EP3887565A1 - Vorrichtung und verfahren zur plasmabehandlung von behältern - Google Patents
Vorrichtung und verfahren zur plasmabehandlung von behälternInfo
- Publication number
- EP3887565A1 EP3887565A1 EP19809047.4A EP19809047A EP3887565A1 EP 3887565 A1 EP3887565 A1 EP 3887565A1 EP 19809047 A EP19809047 A EP 19809047A EP 3887565 A1 EP3887565 A1 EP 3887565A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- gas
- process gas
- plasma
- container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- C23C16/04—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32917—Plasma diagnostics
- H01J37/32935—Monitoring and controlling tubes by information coming from the object and/or discharge
- H01J37/32981—Gas analysis
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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
- C23C16/22—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 deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/40—Oxides
- C23C16/401—Oxides containing silicon
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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
- C23C16/455—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 characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45512—Premixing before introduction in the reaction chamber
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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
- C23C16/455—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 characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45561—Gas plumbing upstream of the reaction chamber
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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
- C23C16/50—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
- C23C16/511—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 microwave 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32394—Treating interior parts of workpieces
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/3244—Gas supply means
- H01J37/32449—Gas control, e.g. control of the gas flow
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32798—Further details of plasma apparatus not provided for in groups H01J37/3244 - H01J37/32788; special provisions for cleaning or maintenance of the apparatus
- H01J37/32816—Pressure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/332—Coating
Definitions
- the invention relates to a device for plasma treatment of containers with the features of the preamble of claim 1.
- the invention also relates to a method for plasma treatment of containers with the features of the preamble of claim 11.
- Such a device and such a method are, for example, from WO 2017 / 102280 A2 known.
- the process gas generator of WO 2017/102280 A2 the process gas mixtures of 0 2 , Ar, HMDSO (hexamethyldisiloxane) and HMDSN (hexamethyldisilazane) are mixed.
- the process gas provided is metered from the gas phase by means of mass flow controllers and sucked through the coating stations due to the vacuum of the vacuum system.
- the process gas is converted in the coating stations to create a barrier layer in the bottles.
- the pressure conditions in the system are determined by several parameters: gas flow, pumping speed of the vacuum pumps and conductance values of the pipes (depending on pipe length and cross-section). If the parameters mentioned are known with sufficient accuracy, the pressure conditions can be calculated at any point in the system. In general, the highest absolute pressure prevails in the gas generator, the lowest is the suction pressure directly at the inlet of the vacuum pump (s).
- a special recipe is created for each bottle type to be coated, in which, among other things, the process gas mixture of 0 2 , Ar, HMDSO and HMDSN is defined. This mixture is not changed during the operation of the machine (with the selected recipe). Since the relevant pipelines do not change significantly, there are very stable pressure conditions during the coating operation or in the standby phases when no bottles are being coated in the device. The device is only released for the coating when a stable state in the vacuum system is reached. Due to the described stability of the system (pressure drop), the pressure values to be expected for a given recipe can be calculated and measured in the normal state. With a set process gas mixture, there is a characteristic pressure drop since the pipe conductance and the pumping speed of the device practically do not change.
- the absolute pressure in the gas generator may depend on the operating state of the system.
- the absolute pressure of the process gas mixture in the process gas generator is measured with pressure transducers that are independent of the gas type. For process control, it is evaluated whether the measured pressure is in a specified range.
- the pressure p acts, for example, on a membrane with a defined area A and deflects the membrane in proportion to the pressure.
- a sensor measures the deflection.
- the deflection is transferred via a mechanism to a pointer that moves over a pressure scale.
- Piezo-resistive or capacitive sensors record the pressure signal and convert it into an electrical signal.
- the pressure transducers that have so far been used exclusively have the disadvantage that they cannot detect gas compositions, which is why the process is carried out without taking the gas composition into account.
- Another disadvantage is that pressure sensors that are independent of the gas type are relatively expensive, which makes their use at all relevant measuring points of the plasma treatment device uneconomical, and that these pressure sensors may require the approval of the Federal Office of Economics and Export Control (BAFA).
