapor transition rate
- This composite vessel can have superior barrier properties for both oxygen and water vapor.
- This construction is contemplated, for example, for an evacuated medical sample collection tube that contains an aqueous reagent as manufactured, and has a substantial shelf life, so it should have a barrier preventing transfer of water vapor outward or transfer of oxygen or other gases inward through its composite wall during its shelf life.
- the inner wall 408 can be made of COC coated on the interior surface 412 with an SiO x barrier layer, and the outer wall 410 can be made of PET.
- This construction is contemplated, for example, for a prefilled syringe that contains an aqueous sterile fluid as manufactured.
- the SiO x barrier will prevent oxygen from entering the syringe through its wall.
- the COC inner wall will prevent ingress or egress of other materials such as water, thus preventing the water in the aqueous sterile fluid from leaching materials from the wall material into the syringe.
- the COC inner wall is also contemplated to prevent water derived from the aqueous sterile fluid from passing out of the syringe (thus undesirably concentrating the aqueous sterile fluid), and will prevent non-sterile water or other fluids outside the syringe from entering through the syringe wall and causing the contents to become non-sterile.
- the COC inner wall is also contemplated to be useful for decreasing the breaking force or friction of the plunger against the inner wall of a syringe.
- Another embodiment is a method of making a vessel having a wall having an interior polymer layer enclosed by an exterior polymer layer, one layer made of COC and the other made of polyester.
- the vessel is made by a process including introducing COC and polyester resin layers into an injection mold through concentric injection nozzles.
- An optional additional step is applying an amorphous carbon coating to the vessel by PECVD, as an inside coating, an outside coating, or as an interlayer coating located between the layers.
- An optional additional step is applying an SiO x barrier layer to the inside of the vessel wall, where SiO x is defined as before.
- Another optional additional step is post-treating the SiO x layer with a process gas consisting essentially of oxygen and essentially free of a volatile silicon compound.
- the SiO x coating can be formed at least partially from a silazane feed gas.
- the vessel 80 shown in FIG. 36 can be made from the inside out, for one example, by injection molding the inner wall in a first mold cavity, then removing the core and molded inner wall from the first mold cavity to a second, larger mold cavity, then injection molding the outer wall against the inner wall in the second mold cavity.
- a tie layer can be provided to the exterior surface of the molded inner wall before over-molding the outer wall onto the tie layer.
- the vessel 80 shown in FIG. 36 can be made from the outside in, for one example, by inserting a first core in the mold cavity, injection molding the outer wall in the mold cavity, then removing the first core from the molded first wall and inserting a second, smaller core, then injection molding the inner wall against the outer wall still residing in the mold cavity.
- a tie layer can be provided to the interior surface of the molded outer wall before over-molding the inner wall onto the tie layer.
- the vessel 80 shown in FIG. 36 can be made in a two shot mold. This can be done, for one example, by injection molding material for the inner wall from an inner nozzle and the material for the outer wall from a concentric outer nozzle.
- a tie layer can be provided from a third, concentric nozzle disposed between the inner and outer nozzles. The nozzles can feed the respective wall materials simultaneously.
- One useful expedient is to begin feeding the outer wall material through the outer nozzle slightly before feeding the inner wall material through the inner nozzle. If there is an intermediate concentric nozzle, the order of flow can begin with the outer nozzle and continue in sequence from the intermediate nozzle and then from the inner nozzle. Or, the order of beginning feeding can start from the inside nozzle and work outward, in reverse order compared to the preceding description.
- VII.A.Le. Another embodiment is a vessel including a vessel, a barrier coating, and a closure.
- the vessel is generally tubular and made of thermoplastic material.
- the vessel has a mouth and a lumen bounded at least in part by a wall having an inner surface interfacing with the lumen.
- a closure covers the mouth and isolates the lumen of the vessel from ambient air.
- the vessel 80 can also be made, for example of glass of any type used in medical or laboratory applications, such as soda-lime glass, borosilicate glass, or other glass formulations. Other vessels having any shape or size, made of any material, are also contemplated for use in the system 20.
- One function of coating a glass vessel can be to reduce the ingress of ions in the glass, either intentionally or as impurities, for example sodium, calcium, or others, from the glass to the contents of the vessel, such as a reagent or blood in an evacuated blood collection tube.
