WO2015177916A1 - 薄膜の成膜方法及び成膜装置 - Google Patents
薄膜の成膜方法及び成膜装置 Download PDFInfo
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- WO2015177916A1 WO2015177916A1 PCT/JP2014/063655 JP2014063655W WO2015177916A1 WO 2015177916 A1 WO2015177916 A1 WO 2015177916A1 JP 2014063655 W JP2014063655 W JP 2014063655W WO 2015177916 A1 WO2015177916 A1 WO 2015177916A1
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- film
- pressure
- solution
- substrate
- film forming
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
- B05B14/20—Arrangements for collecting, re-using or eliminating excess spraying material from moving belts, e.g. filtering belts or conveying belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/60—Ventilation arrangements specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0493—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases using vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
- B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
- C03C17/30—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material with silicon-containing compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2203/00—Other substrates
- B05D2203/30—Other inorganic substrates, e.g. ceramics, silicon
- B05D2203/35—Glass
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/76—Hydrophobic and oleophobic coatings
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/10—Deposition methods
- C03C2218/15—Deposition methods from the vapour phase
Definitions
- the present invention relates to a film forming method and apparatus capable of forming a thin film in a vacuum.
- the thin film include an organic film and an inorganic film.
- a film forming method for forming an organic film or an inorganic film as an example of a thin film on the surface of a substrate it is known to use a wet method such as a coating method or a dipping method.
- a flaw of 10 to 400 nm in depth is formed on the surface of a substrate such as glass or plastic in the air so as to have a fine concavo-convex surface in a predetermined direction, and thereafter
- a film forming method in which an antifouling film (organic film) having a predetermined composition is formed on the fine concavo-convex surface by applying and drying a coating liquid (dilute solution) prepared in a composition.
- Patent Document 2 titanium oxide particles are mixed with water to obtain a suspension, and after adjusting to a specific pH, the suspension is applied to a support and dried to obtain an inorganic titanium oxide film (inorganic A film formation method for forming a film) has been proposed.
- a dilute solution having a low solute concentration is used as the coating solution or suspension used in the wet method. For this reason, there is a problem that the density of the film obtained after heat drying is lowered, and the function of the formed film is easily lost. For example, in an antifouling film coated by a wet method, the film formed on the outermost surface is easily scraped off by wiping, and its oil repellency may be lost.
- a film forming method and apparatus capable of forming a thin film having durability at a low cost.
- discharge means that the liquid is ejected as it is.
- discharge includes “spraying” in which liquid is sprayed and ejected.
- ejection the physical state and chemical state of the raw material in the liquid do not change before and after the ejection. Therefore, “ejection” is different in principle from vapor deposition in which the physical state of the raw material changes from liquid or solid to gas and CVD in which the chemical state of the raw material changes.
- the solution When the inventors discharge a solution in an atmosphere of a specific pressure (Pc) set based on the vapor pressures (P1, P2, P3%) Of two or more kinds of materials constituting the solution, the solution It was found that a durable thin film can be formed even if the solute concentration is low (that is, even if the solution to be discharged is a dilute solution). Further, the above-mentioned specific pressure Pc for discharging the solution often belongs to a medium vacuum region or a low vacuum region, and therefore, a thin film having durability as compared with a vapor deposition method that needs to create a high vacuum condition during film formation. Has been found to be able to form a film at a low cost, and the present invention has been completed.
- Pc specific pressure set based on the vapor pressures
- a thin film forming method having the following configuration is provided.
- This film forming method is premised on forming a thin film on a substrate in a vacuum.
- a solution containing two or more kinds of materials for example, the first material (S1), the second material (S2), the third material (S3),.
- Pressure (Pc) set based on the vapor pressure (eg, P1, P2, P3,..., Etc.) of each material (eg, S1, S2, S3,..., Etc.). ) In the atmosphere of (2).
- a thin film deposition apparatus having the following configuration.
- This film forming apparatus is premised on use for forming a thin film on a substrate in a vacuum, and a vacuum container in which a substrate as a film forming target is disposed, and an exhaust means for exhausting the inside of the vacuum container, A storage container that stores a solution containing two or more kinds of materials, and a nozzle that discharges the solution to a substrate disposed inside the vacuum container.
- Pc pressure
- each material constituting the solution to be discharged onto the substrate has a first material (S1) and a vapor pressure (P2) higher than the vapor pressure (P1) of S1.
- the pressure (Pc) under the atmosphere for discharging the solution is preferably higher than P1 and lower than P2.
- the pressure (Pc) under the atmosphere for discharging the solution is set to P1 or less or P2 or more, a thin film that is recognized as having practical durability can be formed.
- the substrate as a film formation target can be arranged below the inside of the vacuum vessel (that is, below the vertical direction) or on the side inside the vacuum vessel (ie, the side in the horizontal direction).
- the tip of the nozzle (discharge unit) may be installed so that the solution can be discharged downward (vertically, obliquely, no matter what) when the substrate is placed below the inside of the vacuum vessel (hereinafter simply referred to as “solution discharge direction”). It is also possible to install the solution so that the solution can be discharged sideways (horizontal or diagonally is not important) when the substrate is placed on the side of the inside of the vacuum vessel (hereinafter simply referred to as “solution discharge”). It is also said that the direction is “landscape”.) That is, in the second invention, the installation position of the discharge unit is not limited. The same applies to the first invention, and the solution discharge direction may be either downward or lateral.