- BAFA Federal Office of Economics and Export Control
- An object of the present invention is therefore to provide an apparatus and a method for plasma treatment of containers, which ensures improved process control with increased economy.
- the invention provides that the pressure measuring devices comprise gas type-dependent pressure sensors at least at a part of the predetermined points of the device.
- the gas type-dependent pressure measurement ensures that the properties of the respective gas can be inferred from the pressure value determined, for example the state of a gas mixture, ie its constancy or change. Such statements cannot be made using a gas type-independent pressure measurement.
- Pirani thermal conductivity vacuum meter Pieri measuring tube or measuring cell
- Pirani load cells have a gas type dependency due to the calorimetric measuring principle, in which the heat loss of a heated wire induced by the residual gas is measured. For this reason, the Pirani can is advantageously used as a gas-type-dependent pressure transducer in the present invention.
- a change in the process gas mixture can have a global cause, for example due to contaminated process raw materials, malfunction of the gas supply (flow control of the raw materials) or leaks in the gas generator. Local causes are also possible, in particular caused by leaks in the vacuum system. Furthermore, it is possible to differentiate global and local causes for a change in the process gas mixture by evaluating measurement signals measured by gas type-dependent pressure transducers and to limit the fault location responsible for this.
- gas type-dependent pressure sensor is used, at least for the plasma chamber of the coating station in the context of the pressure measuring device connected there.
- the gas type-dependent pressure measurement provided according to the invention can advantageously be combined with the gas type-independent pressure measurement known from the prior art and discussed in the introduction.
- the process gas composition when coating PET bottles with SiOx diffusion barriers can be determined and, if necessary, corrected in the event of measured deviations.
- the simultaneous measurement of the pressure as an absolute value by means of a pressure sensor that is independent of the gas type and as a value that is dependent on the gas type by means of a suitable pressure sensor enables the stoichiometry of the process gas to be determined in the process gas generator. In this way, fault patterns can be recorded, which can be caused by mass flow controllers (MFC). In addition, the stoichiometry of the process gas can be determined during production.
- MFC mass flow controllers
- the simultaneous measurement of the pressure as an absolute value and as a gas type-dependent value also makes it possible to recognize which gases are supplied by the respective mass flow controller. For example, a leak at the mass flow controllers can be detected during production. Finally, with the reduction of service times, the previously required test routine (Abliter routine) for the mass flow controller is no longer required.
- the relative deviation (the precursor concentration) between a pressure value measured by the gas type-independent pressure sensor and a pressure value measured by the gas type-dependent pressure sensor can advantageously be evaluated.
- the type of process influence can advantageously be determined from a pressure value measured by the gas type-dependent pressure sensor.
- a pressure value measured by the gas type-dependent pressure transducer can advantageously be combined with further measured values of the process detection in order to produce diagnoses to accelerate troubleshooting.
- Reliable coating of the interior of bottles if, in each case, mixtures of at least two gases (bonding agent: O2 / HMDSO, barrier: 0 2 / HMDSN, top coat: Ar / HMDSO) are used for the individual process segments bonding agent, barrier and top coat
- bonding agent O2 / HMDSO
- barrier 0 2 / HMDSN
- top coat Ar / HMDSO
- mass flow controllers used for gas metering set an incorrect gas flow due to a defect. Since there is no quick way to check the layer quality (permeation measurements usually take one to two days), it is essential to identify and correct deviations in the process gas composition that reduce the coating quality directly in the process.
- the gas composition can be monitored by using a gas type-dependent Pirani load cell.
- P b is the base pressure that occurs without gas flow and a (f) is a function that describes the pressure change as a function of gas flow f.
- the functions a'i (fi) and a ' 2 (f 2 ) can also be easily determined experimentally.
- the gas type independent measurement is preferably carried out by means of a membrane-based pressure transducer directly after mixing the process gas.
- the measurement of the gas type-dependent pressure using a Pirani load cell is advantageously carried out in the coating stations.
- the gas-independent pressure in the coating stations can be calculated using known piping values up to the station.