- Another function of coating a glass vessel in whole or in part, such as selectively at surfaces contacted in sliding relation to other parts, is to provide lubricity to the coating, for example to ease the insertion or removal of a stopper or passage of a sliding element such as a piston in a syringe. Still another reason to coat a glass vessel is to prevent a reagent or intended sample for the vessel, such as blood, from sticking to the wall of the vessel or an increase in the rate of coagulation of the blood in contact with the wall of the vessel.
- a related embodiment is a vessel as described in the previous paragraph, in which the barrier coating is made of soda lime glass, borosilicate glass, or another type of glass.
- FIGS. 23-25 illustrate a vessel 268, which can be an evacuated blood collection tube, having a closure 270 to isolate the lumen 274 from the ambient environment.
- the closure 270 comprises a interior-facing surface 272 exposed to the lumen 274 of the vessel 268 and a wall-contacting surface 276 that is in contact with the inner surface 278 of the vessel wall 280.
- the closure 270 is an assembly of a stopper 282 and a shield 284.
- VII.A.2. Another embodiment is a method of applying a coating on an elastomeric stopper such as 282.
- the stopper 282, separate from the vessel 268, is placed in a substantially evacuated chamber.
- a reaction mixture is provided including plasma forming gas, i.e. an organosilicon compound gas, optionally an oxidizing gas, and optionally a hydrocarbon gas. Plasma is formed in the reaction mixture, which is contacted with the stopper.
- plasma forming gas i.e. an organosilicon compound gas, optionally an oxidizing gas, and optionally a hydrocarbon gas.
- a coating of Si w O x CyH z where w is 1 , x in this formula is from about 0.5 to 2.4, y is from about 0.6 to about 3, and z is from 2 to about 9, preferably where w is 1 , x is from about 0.5 to 1 , y is from about 2 to about 3, and z is from 6 to about 9, is deposited on at least a portion of the stopper.
- the wall-contacting surface 276 of the closure 270 is coated with a lubricity coating 286.
- the coating of Si w O x CyH z is effective to reduce the transmission of one or more constituents of the stopper, such as a metal ion constituent of the stopper, or of the vessel wall, into the vessel lumen.
- Certain elastomeric compositions of the type useful for fabricating a stopper 282 contain trace amounts of one or more metal ions. These ions sometimes should not be able to migrate into the lumen 274 or come in substantial quantities into contact with the vessel contents, particularly if the sample vessel 268 is to be used to collect a sample for trace metal analysis. It is contemplated for example that coatings containing relatively little organic content, i.e.
- y and z are low or zero, are particularly useful as a metal ion barrier in this application.
- silica as a metal ion barrier see, for example, Anupama Mallikarjunan, Jasbir Juneja, Guangrong Yang, Shyam P. Murarka, and Ton- Ming Lu, The Effect of lnterfacial Chemistry on Metal Ion Penetration into Polymeric Films, Mat. Res. Soc. Symp. Proc, Vol. 734, pp. B9.60.1 to B9.60.6 (Materials Research Society, 2003); U.S. Patents 5578103 and 6200658, and European Appl. EP0697378 A2, which are all incorporated here by reference. It is contemplated, however, that some organic content can be useful to provide a more elastic coating and to adhere the coating to the elastomeric surface of the stopper 282.
- the coating of Si w O x CyH z can be a composite of material having first and second layers, in which the first or inner layer 288 interfaces with the elastomeric stopper 282 and is effective to reduce the transmission of one or more constituents of the stopper 282 into the vessel lumen.
- the second layer 286 can interface with the inner wall 280 of the vessel and is effective to reduce friction between the stopper 282 and the inner wall 280 of the vessel when the stopper 282 is seated on or in the vessel 268.
- Such composites are described in connection with syringe coatings elsewhere in this specification.
- the first and second layers 288 and 286 are defined by a coating of graduated properties, in which the values of y and z are greater in the first layer than in the second layer.
- the coating of Si w O x CyH z can be applied, for example, by PECVD substantially as previously described.