- an in-line method including a transport mechanism for transporting the substrate may be used.
- the productivity is improved, which is beneficial.
- the first invention it is set based on the vapor pressure (for example, P1 of S1, P2 of S2, etc., where P1 ⁇ P2) of each material (for example, S1, S2, etc.) that is a constituent material of the solution discharged onto the substrate
- Pc for example, pressure higher than P1 (P1 ⁇ Pc) and lower than P2 (Pc ⁇ P2)
- Pc for example, pressure higher than P1 (P1 ⁇ Pc) and lower than P2 (Pc ⁇ P2)
- the solution constituted by two or more kinds of materials when the pressure in the vacuum container becomes the pressure Pc set based on the vapor pressure of each material that is a constituent material of the solution discharged to the substrate, the solution constituted by two or more kinds of materials was configured to be discharged from a nozzle to a film formation target (substrate). Even if the solution is discharged when the pressure in the vacuum container is Pc, the volatilization of S2 occurs, but this does not occur in S1. For this reason, the thin film formed on the substrate has a high density. That is, according to the second invention, a thin film having durability can be formed at low cost.
- the present invention it is possible to further improve the durability of the obtained thin film by adjusting the solute concentration of the solution to be discharged appropriately (for example, 0.01% by weight or more), and the thin film composition. Further cost reduction of the membrane can be realized.
- FIG. 1 is a schematic sectional view showing an example of a film forming apparatus capable of realizing the method of the present invention.
- a film forming apparatus 1 as an example of the apparatus of the present invention includes a vacuum container 11 in which a substrate 100 as a film forming target is disposed.
- the vacuum vessel 11 is formed of a substantially rectangular parallelepiped hollow body, but the present invention is not limited to this shape.
- the vacuum pump 15 may be a pump capable of creating a vacuum state from atmospheric pressure to medium vacuum (0.1 Pa to 100 Pa) such as a rotary pump (oil rotary vacuum pump) in this example.
- a vacuum state of high vacuum less than 0.1 Pa
- TMP turbo molecular pump
- oil diffusion pump it is not necessary to use a pump with high introduction cost. Therefore, in this example, the apparatus cost can be reduced.
- the vacuum pump 15 is operated by a command from the controller 16 (control means), and the degree of vacuum (pressure) in the container 11 is reduced through the pipe 13.
- the vacuum vessel 11 is provided with pressure detection means 18 (such as a pressure gauge) for detecting the pressure inside the vessel 11. Information on the pressure in the container 11 detected by the pressure detection means 18 is sequentially output to the controller 16.
- the controller 16 determines that the internal pressure of the container 11 has reached a predetermined value, an operation command is sent to the gas supply source 29 (described later).
- a pressure control unit such as an auto pressure controller (automatic pressure controller (APC)
- APC automatic pressure controller
- MFC mass flow controller
- the pressure in the container 11 can be controlled by introducing a gas such as argon into the container 11.
- a valve (not shown) is provided in the middle of the pipe 13 connecting the exhaust port of the container 11 and the pump 15, and the pressure in the container 11 is controlled by adjusting the opening of the valve while the pump 15 is operated. You may make it the structure to carry out.
- an opening / closing door (not shown) as an openable / closable separating means is provided below the side wall of the vacuum vessel 11, and a load lock chamber (not shown) is connected via the opening / closing door. it can.
- one end of the nozzle 17 is inserted downward inside the vacuum container 11, and the other end of the nozzle 17 is exposed to the outside of the container 11.
- a discharge portion 19 is connected to one end of the nozzle 17 existing inside the container 11.
- the number (number) of nozzles 17 inserted into the container 11 is not limited. Depending on the size of the container 11, a plurality of nozzles 17 may be used for a single container 11.
- the film forming agent solution 21 is sprayed in a full cone shape or a fan shape at an angle ⁇ of, for example, 30 degrees to 80 degrees with respect to the central axis.
- the discharge unit 19 may be configured to be possible. For example, several hundred ⁇ m-sized solution-like particles are discharged from the discharge unit 19.
- the other end of the nozzle 17 exposed to the outside of the container 11 is connected to the other end of a liquid feeding pipe 25 whose one end is inserted into a storage container 23 for hermetically containing the film forming agent solution 21.
- a liquid feeding pipe 25 whose one end is inserted into a storage container 23 for hermetically containing the film forming agent solution 21.
- one end of a gas supply pipe 27 for pressurizing the liquid level in the container 23 is connected to the storage container 23, and a gas supply source 29 is connected to the other end.
- the gas supply source 29 operates in response to a command from the controller 16 and supplies gas into the pipe 27 so that the liquid level of the storage container 23 is pressurized.
- the liquid level of the storage container 23 is pressurized, and in this example, the film forming agent solution 21 is pressure fed into the liquid feeding pipe 25.
- a substrate holder 31 that holds a substrate 100 as a film formation target is disposed below the inside of the vacuum vessel 11.
- the substrate holder 31 is supported by a transport mechanism including a plurality of rollers 33, 33,..., And the substrate holder 31 can move in the container 11 by the operation of the transport mechanism. .
- the movement here includes rotation in addition to linear movement (this example).
- the substrate holder 31 may be configured in a turntable format.