- Fig. 1 is a schematic block diagram of a preferred embodiment of a coating station of the inventive device for plasma treatment of containers and
- Fig. 2 is a schematic block diagram of a preferred embodiment of the process gas generator of the inventive device for plasma treatment of containers.
- FIG. 1 shows, by way of example, a schematic block diagram, by way of example, at a treatment station 40 of a coating station or plasma station 3, as can be arranged one or more times in a plasma chamber 17.
- the container 5 is inserted and positioned gas-tight and / or airtight in the chamber interior 4.
- a chamber base 30 has a vacuum channel 70.
- the vacuum channel 70 opens with its first side 70.1 in the plasma chamber 17 or, depending on the position of a gas lance 36, also creates a gas-permeable connection into the container interior 5.1 of the container 5.
- the container interior 5.1 is insulated, that is to say sealed, from the chamber interior 4, whereas in a lowered state of the gas lance 36 there is a gas-permeable connection between the container interior 5.1 of the container 5 and the chamber interior 4 is created.
- At least one first to fifth vacuum line 71 ... 75 and at least one ventilation line 76 can be closed, in particular the ventilation line 76 being designed to be switched on and off via a regulable and / or controllable valve device 76.1.
- each of the first to fifth vacuum lines 71 ... 75 can each comprise at least one controllable and / or controllable valve device 71.1 ... 75.1, the valve devices 71.1 ... 76.1 using a machine control of the device (not shown) for plasma treatment of containers 5 are formed from controllable.
- the first to fifth vacuum lines 71 ... 75 are preferably in a fluid-tight connection with a vacuum device 77 common to all vacuum lines 71 ... 75.
- the vacuum device 77 is in particular set up to generate the vacuum required in the plasma chamber 17 and the container interior 5.1 during the plasma treatment. Furthermore, the vacuum device 77 is set up to generate different negative pressures on the first to fifth vacuum lines 71 ... 75, that is to say negative pressure levels per vacuum line 71 ... 75.
- the fifth vacuum line 75 preferably has a larger vacuum, that is to say a lower vacuum level, than the first vacuum line 71. In particular, it is provided that the vacuum levels are further reduced with each vacuum line 71 ... 75, such that the lowest vacuum level prevails in the fifth vacuum line 75. Alternatively, however, it is also possible to connect the individual vacuum lines 71 ... 75 to separate vacuum devices 77.
- the plasma chamber 17 and / or the container interior 5.1 are lowered to different vacuum levels via the first to fifth vacuum lines 71 ... 75.
- the first vacuum line 71 with the valve device 71.1 open, lowers the plasma chamber 17 including the container interior 5.1 to a first vacuum level, while, for example, when the valve device 72.1 of the second vacuum line 72 is opened, a vacuum level which is lower than the first vacuum level is both reduced is created in the plasma chamber 17 as well as in the ter terraum 5.1.
- the fifth vacuum line 75 is designed as a process vacuum line which, in order to maintain the vacuum, is synchronous with the supply of a process gas is open during plasma treatment. The process vacuum line provided thus avoids the transfer of extracted process gas into the supply circuits of the further vacuum lines, for example the first to fourth vacuum lines 71 ... 74.
- the first to fifth vacuum lines 71 ... 75 can be assigned, for example, a pressure measuring device 78, which is designed to measure the pressure generated via the first to fifth vacuum lines 71 ... 75.
- the pressure measuring device 78 can be assigned an upstream valve device 78.1 and the pressure measuring device 78 can be arranged in a fluid connection of the second vacuum line 72 to the second side 70.2 of the vacuum channel 70.
- the gas lance 36 can be coupled via, for example, a central process gas line 80 to, for example, a first to third process gas line 81 ... 83, via which different process gas compositions in particular can be supplied to the container interior 5.1 by means of the gas lance 36.
- Each of the first to third process gas lines 81 ... 83 can also have at least one valve device 81.1 ... 83.1 which can be regulated and / or controlled, for example, via the central machine control of the device for plasma treatment of containers.
- the central process gas line 80 can therefore also comprise such a control and / or regulatable valve device 80.1.