- the coating of Si w O x CyH z can be, for example, between 0.5 and 5000 nm (5 to 50,000 Angstroms) thick, or between 1 and 5000 nm thick, or between 5 and 5000 nm thick, or between 10 and 5000 nm thick, or between 20 and 5000 nm thick, or between 50 and 5000 nm thick, or between 100 and 5000 nm thick, or between 200 and 5000 nm thick, or between 500 and 5000 nm thick, or between 1000 and 5000 nm thick, or between 2000 and 5000 nm thick, or between 3000 and 5000 nm thick, or between 4000 and 10,000 nm thick.
- Plasma coated lubricity layers versus the much thicker (one micron or greater) conventional spray applied silicone lubricants.
- Plasma coatings have a much lower migratory potential to move into blood versus sprayed or micron-coated silicones, both because the amount of plasma coated material is much less and because it can be more intimately applied to the coated surface and better bonded in place.
- Nanocoatings as applied by PECVD, are contemplated to offer lower resistance to sliding of an adjacent surface or flow of an adjacent fluid than micron coatings, as the plasma coating tends to provide a smoother surface.
- Still another embodiment is a method of applying a coating of SiwO ⁇ CyH z on an elastomeric stopper.
- the stopper can be used, for example, to close the vessel previously described.
- the method includes several parts.
- a stopper is placed in a substantially evacuated chamber.
- a reaction mixture is provided comprising plasma forming gas, i.e. an organosilicon compound gas, optionally an oxidizing gas, and optionally a hydrocarbon gas. Plasma is formed in the reaction mixture.
- the stopper is contacted with the reaction mixture, depositing the coating of Si w O x CyH z on at least a portion of the stopper.
- the reaction mixture can comprise a hydrocarbon gas, as further described above and below.
- the reaction mixture can contain oxygen, if lower values of y and z or higher values of x are contemplated.
- the reaction mixture can be essentially free of an oxidizing gas.
- the wall-contacting and interior facing surfaces 276 and 272 of the stopper 282 are essentially convex, and thus readily treated by a batch process in which a multiplicity of stoppers such as 282 can be located and treated in a single substantially evacuated reaction chamber. It is further contemplated that in some embodiments the coatings 286 and 288 do not need to present as daunting a barrier to oxygen or water as the barrier coating on the interior surface 280 of the vessel 268, as the material of the stopper 282 can serve this function to a large degree.
- the stopper 282 can be contacted with the plasma.
- the plasma can be formed upstream of the stopper 282, producing plasma product, and the plasma product can be contacted with the stopper 282.
- the plasma can be formed by exciting the reaction mixture with electromagnetic energy and/or microwave energy.
- the plasma forming gas can include an inert gas.
- the inert gas can be, for example, argon or helium, or other gases described in this disclosure.
- the organosilicon compound gas can be, or include, HMDSO, OMCTS, any of the other organosilicon compounds mentioned in this disclosure, or a combination of two or more of these.
- the oxidizing gas can be oxygen or the other gases mentioned in this disclosure, or a combination of two or more of these.
- the hydrocarbon gas can be, for example, methane, methanol, ethane, ethylene, ethanol, propane, propylene, propanol, acetylene, or a combination of two or more of these.
- VII.A.2.b Another embodiment is a method of applying a coating of a composition including carbon and one or more elements of Groups III or IV on an elastomeric stopper.
- a stopper is located in a deposition chamber.
- a reaction mixture is provided in the deposition chamber, including a plasma forming gas with a gaseous source of a Group III element, a Group IV element, or a combination of two or more of these.
- the reaction mixture optionally contains an oxidizing gas and optionally contains a gaseous compound having one or more C-H bonds.
- Plasma is formed in the reaction mixture, and the stopper is contacted with the reaction mixture.
- a coating of a Group III element or compound, a Group IV element or compound, or a combination of two or more of these is deposited on at least a portion of the stopper.
- FIG. 8 Another embodiment is a vessel including a vessel, a barrier coating, and a closure.
- the vessel is generally tubular and made of thermoplastic material.
- the vessel has a mouth and a lumen bounded at least in part by a wall.
- the wall has an inner surface interfacing with the lumen.
- An at least essentially continuous barrier coating is applied on the inner surface of the wall.
- the barrier coating is effective to provide a substantial shelf life.
- a closure is provided covering the mouth of the vessel and isolating the lumen of the vessel from ambient air.
- a vessel 268 such as an evacuated blood collection tube or other vessel is shown.