- the inner surface of the substrate holder 31 has a concave substrate holding surface. When the film is formed, the rear surface of the substrate 100 (single or plural) is to be brought into contact therewith. The substrate 100 is held.
- the distance D between the discharge unit 19 and the substrate 100 is not particularly limited as long as the film forming agent solution 21 discharged in liquid form from the discharge unit 19 can reach the substrate 100 as a liquid.
- the distance from the discharge unit 19 at which the film forming agent solution 21 can reach the substrate 100 is included in the direction of the discharge unit 19, the initial speed of the film forming solution 21 when discharged from the discharge unit 19, and the film forming agent solution 21. This is because the second material (S2, which will be described later) fluctuates due to various factors such as the vapor pressure (P2) at room temperature.
- the obtained thin film has sufficient film strength. It is easy to improve the durability level.
- a sufficient effective discharge area of the film forming agent solution 21 is ensured by arranging the discharge unit 19 so that the distance D to the substrate 100 is 150 mm or more. This contributes to suppression of wasteful consumption of the film forming agent solution 21 and, as a result, can further contribute to cost reduction of the film formation.
- the film-forming agent solution 21 is discharged downward, if the distance D is too far, the diluent (solvent) of the film-forming agent solution 21 volatilizes in the middle of discharge, and after the substrate reaches the substrate. Leveling is less likely to occur, resulting in non-uniform film distribution and reduced film performance. If the distance D is too short, the effective discharge area is narrowed accordingly, so that the film forming agent solution 21 is wasted, and film unevenness may occur.
- the controller 16 has a container internal pressure control function that first operates the vacuum pump 15 and the pressure detection means 18 to adjust the degree of vacuum inside the container 11 (that is, the pressure at the start of film formation) to an appropriate state. Along with this, a liquid level pressurizing pressure control function for adjusting the pressure applied by the gas supplied from the gas supply source 29 to the liquid level in the storage container 23 is also provided.
- the controller 16 also has a function of controlling the operation and stop of the transport mechanism including a plurality of rollers 33 and the like.
- a film forming agent solution 21 is prepared.
- the film-forming agent solution 21 is composed of a solution containing two kinds of materials, the first material (S1) and the second material (S2), is exemplified, and S1 is a solute (a component dissolved in a solvent).
- S2 will be described below as a solvent (a component that dissolves a solute. Liquid).
- the solute includes not only solids such as powder but also liquids.
- the solution 21 is composed of a mixed system of liquid and liquid, a component having a large amount or ratio in the solution 21 is a solvent, and in this example, S2 is configured.
- Examples of thin films include organic films and inorganic films. Also included are organic-inorganic hybrid films formed from materials having both organic and inorganic components. Examples of such a thin film include an antifouling film, a waterproof film, a moisture proof film, an organic EL film, a titanium oxide film, and the like.
- a hydrophobic reactive organic compound Organic compounds having at least one hydrophobic group and at least one reactive group capable of bonding to a hydroxyl group in one molecule
- waterproof materials for example, waterproof materials, moisture-proof materials, organic EL materials, titanium oxide, and the like.
- the hydrophobic reactive organic compound that is the solute S1 capable of forming an antifouling film which is an example of an organic-inorganic hybrid film, includes an organosilicon compound containing a polyfluoroether group or a polyfluoroalkyl group.
- organosilicon compound containing a polyfluoroether group or a polyfluoroalkyl group examples include Canon Optron's OF-SR (oil repellent) and OF-110 (water repellent).
- the vapor pressure (P1) at room temperature is low, for example, around 10 ⁇ 4 Pa or less (preferably about 0.8 ⁇ 10 ⁇ 5 Pa to 3 ⁇ 10 ⁇ 4 Pa, More preferably, a substance (liquid at normal temperature) of 10 ⁇ 4 Pa or less is selected.
- the usable solvent S2 is not particularly limited as long as the solute S1 can be dissolved.
- a hydrophobic reactive organic compound containing fluorine is used as the solute S1
- the affinity is increased, and therefore a solvent containing fluorine (fluorinated solvent) is preferably used.
- fluorine-based solvent examples include fluorine-modified aliphatic hydrocarbon solvents (perfluoroheptane, perfluorooctane, etc.), fluorine-modified aromatic hydrocarbon solvents (m-xylene hexafluoride, benzotrifluoride, etc.), Fluorine-modified ether solvents (such as methyl perfluorobutyl ether and perfluoro (2-butyltetrahydrofuran)), fluorine-modified alkylamine solvents (such as perfluorotributylamine and perfluorotripentylamine), and the like.
- fluorine-modified aliphatic hydrocarbon solvents perfluoroheptane, perfluorooctane, etc.
- fluorine-modified aromatic hydrocarbon solvents m-xylene hexafluoride, benzotrifluoride, etc.
- Fluorine-modified ether solvents such as methyl perfluor
- the vapor pressure (P2) at room temperature is very high, for example, about 10 3 Pa or more (preferably 0.8 ⁇ 10 3 Pa or more, atmospheric pressure (1.01325 ⁇ 10 5 Pa). ), More preferably about 6.0 ⁇ 10 3 Pa to 1.6 ⁇ 10 4 Pa), and a material having excellent volatility at room temperature may be selected.
- Fluorine solvents may be used alone or in combination of two or more. In the case of using a mixture of two or more, it is preferable to select the mixture so that the entire mixture enters the above-mentioned vapor pressure range.