- At least one bypass line 84 with its first side 84.1 which is also fluid-tight with its second side 84.2, is preferably branched off between the valve device 80.1 of the central process gas line 80 and the valve devices 81.1 ... 83.1 of the first to third process gas lines 81 ... 83 opens into one of the first to fifth vacuum lines 71 ... 75.
- the bypass line 84 is designed to discharge the process gas flowing in via the first to third process gas lines 81 ... 83 before it is fed into the plasma chamber 17 in the event of a malfunction of the coating station 3, advantageously in one of the first to fifth vacuum lines 71 ... 75.
- the bypass line 84 opens particularly advantageously with its second side 84.2 in a fluid-tight manner into the vacuum line of the central vacuum device 77 with the lowest vacuum level, according to the 1 in the fifth vacuum line 75.
- the bypass line 84 can also open in a fluid-tight manner in a separate vacuum device, not shown.
- the bypass line 84 comprises at least one valve device 84.3 that can be controlled and / or regulated via the central machine control of the device for plasma treatment, and at least one control and / or regulatable throttle device 84.4 for flow restriction or limitation of the volume flow of process gas flowing through the bypass line 84.
- the throttle device 84.4 can be designed as a control and / or adjustable sleeve slide valve and thus in particular to limit the volume flow of process gas flowing through the bypass line 84.
- the throttle device 84.4 is provided downstream of the valve device 84.3 in the flow direction indicated by arrows in the bypass line 84.
- the inner tube cross section of the bypass line 84 can be dimensioned particularly advantageously and / or set by means of the throttle device 84.4 in such a way that the volume flow of process gas derived by the bypass line 84 approximately corresponds to the volume flow of process gas which via the central process gas line 80 of the corresponding coating station 3 during is supplied with process gas.
- the inner tube cross-section of the bypass line 84 is selected or set by means of the throttle device 84.4 in such a way that in the bypass line 84 during the discharge of the process gas approximately the same vacuum conductance in the bypass line 84 as in the central process gas line 80 during the process gas supply was applied prevails for plasma treatment.
- a sixth vacuum line 85 with a first side 85.1 can be connected directly and in particular in a fluid-tight manner to the plasma chamber 17 or flow into it, and with a second side 85.2 with the interposition of a controllable and / or controllable valve device 85.3 via the fifth vacuum line 75 interact fluid-tight with the central vacuum device 77.
- the sixth vacuum line 85 is assigned a pressure measuring device 79 for measuring, in particular, the negative pressure within the plasma chamber 17.
- the pressure measuring device 79 has a gas type-dependent pressure sensor 86.
- the process quality in the coating station 3, especially a change in the process gas mixture can be determined from the pressure value measured by the gas type-dependent pressure sensor 86.
- the type of process influence can be determined from the pressure value measured by the gas type-dependent pressure sensor 86.
- a pressure value measured by the gas type-dependent pressure sensor 86 can be combined with further measured values of the process detection in order to produce diagnoses to accelerate troubleshooting.
- global and local causes can be distinguished by evaluating the pressure values of the gas type-dependent pressure transducers provided there, and errors can be restricted to one location.
- a typical treatment process at an exemplary coating station 3 without operational malfunction is explained below using the example of a coating process, the method for plasma treatment of containers 5 being carried out at a plurality of coating stations 3 with the respective treatment stations 40 on a device for plasma treatment having a plasma wheel.
- the respective container 5 is transported to the plasma wheel using an input wheel and, when a sleeve-like chamber wall is pushed up, the container 5 is inserted into the corresponding coating station 3. After the insertion process has been completed, the respective chamber wall at this coating station 3 is lowered into its sealed position, and first of all an evacuation of both the chamber interior 4 and the container interior 5.1 of the container 5 is carried out at the same time.