- the vessel is, in this embodiment, a generally tubular vessel having an at least essentially continuous barrier coating and a closure.
- the vessel is made of thermoplastic material having a mouth and a lumen bounded at least in part by a wall having an inner surface interfacing with the lumen.
- the barrier coating is deposited on the inner surface of the wall, and is effective to maintain at least 95%, or at least 90%, of the initial vacuum level of the vessel for a shelf life of at least 24 months, optionally at least 30 months, optionally at least 36 months.
- the closure covers the mouth of the vessel and isolates the lumen of the vessel from ambient air.
- closure for example the closure 270 illustrated in the Figures or another type of closure, is provided to maintain a partial vacuum and/or to contain a sample and limit or prevent its exposure to oxygen or contaminants.
- FIGS. 23-25 are based on figures found in U.S. Patent No. 6,602,206, but the present discovery is not limited to that or any other particular type of closure.
- VII.A.3. The closure 270 comprises a interior-facing surface 272 exposed to the lumen 274 of the vessel 268 and a wall-contacting surface 276 that is in contact with the inner surface 278 of the vessel wall 280.
- the closure 270 is an assembly of a stopper 282 and a shield 284.
- the stopper 282 defines the wall- contacting surface 276 and the inner surface 278, while the shield is largely or entirely outside the stoppered vessel 268, retains and provides a grip for the stopper 282, and shields a person removing the closure 270 from being exposed to any contents expelled from the vessel 268, such as due to a pressure difference inside and outside of the vessel 268 when the vessel 268 is opened and air rushes in or out to equalize the pressure difference.
- the coatings on the vessel wall 280 and the wall contacting surface 276 of the stopper can be coordinated.
- the stopper can be coated with a lubricity silicone layer, and the vessel wall 280, made for example of PET or glass, can be coated with a harder SiO x layer, or with an underlying SiO x layer and a lubricity overcoat.
- FIGS 20-22 Another example of a suitable vessel, shown in FIGS 20-22, is a syringe barrel 250 for a medical syringe 252.
- syringes 252 are sometimes supplied prefilled with saline solution, a pharmaceutical preparation, or the like for use in medical techniques.
- Pre-filled syringes 252 are also contemplated to benefit from an SiO x barrier or other type of coating on the interior surface 254 to keep the contents of the prefilled syringe 252 out of contact with the plastic of the syringe, for example of the syringe barrel 250 during storage.
- the barrier or other type of coating can be used to avoid leaching components of the plastic into the contents of the barrel through the interior surface 254.
- the front end 260 can optionally be capped and the plunger 258 optionally can be fitted in place before the prefilled syringe 252 is used, closing the barrel 250 at both ends.
- a cap 262 can be installed either for the purpose of processing the syringe barrel 250 or assembled syringe, or to remain in place during storage of the prefilled syringe 252, up to the time the cap 262 is removed and (optionally) a hypodermic needle or other delivery conduit is fitted on the front end 260 to prepare the syringe 252 for use.
- FIG. 42 also shows an alternative syringe barrel construction usable, for example, with the embodiments of FIGS. 21 , 26, 28, 30, and 34 and adapted for use with the vessel holder 450 of that Figure..
- FIG. 50 is an exploded view and FIG. 51 is an assembled view of a syringe.
- the syringe barrel can be processed with the vessel treatment and inspection apparatus of FIGS. 1 -22, 26-28, 33-35, 37-39, 44, and 53-54.
- VII. B.1. The installation of a cap 262 makes the barrel 250 a closed-end vessel that can be provided with an SiO x barrier or other type of coating on its interior surface 254 in the previously illustrated apparatus, optionally also providing a coating on the interior 264 of the cap and bridging the interface between the cap interior 264 and the barrel front end 260. Suitable apparatus adapted for this use is shown, for example, in FIG. 21 , which is analogous to FIG. 2 except for the substitution of the capped syringe barrel 250 for the vessel 80 of FIG. 2. VII. B.
- FIG. 52 is a view similar to FIG. 42, but showing a syringe barrel being treated that has no flange or finger stops 440.
- the syringe barrel is usable with the vessel treatment and inspection apparatus of FIGS. 1 -19, 27, 33, 35, 44-51 , and 53- 54.
- Still another embodiment is a vessel having a lubricity coating of SiwO ⁇ CyH z , of the type made by the following process.