- the film forming agent solution 21 used has a S1 concentration (solute concentration) of 0.01% by weight or more, preferably 0.03% by weight or more, more preferably 0.05% by weight or more. Good.
- S1 concentration concentrate concentration
- the film forming agent solution 21 having a solute concentration of 0.01% by weight or more it is easy to improve the durability level of the obtained thin film. If the solute concentration is too low, even if the film formation start pressure (described later) and the liquid discharge pressure are adjusted appropriately, an unwanted film forming agent solution 21 may drop from the discharge unit 19 before the film formation starts. May occur, and proper film formation may not be possible.
- the upper limit of the solute concentration is fixed inside the liquid supply pipe 25 or the discharge part 19 in consideration of the types of the solute S1 and the solvent S2 to be used, the inner diameter and length of the liquid supply pipe 25, the configuration of the discharge part 19, and the like. It can be determined as long as so-called liquid clogging does not occur.
- the solute concentration in the film forming agent solution 21 is, for example, 2% by weight or less, preferably 1% by weight or less, more preferably May be 0.1% by weight or less.
- solute concentration When the solute concentration is 2% by weight or less, film unevenness on the film formation surface of the film formation target (a plurality of substrates 100) is difficult to occur (excess material that does not become a film adheres). It is easy to realize cost reduction of thin film formation. If the solute concentration is too high, even if the film formation start pressure and the liquid discharge pressure are adjusted appropriately, the solute component is fixed inside the liquid supply pipe 25 and the discharge unit 19 and a so-called liquid clogging may occur. is there.
- the viscosity of the film forming agent solution 21 to be used is not particularly limited, and the solution 21 smoothly flows and discharges in the liquid supply tube 25 in consideration of the inner diameter and length of the liquid supply tube 25, the configuration of the discharge unit 19, and the like. Therefore, it may be appropriately adjusted to such an extent that the solution 21 can be appropriately discharged from the portion 19 and the solution 21 is fixed inside the liquid feeding tube 25 and the discharge portion 19 and does not cause so-called liquid clogging.
- the prepared film forming agent solution 21 is put into the storage container 23.
- a plurality of substrates 100 are held in the recesses of the substrate holder 31 outside the container 11.
- the individual substrates 100 that can be fixedly held on the substrate holder 31 include glass substrates, metal substrates, plastic substrates, and the like.
- non-heated film formation (a method in which the inside of the container 11 is not heated during film formation) may be selected.
- a plastic substrate can be applied in addition to a glass substrate or a metal substrate.
- a substrate whose shape is processed into for example, a plate shape or a lens shape can be used as each substrate 100.
- the substrate 100 may be wet-cleaned before being fixed to the substrate holder 31, or may be wet-cleaned after being fixed and before the start of film formation.
- the substrate holder 31 holding the plurality of substrates 100 is set inside the container 11 (in the case of batch processing).
- the opening / closing door (previous) provided below the side wall of the container 11 is opened, and the substrate holder 31 holding the substrate 100 is moved from the load lock chamber by operating the transport mechanism (roller 33). Can also be set.
- the pump 15 is actuated by a command from the controller 16 to start exhausting the vacuum vessel 11.
- the substrate holder 31 does not need to be kept stationary in the container 11 during film formation described later.
- the substrate holder 31 may move at a predetermined transport speed even during film formation. (Inline method). A higher transfer speed is more advantageous from the viewpoint of productivity.
- the controller 16 sequentially detects the pressure (Pc) in the container 11 based on the output from the pressure detection means 18.
- the pressure Pc in the container 11 is higher than the predetermined pressure most effective for improving the durability of the thin film to be formed, that is, the vapor pressure (P1) of S1 contained in the film forming agent solution 21 (P1).
- ⁇ Pc) and lower than the vapor pressure (P2) of S2 contained in the film forming agent solution 21 (Pc ⁇ P2) when it is determined that the pressure is within a specific range, control by the in-container pressure control function It is preferable to send an operation start command to the gas supply source 29 while maintaining this state.
- the gas supply source 29 Upon receiving the operation command, the gas supply source 29 sends the gas into the pipe 27 and pressurizes the liquid level of the storage container 23 with this gas. As a result, the film forming agent solution 21 is pumped through the liquid feed pipe 25, introduced into the nozzle 17, and then discharged from the discharge unit 19 into the container 11.
- the discharge shape is further stabilized, and wasteful consumption of liquid is further reduced, thereby further reducing the cost of thin film deposition and further improving production efficiency. It's easy to do.
- the gas may be sent into the pipe 27 so that the pressure of the liquid level of the storage container 23 becomes 0.05 to 0.3 MPa.
- the discharge time of the film forming agent solution 21 from the discharge unit 19 is not limited. This is because it varies depending on the size and number of the substrates 100.
- the thickness of the thin film formed on the substrate 100 is not limited. This is because it varies depending on the type of material included in the film forming agent solution 21 and the discharge time of the solution 21.
- the pressure Pc in the container 11 at the start of discharge (that is, film formation) is set to a predetermined range (P1).
- ⁇ And ⁇ p2) is preferably controlled when the pressure Pc in the container 11 at the start of discharge is equal to or lower than the vapor pressure P1 at the normal temperature of S1, the solute concentration of the film forming agent solution 21 to be used is appropriately Even if it is adjusted, the solute content may be fixed inside the liquid feeding pipe 25 or the discharge unit 19, and so-called liquid clogging may occur.