- the corresponding gas lance 36 is inserted into the container interior 5.1 of the container 5 and the container interior 5.1 is sealed off from the chamber interior 4 by displacement of the sealing element. It is also possible that the gas lance 36 is moved into the container 5 synchronously with the beginning of the evacuation of the chamber interior 4. The pressure in the container interior 5.1 can then be further reduced. In addition, it is also contemplated that the positioning movement of the gas lance 36 at least partially already parallel to the positioning of the chamber wall. After reaching a sufficiently low negative pressure, process gas is introduced into the container interior 5.1 of the container 5 at the corresponding coating station 3 and the plasma is ignited with the aid of a microwave generator. In particular, it can be provided that the plasma is used to deposit both an adhesion promoter on an inner surface of the container 5 and the actual barrier and protective layer made of silicon oxides.
- the gas lance 36 is removed again from the container interior 5.1. H. lowered, and synchronously or prior to the lowering of the gas lance 36, at least the container interior 5.1 of the container 5 and possibly the plasma chamber 17 are at least partially ventilated.
- the process gas of this at least one coating station 3, at which an operational malfunction prevails is derived by means of the bypass line 84 at the time of introducing or supplying the process gas to or into the corresponding plasma chamber 17.
- the process gas of this at least one coating station 3 at which an operational malfunction prevails is derived by means of the bypass line 84 at the time of introducing or supplying the process gas to or into the corresponding plasma chamber 17.
- the coating process can be operated or continued at the other coating stations 3 provided on the device for plasma treatment or their treatment stations 40 with a consistently high coating quality.
- the first and sixth valve devices 71.1 and 85.3 are opened, and thus the container interior 5.1 via the first and sixth vacuum lines 71 and 85, respectively and the chamber interior 4 of the plasma chamber 17 evacuated.
- the valve device 80.1 of the central process gas line 80 is preferably closed.
- the valve device 76.1 of the ventilation line 76 is fired during the evacuation of the container interior 5.1 and the plasma chamber 17.
- the second valve device 72.1 can be opened and the container interior 5.1 can thus be lowered to a lower pressure level via the second vacuum line 72.
- the container interior 5.1 and / or the plasma chamber 17 can also be lowered via the third or fourth vacuum line 73, 74 to further lower vacuum levels if this is necessary for the coating process.
- the corresponding valve devices 71.1 ... 75.1 can be closed.
- One or more of the first to third valve devices 81.1 ... 83.1 of the first to third process gas lines 81 ... 83 and the one or more of the first to third valve devices 81.1 Valve device 80.1 of the central process gas line 80 are opened and a process gas of a predetermined composition and a predetermined gas quantity, in particular the container interior 5.1, is supplied via the gas lance 36.
- the predetermined timing is compared to that of remaining coating stations 3 provided on the device 1 for plasma treatment 1, one or more of the first to third valve devices 81.1 ... 83.1 of the first to third process gas lines 81 ... 83 are opened, but the valve device 80.1 of the central process gas line 80 of this one, a loading malfunctioning coating station 3 is closed, whereby an inflow of the process gas into the corresponding plasma chamber 17 is not possible.
- This would supply the at least one coating station 3 with a malfunction with a process gas quantity which corresponds to the process gas quantity predetermined for this coating station 3 in the intact operation.
- the valve device is upstream of the at least one coating station 3 which has a malfunction, at the same time or briefly 84.3 opened and the process gas derived via the bypass line 84.
- the valve device 80.1 of the central process gas line 80 is closed at the time the valve device 84.3 of the bypass line 84 is opened, such that the process gas provided via the central process gas supply unit is via the bypass line 84 of the central vacuum device 77 is fed.
- the process gas is discharged via the fifth vacuum line 75.
- the process gas can be fed to the coating stations 3 or the respective treatment station 40 via a rotary distributor provided in the center of the plasma wheel, the actual process gas distribution being able to take place via ring lines.
- the microwave generator ignites the plasma in the container interior 5.1 of the container 5.
- the valve device 81.1 of the first process gas line 81 closes at a predetermined time, while the valve device 82.1 of the second process gas line 82 for supplying a process gas a second composition is opened.
- the fifth valve device 75.1 and / or the sixth valve device 85.3 can also be used be opened in order to maintain a sufficiently low negative pressure, in particular in the container interior 5.1 and / or the process chamber 17.
