WO2018220756A1 - ミスト塗布成膜装置の塗布ヘッドおよびそのメンテナンス方法 - Google Patents
ミスト塗布成膜装置の塗布ヘッドおよびそのメンテナンス方法 Download PDFInfo
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- WO2018220756A1 WO2018220756A1 PCT/JP2017/020298 JP2017020298W WO2018220756A1 WO 2018220756 A1 WO2018220756 A1 WO 2018220756A1 JP 2017020298 W JP2017020298 W JP 2017020298W WO 2018220756 A1 WO2018220756 A1 WO 2018220756A1
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- mist
- plate
- raw material
- bottom plate
- slit
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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
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
- B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
- B05B1/044—Slits, i.e. narrow openings defined by two straight and parallel lips; Elongated outlets for producing very wide discharges, e.g. fluid curtains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
- B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
-
- 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
- B05B14/30—Arrangements for collecting, re-using or eliminating excess spraying material comprising enclosures close to, or in contact with, the object to be sprayed and surrounding or confining the discharged spray or jet but not the object to be sprayed
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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
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
- B05B15/555—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids discharged by cleaning nozzles
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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
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
- B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
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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
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/28—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with integral means for shielding the discharged liquid or other fluent material, e.g. to limit area of spray; with integral means for catching drips or collecting surplus liquid or other fluent material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Definitions
- Embodiments of the present invention relate to a coating head of a mist coating film forming apparatus and a maintenance method thereof.
- the mist coating film forming apparatus includes a coating liquid atomizing mechanism, a mist coating mechanism, and a baking / drying mechanism.
- the coating liquid atomizing mechanism atomizes a coating liquid containing a predetermined raw material in an atomizing container using an ultrasonic vibrator to obtain a droplet-shaped coating liquid mist.
- the mist application mechanism has a placement unit for placing a substrate to be deposited.
- the mist coating mechanism supplies the substrate with the coating liquid mist generated by the coating liquid atomizing mechanism, and coats the coating liquid mist on the surface of the substrate.
- the coating liquid mist applied on the surface of the substrate is fired / dried to form a thin film containing a predetermined raw material on the surface of the substrate.
- Such a mist coating film forming apparatus can uniformly form a thin film having a film thickness of 1 ⁇ m or less.
- a spray coater (see, for example, Patent Document 1), a spin coater, and the like as a coating device that performs the coating liquid in droplets.
- a spin coater forms a thin film on the surface of a substrate by rotating a droplet of a coating solution supplied to the center of the surface of the substrate at a high speed.
- the spray coating apparatus sprays a coating liquid onto a substrate with high-pressure air gas to form a thin film on the substrate surface.
- a mist coating film forming apparatus forms a thin and uniform thin film by rectifying the mist in a coating head and coating it on the surface of the substrate.
- the mist coating film forming apparatus rectifies the mist in the coating head, the raw material solution stays in the coating head. If the raw material solution is discarded as it is, the yield is substantially reduced and the cost is increased.
- the coating head when a different thin film is formed by changing the raw material solution, it is necessary to remove the staying raw material solution. For this purpose, the coating head must be disassembled and cleaned, increasing the number of work steps and reducing the throughput of thin film production.
- an object is to provide a coating head of a mist coating film forming apparatus with improved yield and throughput, and a maintenance method thereof.
- a coating head of a mist coating film forming apparatus provided with a main body.
- the main body is provided with a top plate provided with a supply port capable of supplying either a mist of a raw material solution or a cleaning liquid, a bottom plate provided below the top plate in the vertical direction, and the top plate And a sidewall that is provided between the bottom plate and is connected to the top plate and the bottom plate at an upper end and a lower end, respectively, and forms an internal space together with the top plate and the bottom plate.
- the sidewall includes a slit that sprays the mist from the internal space to the outside, and a recovery port that enables the mist aggregated in the internal space or the supplied cleaning liquid to be recovered.
- the bottom plate has an inclination that decreases in height from the inner periphery of the sidewall toward the recovery port.
- the bottom plate since the bottom plate has a slope that decreases in height from the inner periphery of the sidewall toward the recovery port, the retained raw material solution or cleaning liquid can be easily recovered. it can. Therefore, the yield and throughput can be improved in the coating head of the embodiment.
- FIG. 4A is a plan view
- FIG. 4B is a front view
- FIG. 4C is a side view.
- 5A is a plan view
- FIG. 5B is a front view
- FIG. 5C is a side view.
- FIG. 6A is a plan view
- FIG. 6B is a front view
- FIG. 6C is a side view.
- FIG. 1 is a schematic explanatory view illustrating a mist coating film forming apparatus according to this embodiment.
- a mist coating film forming apparatus 100 according to the present embodiment includes a raw material solution mist forming mechanism 50, a mist coating mechanism 70, and a baking / drying mechanism 90 as main components.
- the raw material solution mist generating mechanism 50 executes a raw material solution mist generation process.
- the raw material solution mist 6 is generated by misting (atomization).