- Vl I. B.1.a. A precursor is provided as defined above.
- any of the Embodiments VII.A.La.i optionally a plasma, optionally a non-hollow-cathode plasma, is formed in the vicinity of the substrate.
- the precursor is provided in the substantial absence of oxygen.
- the precursor is provided in the substantial absence of a carrier gas.
- the precursor is provided in the substantial absence of nitrogen.
- the precursor is provided at less than 1 Torr absolute pressure.
- the precursor is provided to the vicinity of a plasma emission.
- the precursor its reaction product is applied to the substrate at a thickness of 1 to 5000 nm thick, or 10 to 1000 nm thick, or 10-200 nm thick, or 20 to 100 nm thick.
- the substrate comprises glass.
- the substrate comprises a polymer, optionally a polycarbonate polymer, optionally an olefin polymer, optionally a cyclic olefin copolymer, optionally a polypropylene polymer, optionally a polyester polymer, optionally a polyethylene terephthalate polymer.
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- Medical Preparation Storing Or Oral Administration Devices (AREA)
- Chemical Vapour Deposition (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
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Abstract
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Claims
Priority Applications (29)
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RU2011150519/28A RU2523773C2 (en) | 2009-05-13 | 2010-05-12 | Gas release process for inspection of coated surfaces |
MX2011012042A MX350703B (en) | 2009-05-13 | 2010-05-12 | Outgassing method for inspecting a coated surface. |
JP2012510982A JP5710600B2 (en) | 2009-05-13 | 2010-05-12 | Gas release method for coating surface inspection |
BRPI1010569-7A BRPI1010569B1 (en) | 2009-01-25 | 2010-05-12 | METHOD FOR INSPECTING THE PRODUCT OF A COATING PROCESS |
AU2010249031A AU2010249031B2 (en) | 2009-05-13 | 2010-05-12 | Outgassing method for inspecting a coated surface |
SG2011083110A SG176011A1 (en) | 2009-05-13 | 2010-05-12 | Outgassing method for inspecting a coated surface |
CA2761905A CA2761905C (en) | 2009-05-13 | 2010-05-12 | Outgassing method for inspecting a coated surface |
NZ596997A NZ596997A (en) | 2009-05-13 | 2010-05-12 | Outgassing method for inspecting a coated surface |
CN2010800292014A CN102460131A (en) | 2009-05-13 | 2010-05-12 | Outgassing method for inspecting a coated surface |
JP2013510325A JP2013526710A (en) | 2010-05-12 | 2011-05-12 | Container gas emission inspection method |
EP18197314.0A EP3437743A1 (en) | 2010-05-12 | 2011-05-12 | Syringe with lubricity coating |
RU2012153671/28A RU2561759C2 (en) | 2010-05-12 | 2011-05-12 | Methods of inspection of gas emission vessels |
PCT/US2011/036358 WO2011143509A1 (en) | 2010-05-12 | 2011-05-12 | Vessel outgassing inspection methods |
EP11722664.7A EP2569611B1 (en) | 2010-05-12 | 2011-05-12 | Vessel outgassing inspection methods |
CA2799220A CA2799220C (en) | 2010-05-12 | 2011-05-12 | Vessel outgassing inspection methods |
NZ603471A NZ603471A (en) | 2010-05-12 | 2011-05-12 | Vessel outgassing inspection methods |
BR112012028897-0A BR112012028897B1 (en) | 2010-05-12 | 2011-05-12 | Methods for inspecting the product of a coating process |
KR1020127032502A KR101895367B1 (en) | 2010-05-12 | 2011-05-12 | Vessel outgassing inspection methods |
KR1020207026338A KR102273744B1 (en) | 2010-05-12 | 2011-05-12 | Vessel outgassing inspection methods |
MX2012013129A MX2012013129A (en) | 2010-05-12 | 2011-05-12 | Vessel outgassing inspection methods. |
CN2011800234615A CN102884412A (en) | 2010-05-12 | 2011-05-12 | Vessel outgassing inspection methods |