- a pressure level of approx. 0.3 mbar proves to be expedient here.
- valve devices 81.1 ... 83.1 of the first to third process gas lines 81 ... 83 and all valve devices 71.1 ... 75.1, 85.3 of the first to sixth vacuum lines 71 ... 75, 85 that are still open at this time are closed , while the valve device 76.1 of the ventilation line 76 is opened and at least the container interior 5.1 of the container 5 is at least partially ventilated at least one treatment station 40 of the coating station 3 after the plasma treatment.
- the container interior 5.1 of the container 5 is preferably aerated to atmospheric pressure.
- the ventilation is preferably carried out via the gas lance 36 in the container interior 5.1.
- the gas lance 36 can be lowered from the container interior 5.1.
- the opened valve device 76.1 of the ventilation line 76 is closed.
- the ventilation time per container 5 is between 0.1 and 0.4 seconds, preferably about 0.2 seconds.
- the chamber wall is raised again. The coated container 5 is then removed or transferred to an output wheel.
- FIG. 2 shows a schematic block diagram of an embodiment of the process gas generator 100, which supplies the coating station 3 of FIG. 1 with process gases of different compositions.
- Oxygen is supplied to the process gas generator 100 via a line 87.
- Argon is fed to the process gas generator 100 via a line 88.
- HMDSN is fed to process gas generator 100 via line 89 and HMDSO 100 is fed to process gas generator 100 via line 90.
- Valves for metering or for blocking the respective gas supply are arranged in lines 87 to 90.
- the process gas generator 100 comprises three gas mixing units 91, 92 and 93 for providing process gases of different compositions and two gas heating cylinders 94 and 95.
- the gas heating cylinder 94 is charged with the HMDSO, which is available at the outlet of the cylinder 94 at a temperature and a pressure which are suitable for the mixing of the gases in the gas mixing unit 91 and 93, to which the heated HMDSO is supplied via pipelines equipped with check valves becomes.
- the gas heating cylinder 95 is charged with the HDMSN, which is available at the outlet of the cylinder 95 with a temperature and a pressure which are suitable for the mixing of the gases in the gas mixing unit 92, to which the heated HMDSN is fed via a pipeline equipped with a check valve becomes.
- the gas mixing unit 91 is supplied with oxygen and argon via pipelines provided with check valves.
- the gas mixing unit 93 is supplied with argon via a pipeline.
- the gas mixing unit 92 is supplied with oxygen and argon via pipelines.
- the gas mixing units 91, 92 and 93 each contain several mass flow controllers (MFC) and valves for the targeted mixing of the gases supplied to them. The gas mixtures are available as process gases at the outlets of the gas mixing units 91, 92 and 93.
- MFC mass flow controllers
- the process gas at the outlet of the gas mixing unit 91 is a gaseous adhesion promoter
- the process gas at the outlet of the gas mixing unit 92 is a barrier gas
- the process gas at the outlet of the gas mixing unit 93 is a top coat gas.