- the raw material solution 5 put in the mist container 4 has a center particle size of about 4 ⁇ m and a particle size distribution (standard deviation ⁇ is ⁇ 20% or less). Can be misted into narrow droplets.
- the raw material solution mist 6 is conveyed to the mist coating mechanism 70 via the mist supply line 22 by the carrier gas supplied from the carrier gas supply unit 16.
- the ultrasonic vibrator 1 oscillates at a frequency set within a range of 1.5 to 2.5 MHz, for example.
- Water 3 is introduced into a water tank 2 provided on the ultrasonic vibrator 1 as an ultrasonic propagation medium.
- the raw material solution 5 put into the mist container 4 is misted (atomized).
- the low viscosity raw material solution is diluted with a solvent such as acetone, methyl ethyl ketone, methylene chloride, methanol, toluene, water, hexane, methyl acetate, ethyl acetate, vinyl acetate, or ethyl chloride.
- a solvent such as acetone, methyl ethyl ketone, methylene chloride, methanol, toluene, water, hexane, methyl acetate, ethyl acetate, vinyl acetate, or ethyl chloride.
- the raw material solution 5 is a nanoparticle dispersion solution.
- silver nanoparticle dispersion solution, zirconium oxide dispersion solution, cerium oxide dispersion solution, indium oxide dispersion solution, tin oxide dispersion solution, zinc oxide dispersion solution, titanium oxide dispersion solution, silica dispersion solution or alumina dispersion solution can be considered. These solutions are diluted with the above solvent to obtain the raw material solution 5.
- the raw material solution 5 is a nanofiber dispersion solution.
- a carbon nanotube dispersion solution, a silver nanofiber dispersion solution, or a cellulose nanofiber dispersion solution can be considered, and these solutions are diluted with the above solvent to obtain the raw material solution 5.
- the carrier gas supplied from the carrier gas supply unit 16 is supplied from the carrier gas introduction line 21 into the mist container 4. Thereby, the droplet-form raw material solution mist 6 misted in the internal space of the mist container 4 is conveyed toward the coating head 8 of the mist coating mechanism 70 via the mist supply line 22.
- Nitrogen gas or air is mainly used as the carrier gas, and the raw material solution mist 6 is conveyed.
- the carrier gas flow rate is controlled to 2 to 10 (L / min) by the mist control unit 35.
- the valve 21b is a valve for adjusting the carrier gas flow rate.
- the valve 21 b is provided in the carrier gas introduction line 21.
- the mist control unit 35 controls the flow rate of the carrier gas supplied from the carrier gas supply unit 16 by controlling the degree of opening and closing of the valve 21b.
- the mist control unit 35 controls the opening and closing of the ultrasonic oscillation circuit of the ultrasonic transducer 1 and the opening and closing of the ultrasonic oscillation circuit for the ultrasonic transducers having different frequencies, along with the control of the carrier gas flow rate.
- the mist application mechanism 70 executes a raw material solution mist application process (mist-coating process).
- the raw material solution mist 6 supplied via the mist supply line 22 is coated on the surface of a substrate 9 (film formation target substrate) to form a raw material solution liquid film.
- the raw material solution mist 6 is supplied from the coating head 8 onto the surface of the substrate 9 (film formation target substrate) placed on the moving stage 10 (mounting unit).
- the firing / drying mechanism 90 executes a firing / drying process.
- the baking / drying process is a process for forming a thin film on the surface of the substrate 9 using a raw material contained in the raw material solution liquid film as a constituent material.
- the substrate 9 having the raw material solution liquid film formed on the surface is baked and dried on the hot plate 13 to evaporate the solvent of the raw material solution liquid film.
- the firing / drying mechanism 90 has a hot plate 13 provided in the firing / drying chamber 14 as a main component.
- the substrate 9 having the raw material solution liquid film formed on the surface is placed on the hot plate 13 in the baking / drying chamber 14.
- the substrate 9 on which the raw material solution liquid film is formed is baked and dried.
- the raw material (predetermined raw material) itself contained in the raw material solution 5 is formed on the surface of the substrate 9 as a constituent material.
- a thin film can be formed.
- generated by baking / drying process is discharge
- the exhaust gas output line 24 is opened and closed by a valve 24b.
- the firing / drying process is performed using the hot plate 13, but the firing / drying mechanism 90 is configured so as to supply hot air into the firing / drying chamber 14 without using the hot plate 13. May be configured.
- FIG. 2 is a perspective view illustrating the coating head of this embodiment.
- FIG. 3 is a cross-sectional view taken along line AA in FIG.
- FIG. 4A to FIG. 6C are three-side views illustrating a part of the coating head of this embodiment.
- FIG. 7 is a partially exploded view illustrating the coating head of this embodiment.
- the coating head 8 includes a main body 80, a slit block 83, and a slit plate 84.
- the slit block 83 is connected to the lower side of the main body 80.
- the slit plate 84 is connected at one end along the inclination of the slit block 83, and the remaining portion forms the bottom surface 8 b of the coating head 8.
- a slit-like mist outlet 18 is provided on the bottom surface 8 b of the coating head 8.