- the substrate 100 reaches the substrate 100 even if the solute concentration of the film forming agent solution 21 to be used is appropriately adjusted.
- the subsequent solvent S2 may remain without being volatilized due to a high atmospheric pressure, which may reduce the film density.
- the timing at which the controller 16 sends an operation start command to the gas supply source 29 is limited to when the pressure Pc in the container 11 is determined to be within the above range (P1 ⁇ Pc ⁇ P2). Not.
- the predetermined pressure most effective for improving the durability of the formed thin film is the above range (P1 ⁇ Pc ⁇ P2).
- the film When the film is formed under a pressure that is too low (for example, one or more orders of magnitude lower than P1) compared to the vapor pressure P1 of the solute S1 at room temperature, the film is deposited on the substrate 100 to form a thin film. As a result, the solute content may evaporate, and as a result, the solute content may not adhere precisely and uniformly on all the substrates 100. When there is a non-existing portion of the thin film, film peeling at the time of friction occurs starting from this portion, and as a result, improvement in durability of the film cannot be expected.
- a pressure that is too low for example, one or more orders of magnitude lower than P1
- the film is formed under a pressure that is too high (for example, a pressure that is higher by one digit or more than P2) compared to the vapor pressure P2 of the solvent S2 at room temperature, The remaining solvent is removed, but no film is formed on that portion (the solute is not uniformly deposited, resulting in a film defect).
- a pressure that is higher by one digit or more than P2 for example, a pressure that is higher by one digit or more than P2
- examples of the thin film formed in this example include an antifouling film, a waterproof film, a moisture proof film, an organic EL film, and a titanium oxide film.
- the present invention is a film forming technique applicable to all compounds including organic materials, inorganic materials, organic-inorganic hybrid materials, and the like.
- the thin film formed in this example is an antifouling film (an example of an organic-inorganic hybrid film)
- the antifouling film is a film having water repellency and oil repellency, and has a function of preventing adhesion of oil stains.
- the antifouling film maintains oil repellency.
- the antifouling film can wipe off ink with an oil-based pen even when steel wool # 0000 with a load of 1 kg / cm 2 is reciprocated more than 2000 times (preferably 4000 times, more preferably 6000 times). So that its durability level is the most improved.
- the durability is most improved when the film forming agent solution 21 is discharged from the discharge portion 19 located at a distance D with respect to the substrate 100, and the pressure Pc in the container 11 at the start of the discharge. Is adjusted to a predetermined pressure (P1 ⁇ Pc ⁇ P2) that is most effective for improving the durability of the formed thin film, thereby reliably filling the surface of the substrate 100 with constituent molecules (thin film molecules) of the solute, This is because the non-existing portion of the thin film is not allowed to exist.
- the pressure Pc in the container 11 when discharging the film forming agent solution 21 is not P1 ⁇ Pc ⁇ P2, but is P1 or less ( ⁇ P1) or P2 or more (P2 ⁇ ), it is satisfactory. It is possible to form a film, and the thin film obtained can be of a level that is recognized as having practical durability.
- the film forming agent solution 21 adjusted in the above is used, and this is preferably discharged onto the substrate 100 under a specific pressure Pc that is higher than the vapor pressure P1 of S1 and lower than the vapor pressure P2 of S2.
- the film forming agent solution 21 discharged from the discharge unit 19 reaches the substrate 100 while maintaining the solution state, and the pressure Pc in the container 11 is appropriately controlled.
- the solvent component evaporates to form a film (thin film), and the density is increased.
- a thin film having the highest level of durability can be formed on each substrate 100 at a low cost.
- the thin film formed by the method of this example is an antifouling film
- oil such as fingerprints attached to the surface was wiped off with a heavy load (for example, a load of about 1 kg / cm 2 ).
- a heavy load for example, a load of about 1 kg / cm 2 .
- the constituent components of the antifouling film can be effectively left.
- the thin film formed by the method of this example is not limited to the antifouling film.
- the refractive index in light with a wavelength of 550 nm is 2.400.
- a titanium oxide film having good optical characteristics is formed.
- Pc By setting Pc to 1000 Pa, it is higher than the vapor pressure of titanium oxide at room temperature (no measurement data, extrapolated value is predicted to be 10 ⁇ 10 Pa or less), and the vapor pressure of water at room temperature is about 3000 Pa. As a result, it is considered that a dense inorganic titanium oxide film was formed and good optical properties were obtained.
- the film forming apparatus of the present invention is not limited to the above-described form of the film forming apparatus 1 (the discharge direction of the film forming agent solution 21 is downward), and the installation direction of the nozzle 17 may be disposed sideways (film forming agent).
- the discharge direction of the solution 21 is horizontal).
- one end of the nozzle 17 may be inserted horizontally from the inside of the vacuum vessel 11 and the other end of the nozzle 17 may be exposed outside the side wall of the vessel 11.
- a rotation member (not shown) that allows the portion (including the discharge unit 19) to be rotated about ⁇ 90 degrees, for example, is attached.
- the substrate holder 31 is corresponding to the discharge unit 19 connected to one end of the nozzle 17 in correspondence with the substrate holder 31. It is arranged inside the vacuum vessel 11.