- the pressure of the respective process gases is measured in lines 81, 82 and 83 by pressure measuring devices 96, 97 and 98, which in addition to a gas type-independent pressure sensor 99 each comprise a gas type-dependent pressure sensor 86 which, among other things, controls the process gas composition to determine the relative deviation (precursor Concentration) between the pressure values measured by the two pressure transducers 86, 99.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Vapour Deposition (AREA)
- Plasma Technology (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018129694.0A DE102018129694A1 (de) | 2018-11-26 | 2018-11-26 | Vorrichtung und Verfahren zur Plasmabehandlung von Behältern |
| PCT/EP2019/082169 WO2020109145A1 (de) | 2018-11-26 | 2019-11-22 | Vorrichtung und verfahren zur plasmabehandlung von behältern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3887565A1 true EP3887565A1 (de) | 2021-10-06 |
Family
ID=68655537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19809047.4A Pending EP3887565A1 (de) | 2018-11-26 | 2019-11-22 | Vorrichtung und verfahren zur plasmabehandlung von behältern |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20220028671A1 (de) |
| EP (1) | EP3887565A1 (de) |
| CN (1) | CN113631753A (de) |
| DE (1) | DE102018129694A1 (de) |
| WO (1) | WO2020109145A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020130917A1 (de) | 2020-11-23 | 2022-05-25 | Khs Corpoplast Gmbh | Mehrweg-Kunststoffbehälter, Verfahren zum Waschen von solchen Behältern, Verfahren zum Beschichten von solchen Behältern und Behälterbehandlungsmaschine für die Getränkeindustrie |
| DE102023103802A1 (de) * | 2023-02-16 | 2024-08-22 | Khs Gmbh | Vorrichtung und Verfahren zur Versorgung einer Anlage zur Beschichtung von Werkstücken mit für den Beschichtungsprozess benötigten Prozessgasen |
| DE102023117131A1 (de) * | 2023-06-29 | 2025-01-02 | Khs Gmbh | Vorrichtung zur Versorgung einer Beschichtungsanlage mit benötigten Prozessgasen und Verfahren zum Betreiben einer solchen Gasversorgungsvorrichtung |
| DE102023132995A1 (de) | 2023-11-27 | 2025-05-28 | Khs Gmbh | Verfahren zum Beschichten von Mehrwegbehältern, nach diesem Verfahren hergestellte Behälter und Behälterbeschichtungsmaschine zum Beschichten von Mehrweg-Kunststoffbehältern |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH513399A (de) * | 1971-02-11 | 1971-09-30 | Balzers Patent Beteilig Ag | Anordnung zur Bestimmung der Menge an Wasserstoff in einem Gemisch mit anderen gasförmigen Stoffen |
| JPH04295089A (ja) * | 1991-03-26 | 1992-10-20 | Kokusai Chodendo Sangyo Gijutsu Kenkyu Center | 酸化物超電導膜製造装置 |
| JP3531736B2 (ja) * | 2001-01-19 | 2004-05-31 | オリエンタルエンヂニアリング株式会社 | 浸炭方法及び浸炭装置 |
| JP2003303777A (ja) * | 2002-04-10 | 2003-10-24 | Ulvac Japan Ltd | プラズマ成膜装置及びクリーニング方法 |
| US20060107898A1 (en) * | 2004-11-19 | 2006-05-25 | Blomberg Tom E | Method and apparatus for measuring consumption of reactants |
| US8394454B2 (en) * | 2008-03-08 | 2013-03-12 | Omniprobe, Inc. | Method and apparatus for precursor delivery system for irradiation beam instruments |
| US20100174245A1 (en) * | 2009-01-08 | 2010-07-08 | Ward Dean Halverson | System for pretreating the lumen of a catheter |
| JP2012046780A (ja) * | 2010-08-25 | 2012-03-08 | Tokyo Electron Ltd | 蒸着処理装置および蒸着処理方法 |
| JP6513379B2 (ja) * | 2014-12-05 | 2019-05-15 | 株式会社アルバック | 真空乾燥の終点検知方法及び真空乾燥装置 |
| DE102015121773B4 (de) * | 2015-12-14 | 2019-10-24 | Khs Gmbh | Verfahren und Vorrichtung zur Plasmabehandlung von Behältern |
| DE102016105548A1 (de) * | 2016-03-24 | 2017-09-28 | Khs Plasmax Gmbh | Verfahren und Vorrichtung zur Plasmabehandlung von Behältern |
-
2018
- 2018-11-26 DE DE102018129694.0A patent/DE102018129694A1/de active Pending
-
2019
- 2019-11-22 CN CN201980090302.3A patent/CN113631753A/zh active Pending
- 2019-11-22 WO PCT/EP2019/082169 patent/WO2020109145A1/de not_active Ceased
- 2019-11-22 US US17/296,265 patent/US20220028671A1/en not_active Abandoned
- 2019-11-22 EP EP19809047.4A patent/EP3887565A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018129694A1 (de) | 2020-05-28 |
| CN113631753A (zh) | 2021-11-09 |
| US20220028671A1 (en) | 2022-01-27 |
| WO2020109145A1 (de) | 2020-06-04 |
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