AU2011252925A AU2011252925A1 (en) | 2010-05-12 | 2011-05-12 | Vessel outgassing inspection methods |
KR1020197028540A KR102157254B1 (en) | 2010-05-12 | 2011-05-12 | A blood collection vessel |
KR1020187025058A KR102028690B1 (en) | 2010-05-12 | 2011-05-12 | Vessel outgassing inspection methods |
SG2012083077A SG185520A1 (en) | 2010-05-12 | 2011-05-12 | Vessel outgassing inspection methods |
IL215913A IL215913A (en) | 2009-05-13 | 2011-10-25 | Outgassing method for inspecting a coated surface |
ZA2011/07871A ZA201107871B (en) | 2009-05-13 | 2011-10-27 | Outgassing method for inspecting a coated surface |
IL222932A IL222932A0 (en) | 2010-05-12 | 2012-11-08 | Vessel outgassing inspection methods |
ZA2012/08501A ZA201208501B (en) | 2010-05-12 | 2012-11-12 | Vessel outgassing inspection methods |
Applications Claiming Priority (34)
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EP10162761.0 | 2010-05-12 | ||
EP10162761.0A EP2251455B1 (en) | 2009-05-13 | 2010-05-12 | PECVD coating using an organosilicon precursor |
EP10162758.6A EP2251671B1 (en) | 2009-05-13 | 2010-05-12 | Outgassing method for inspecting a coated surface |
EP10162757.8 | 2010-05-12 | ||
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EP10162755.2A EP2253735B1 (en) | 2009-05-13 | 2010-05-12 | Vessel processing |
EP10162760.2A EP2251454B1 (en) | 2009-05-13 | 2010-05-12 | Vessel coating and inspection |
EP10162755.2 | 2010-05-12 | ||
EP10162757.8A EP2251453B1 (en) | 2009-05-13 | 2010-05-12 | Vessel holder |
EP10162756.0A EP2251452B1 (en) | 2009-05-13 | 2010-05-12 | Pecvd apparatus for vessel coating |
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WO2010132589A2 true WO2010132589A2 (en) | 2010-11-18 |
WO2010132589A3 WO2010132589A3 (en) | 2011-03-31 |
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PCT/US2010/034586 WO2010132591A2 (en) | 2009-05-13 | 2010-05-12 | Pecvd coating using an organosilicon precursor |
PCT/US2010/034582 WO2010132589A2 (en) | 2009-01-25 | 2010-05-12 | Outgassing method for inspecting a coated surface |
PCT/US2010/034576 WO2010132584A2 (en) | 2009-05-13 | 2010-05-12 | Vessel holder |
PCT/US2010/034571 WO2010132581A2 (en) | 2009-05-13 | 2010-05-12 | Vessel coating and inspection |
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PCT/US2010/034568 WO2010132579A2 (en) | 2009-05-13 | 2010-05-12 | Vessel processing |
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PCT/US2010/034576 WO2010132584A2 (en) | 2009-05-13 | 2010-05-12 | Vessel holder |
PCT/US2010/034571 WO2010132581A2 (en) | 2009-05-13 | 2010-05-12 | Vessel coating and inspection |
PCT/US2010/034577 WO2010132585A2 (en) | 2009-05-13 | 2010-05-12 | Vessel processing |
PCT/US2010/034568 WO2010132579A2 (en) | 2009-05-13 | 2010-05-12 | Vessel processing |
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SG (2) | SG176011A1 (en) |
WO (6) | WO2010132591A2 (en) |
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WO2010132581A9 (en) | 2011-03-24 |
WO2010132585A2 (en) | 2010-11-18 |
SG176008A1 (en) | 2011-12-29 |
WO2010132579A3 (en) | 2011-03-31 |
WO2010132589A3 (en) | 2011-03-31 |
WO2010132579A2 (en) | 2010-11-18 |
WO2010132585A3 (en) | 2011-03-31 |
WO2010132584A2 (en) | 2010-11-18 |
WO2010132581A2 (en) | 2010-11-18 |
WO2010132591A3 (en) | 2011-05-05 |
KR102003651B1 (en) | 2019-07-24 |
KR20180011350A (en) | 2018-01-31 |
KR101823159B1 (en) | 2018-01-29 |
WO2010132591A2 (en) | 2010-11-18 |
KR20120060781A (en) | 2012-06-12 |
SG176011A1 (en) | 2011-12-29 |
WO2010132584A3 (en) | 2011-03-31 |
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