- the substrate holder 31 may be configured to be movable, or alternatively, the nozzle 17 may be configured to be movable by a transport mechanism (not shown). In this case, this film forming method can be applied even when the nozzle 17 moves.
- the film forming agent solutions a to d having the configuration shown in Table 1 were prepared.
- oil repellent 1 is a surface antifouling coating agent (manufactured by Daikin Industries, trade name: OPTOOL DSX, component name: fluorine-containing organosilicon compound), and “oil repellent 2” is a fluorine antifouling coating.
- Agent Shin-Etsu Chemical Co., Ltd., trade name: KV-178, component name: fluorinated organosilicon compound
- Solvent 1 is a fluorinated solvent (Sumitomo 3M, trade name: Novec7200)
- Solvent 2 is A fluorine-based solvent (trade name: Novec7300, manufactured by Sumitomo 3M Limited).
- Table 2 shows other film formation conditions such as the pressure Pc and the distance D in the container 11 at the start of film formation. Note that a spray nozzle capable of discharging 140 to 260 ⁇ m-sized solution-like particles was used as the nozzle discharge portion, and the discharge time of the film forming agent solution was uniformly set to 30 seconds. Then, each experimental example sample in which an antifouling film having a thickness of 10 to 15 nm was formed on the substrate 100 was obtained. In Experimental Examples 1 to 3, an antifouling film was formed in a state where the substrate holder 31 on which the substrate 100 was set was stationary in the vacuum vessel 11 (batch processing). In Experimental Examples 4 to 6, a film was formed while the substrate holder 31 on which the substrate 100 was set was conveyed in the vacuum vessel 11 (continuous processing).
- Evaluation> 2-1 Durability of antifouling film 1 cm 2 of steel wool (SW), # 0000 was placed on the surface of the antifouling film of each experimental sample obtained, and a 50 mm straight line was applied under a load of 1 kg / cm 2. The top was reciprocated (rubbed) at a speed of 1 reciprocation 1 second. After performing this reciprocation operation 3500 times, the contact angle of pure water on the antifouling film surface was measured. In addition, the contact angle of pure water on the antifouling film surface was measured immediately after film formation. The value of the contact angle was an average value of the measured values obtained by repeating the dropping and measurement five times for the measured value of the contact angle one minute after dropping pure water. The results are shown in Table 2.
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Abstract
Description
第1発明でも同様で、溶液の吐出方向は下向き、横向きのいずれでもよい。
1…成膜装置、11…真空容器、13…配管、15…真空ポンプ(排気手段)、16…コントローラ、17…ノズル、18…圧力検出手段、19…吐出部、21…成膜剤溶液、23…貯蔵容器、25…送液管、26…バルブ、27…配管、29…ガス供給源、31…基板ホルダ、33…ローラ(搬送機構)、100…基板。
<成膜装置の構成例>
まず、本発明の成膜装置(本発明装置)の一例(溶液の吐出方向が下向きの場合)を説明する。
図1に示すように、本発明装置の一例としての成膜装置1は、成膜対象としての基板100が内部に配置される真空容器11を含む。真空容器11は、本例では略直方体状の中空体で構成してあるが、本発明ではこの形状に限定されない。
ガス供給源29は、コントローラ16からの指令により作動し、貯蔵容器23の液面が加圧されるように、配管27内へガスを供給する。これにより貯蔵容器23の液面が加圧され、本例では成膜剤溶液21は送液管25内に圧送される。なお、本発明では、こうした加圧により溶液21を送り出す態様には限定されない。
成膜剤溶液21の吐出方向が下向きの本例では、基板100までの距離Dが150mm以上となるように吐出部19を配置することで、成膜剤溶液21の十分な有効吐出域が確保され、成膜剤溶液21の無駄な消費の抑制に寄与し、その結果、成膜の低コスト化に一層寄与しうる。
次に、成膜装置1を用いた、本発明の成膜方法(本発明方法)の一例を説明する。
なお、溶質には粉末などの固体のほか、液体も含まれる。溶液21が液体と液体の混合系で構成される場合、溶液21中の存在量または割合の多い成分が溶媒であり、本例ではS2を構成する。
基板ホルダ31に固定保持させることが可能な個々の基板100として、ガラス基板や金属基板の他、プラスチック基板などが挙げられる。基板100の種類によっては、無加熱成膜(成膜時に容器11内を加熱しない方式)が選択されることもある。無加熱成膜を選択する場合、ガラス基板や金属基板の他、プラスチック基板を適用することも可能である。また個々の基板100として、形状が例えば板状やレンズ状などに加工されたものを用いることができる。なお、基板100は、基板ホルダ31に固定前に湿式洗浄してもよく、あるいは固定後かつ成膜開始前に湿式洗浄してもよい。
なお、基板ホルダ31は、後述の成膜中に、容器11内で静止させておく必要はなく、連続処理の場合、成膜中でも容器11内を所定の搬送速度で移動していることもある(インライン方式)。搬送速度は、生産性の観点からは速い方が有利である。しかしながら、成膜剤(薄膜の成膜原料。本例のS1に相当)の有効利用、膜性能の観点等からは、例えば50~90mm/秒程度とするのがよい。
したがって、本発明において、コントローラ16がガス供給源29へ作動開始の指令を送出するタイミングは、容器11内の圧力Pcが上記範囲(P1<Pc<P2)になったことを判定したときに限定されない。形成される薄膜の耐久性向上に最も効果的な所定圧力が上記範囲(P1<Pc<P2)ということである。
防汚膜は、撥水性、撥油性を有する膜であり、油汚れの付着を防止する機能を有する。ここで、「油汚れの付着を防止する」とは、単に油汚れが付着しないだけでなく、たとえ付着しても簡単に拭き取れることを意味する。すなわち、防汚膜は撥油性を維持する。具体的に、防汚膜は、1kg/cm2の荷重によるスチールウール#0000を、2000回(好ましくは4000回、より好ましくは6000回)を超えて往復させても油性ペンによるインクを拭き取れるように、その耐久性のレベルが最も向上している。
なお上述したが、成膜剤溶液21を吐出させるときの容器11内の圧力Pcが、P1<Pc<P2ではなく、P1以下(≦P1)やP2以上(P2≦)の場合でも、良好な成膜を行うことは可能であり、得られる薄膜を、実用上、耐久性を備えていると認められるレベルのものとすることができる。
本発明の成膜装置は、上述した成膜装置1の形態(成膜剤溶液21の吐出方向が下向き)に限定されず、ノズル17の設置向きを横向きに配置してもよい(成膜剤溶液21の吐出方向が横向き)。横向きとする場合、例えば、真空容器11の内部側方から水平方向にノズル17の一端を挿入し、ノズル17の他端を容器11の側壁外部に露出させてもよい。あるいは、ノズル17の長手方向半ば付近に、それより先の部分(吐出部19を含む)が例えば±90度程度、回動可能となる回動部材(図示省略)を取り付けた上で、該ノズル17の一端(ここには吐出部19が接続される)を真空容器11の内部上方から下向きに挿入し、ノズル17の他端を容器11外部に露出させて配置することもできる。いずれにしてもノズル17の設置向きを横向きとする場合、それに対応させて、基板ホルダ31は、その基板100を保持する面がノズル17の一端に接続される吐出部19と対向するように、真空容器11の内部側方に配置される。
<1.防汚膜サンプルの作製>
図1に示す成膜装置1を用い、基板ホルダ31の基板保持面に、基板100(ガラス基板、サイズ:50mm×100mm)を2枚、セットした。
なお、実験例1~3では、基板100をセットした基板ホルダ31を真空容器11内に静止させた状態で防汚膜を成膜した(バッチ処理)。実験例4~6では、基板100をセットした基板ホルダ31を真空容器11内で搬送させながら成膜した(連続処理)。
2-1.防汚膜の耐久性
得られた各実験例サンプルの防汚膜の表面に、1cm2のスチールウール(SW)、#0000を載せ、1kg/cm2の荷重をかけた状態で、50mmの直線上を1往復1秒の速さで往復(摩擦)させた。この往復操作を3500回行った後、防汚膜面の純水の接触角を測定した。併せて成膜直後にも防汚膜面の純水の接触角を測定した。接触角の値は、純水滴下1分後の接触角の測定値について、滴下と測定を5回繰り返して得られた測定値の平均値とした。結果を表2に示す。
得られた各実験例サンプルの防汚膜の表面に、1cm2のスチールウール(SW)、#0000を載せ、1kg/cm2の荷重をかけた状態で、50mmの直線上を1往復1秒の速さで往復(摩擦)させた。この往復操作100回毎に、試験面(防汚膜面)に、油性マジックペン(有機溶媒型マーカー、商品名:マッキー極細、セブラ社製)で線を描き、油性マジックペンの有機溶媒型インクを乾燥布で拭き取れるか否かを評価した。その結果、有機溶媒型インクを拭き取ることができた最大擦傷往復回数を表2に示す。
3-1.バッチ処理の場合(実験例1~3)
表1及び表2示すように、成膜剤溶液を吐出するときの圧力Pcが、S1の蒸気圧P1よりも高く、S2の蒸気圧P2よりも低かった実験例1,2(低真空での吐出)は、成膜直後の防汚膜表面の接触角がSW摩擦後にもほとんど低下が見られず、耐久性が極めて優れていた。また最大擦傷往復回数も3500回以上と十分であり、実用に耐えうる耐摩耗性を備えていることが確認された。
これに対し、PcがP2よりも高すぎた実験例3(大気圧での噴霧)は、成膜直後の防汚膜表面の接触角がSW摩擦後に大きく低下した。また最大擦傷往復回数も極めて少なく、耐久性を備えていないことが確認された。
基板の搬送速度が速くなると、防汚膜の耐久性が低下し、また最大擦傷往復回数が少なくなる傾向にあることが確認された。膜性能と生産性のバランスがよいのは実験例5であった。
Claims (7)
- 真空中で基板上に薄膜を形成する成膜方法において、2種類以上の材料を含む溶液を、該溶液を構成する各材料の蒸気圧に基づいて設定される圧力の雰囲気下で、基板に吐出することを特徴とする成膜方法。
- 前記溶液を構成する各材料が、第1材料(S1)と、該S1の蒸気圧(P1)よりも高い蒸気圧(P2)を持つ第2材料(S2)を含んでいるとき、P1よりも高く、かつP2よりも低い圧力の雰囲気下で、前記溶液を吐出する、請求項1に記載の成膜方法。
- 前記溶液を構成する各材料が、第1材料(S1)と、該S1の蒸気圧(P1)よりも高い蒸気圧(P2)を持つ第2材料(S2)を含んでいるとき、P2以上の圧力の雰囲気下で、前記溶液を吐出する、請求項1に記載の成膜方法。
- 前記溶液を構成する各材料が、第1材料(S1)と、該S1の蒸気圧(P1)よりも高い蒸気圧(P2)を持つ第2材料(S2)を含んでいるとき、P1以下の圧力の雰囲気下で、前記溶液を吐出する、請求項1に記載の成膜方法。
- 搬送機構を持つインライン方式で成膜する、請求項1~4のいずれかに記載の成膜方法。
- 真空中で基板上に薄膜を形成するために用いる成膜装置において、
成膜対象としての基板が内部に配置される真空容器と、
真空容器内を排気する排気手段と、
2種類以上の材料を含む溶液を貯蔵する貯蔵容器と、
前記基板に前記溶液を吐出するノズルとを含み、
前記真空容器内の圧力が、前記溶液を構成する各材料の蒸気圧に基づいて設定される圧力になったとき、前記溶液をノズルから基板に吐出するように構成したことを特徴とする成膜装置。 - 基板を搬送させる搬送機構を備えたインライン方式である、請求項6に記載の成膜装置。
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US15/102,471 US10569291B2 (en) | 2014-05-23 | 2014-05-23 | Film formation method and film formation apparatus for thin film |
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US15/102,850 US20170100736A1 (en) | 2014-05-23 | 2015-04-24 | Film formation method and film formation apparatus for thin film |
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JP2004087465A (ja) * | 2002-06-19 | 2004-03-18 | Semiconductor Energy Lab Co Ltd | 発光装置の作製方法 |
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JPH06293519A (ja) | 1992-07-28 | 1994-10-21 | Ishihara Sangyo Kaisha Ltd | 酸化チタンの粒子と膜の製造方法 |
JPH09309745A (ja) | 1996-05-24 | 1997-12-02 | Central Glass Co Ltd | 撥水撥油性物品及びその製法 |
JP3681514B2 (ja) * | 1996-07-29 | 2005-08-10 | 株式会社リコー | 電子写真用キャリア及びその製造方法 |
JP2000008168A (ja) * | 1998-06-19 | 2000-01-11 | Shincron:Kk | 薄膜形成方法 |
US6678082B2 (en) * | 2001-09-12 | 2004-01-13 | Harris Corporation | Electro-optical component including a fluorinated poly(phenylene ether ketone) protective coating and related methods |
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WO2005093120A1 (ja) * | 2004-03-29 | 2005-10-06 | Tokyo Electron Limited | 成膜装置および成膜方法 |
JP2007253043A (ja) * | 2006-03-22 | 2007-10-04 | Toshiba Corp | 液滴噴射装置及び塗布体の製造方法 |
JP2009019117A (ja) * | 2007-07-12 | 2009-01-29 | Seiko Epson Corp | カラーフィルター用インク、カラーフィルター、カラーフィルターの製造方法、画像表示装置、および、電子機器 |
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WO2011158453A1 (ja) * | 2010-06-16 | 2011-12-22 | パナソニック株式会社 | 薄膜の製造方法 |
WO2014114974A1 (en) * | 2013-01-22 | 2014-07-31 | Essilor International (Compagnie Générale d'Optique) | Machine for coating an optical article with a predetermined coating composition and method for using the machine |
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2015
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- 2015-04-24 JP JP2015540942A patent/JP6288724B2/ja active Active
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JP2001252600A (ja) * | 2000-03-10 | 2001-09-18 | Kokusai Kiban Zairyo Kenkyusho:Kk | 薄膜製造装置及び薄膜の製造方法 |
JP2003257631A (ja) * | 2002-02-28 | 2003-09-12 | Sanyo Electric Co Ltd | 有機el素子の形成方法 |
JP2004087465A (ja) * | 2002-06-19 | 2004-03-18 | Semiconductor Energy Lab Co Ltd | 発光装置の作製方法 |
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HK1215694A1 (zh) | 2016-09-09 |
HK1215695A1 (zh) | 2016-09-09 |
JPWO2015177916A1 (ja) | 2017-04-20 |
JPWO2015178193A1 (ja) | 2017-04-20 |
CN105377451A (zh) | 2016-03-02 |
JPWO2015178167A1 (ja) | 2017-04-20 |
CN105307784B (zh) | 2018-01-16 |
TW201604310A (zh) | 2016-02-01 |
CN105307783B (zh) | 2018-11-16 |
US20170100736A1 (en) | 2017-04-13 |
JP5911160B1 (ja) | 2016-04-27 |
JP6288724B2 (ja) | 2018-03-07 |
US10569291B2 (en) | 2020-02-25 |
US20170072418A1 (en) | 2017-03-16 |
TW201545813A (zh) | 2015-12-16 |
WO2015178193A1 (ja) | 2015-11-26 |
CN105307784A (zh) | 2016-02-03 |
WO2015178167A1 (ja) | 2015-11-26 |
TWI599675B (zh) | 2017-09-21 |
US20170066001A1 (en) | 2017-03-09 |
CN105377451B (zh) | 2018-03-06 |
TWI574732B (zh) | 2017-03-21 |
HK1215693A1 (zh) | 2016-09-09 |
CN105307783A (zh) | 2016-02-03 |
JP6021210B2 (ja) | 2016-11-09 |
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