- a mist of the raw material solution is ejected from the mist ejection port 18.
- the main body 80 is provided with a main body slit 85a.
- a groove is provided on the inclined surface of the slit block 83, and a main body slit 85a is connected to one end of the groove.
- the other end of the groove is a mist outlet 18.
- the upper part of the groove is covered with a part of the slit plate 84.
- the groove covered with the slit block 83 and the slit plate 84 forms a mist guide path 83a supplied from the main body slit 85a.
- the mist supplied from the main body slit 85a is ejected from the mist ejection port 18 through the guide path 83a.
- the guide path 83 a has an angle according to the inclination of the slit block 83. Therefore, the mist supplied from the guide path 83a is ejected from the mist ejection port 18 at an angle ⁇ 1 from the vertical direction.
- the substrate 9 is placed so that the surface thereof faces the bottom surface 8 b of the coating head 8. That is, the substrate 9 is placed under the bottom surface 8 b of the coating head 8.
- the mist outlet 18 is provided on the bottom surface 8b of the head.
- the mist outlet 18 is provided in a slit shape with the direction of the short side of the substrate 9 as the longitudinal direction.
- the formation length of the mist ejection port 18 is set to be approximately the same as the short side width of the substrate 9.
- the three-dimensional coordinates include an X axis parallel to the direction in which the slit of the mist outlet 18 extends, a Y axis parallel to the direction in which the moving stage 10 moves, and a Z axis that is the vertical direction.
- the raw material solution mist 6 rectified in the coating head 8 while moving the substrate 9 along the Y-axis direction (a direction orthogonal to both the extending direction and the vertical direction of the mist outlet 18) by the moving stage 10. Is supplied from the mist outlet 18.
- the raw material solution mist 6 can be applied to almost the entire surface of the substrate 9 to form a liquid film of the raw material solution on the surface of the substrate 9.
- the mist outlet 18 is formed in a slit shape. Therefore, by adjusting the formation length of the coating head 8 in the longitudinal direction (X-axis direction, first direction), the short side width is not limited to the short side width of the substrate 9 that is a thin film forming substrate. It can be applied to a wide substrate 9. Specifically, the formation length of the mist ejection port 18 is substantially matched with the maximum short side width of the substrate 9 by allowing the coating head 8 to have a width in the longitudinal direction that matches the assumed maximum short side width of the substrate 9. be able to.
- the moving stage 10 has a substrate 9 placed on top of it.
- the moving stage 10 moves under the control of the movement control unit 37 while being separated from the bottom surface 8b of the coating head 8 by about 2 to 5 mm.
- the moving stage 10 moves in the reverse direction (negative direction) of the positive direction of the Y axis.
- the thickness of the raw material solution liquid film can be adjusted by changing the moving speed of the moving stage 10 by the movement control unit (FIG. 1) 37.
- the movement control unit 37 moves the moving stage 10 along the moving direction (the negative direction of the Y axis in FIG. 2) that matches the short direction of the mist ejection port 18 of the coating head 8, and moves along the moving direction.
- the moving speed of the moving stage 10 is variably controlled.
- the coating head 8 and the moving stage 10 are provided in the mist coating chamber 11.
- the mixed gas of the solvent vapor and the carrier gas of the raw material solution mist 6 volatilized in the mist coating chamber 11 is discharged to the atmosphere after being processed by an exhaust processing device (not shown) through the exhaust gas output line 23.
- the valve 23b is a valve provided in the exhaust gas output line 23.
- the main body 80 has a substantially rectangular parallelepiped shape as in this example, for example.
- the main body 80 includes a top plate 87, a bottom plate 82, and sidewalls 88.
- the top plate 87 is provided on the upper part of the main body 80.
- the top plate 87 is a square plate.
- the bottom plate 82 is provided at the bottom of the main body 80.
- the bottom plate 82 is a rectangular member having substantially the same shape as the top plate 87 in the XY plan view.
- the sidewall 88 is a frame-like body having a rectangular shape that is substantially the same as the top plate 87 and the bottom plate 82 in the XY sectional view.
- the sidewall 88 is provided between the top plate 87 and the bottom plate 82.
- the sidewall 88 is connected to the top plate 87 at the upper end and is connected to the bottom plate 82 at the lower end.
- the main body 80 has a cavity surrounded by the top plate 87, the sidewall 88 and the bottom plate 82.
- a cavity inside the main body 80 is a rectifying chamber 80a.
- the top plate 87 has an opening. Pipes for the mist supply line 22 and the cleaning liquid / substitution gas supply line 25 are fluidly connected to the opening. Mist, cleaning liquid and replacement gas are supplied through this opening. This opening is a supply port 87a.
- the sidewall 88 includes a front plate 86 and a back plate 85.
- the front plate 86 and the back plate 85 are arranged parallel to the XZ plane and facing each other.
- the front plate 86 and the back plate 85 are plate-like bodies that constitute the sidewall 88.
- An opening is provided below the front plate 86.
- a pipe for the raw material solution recovery line 26 is fluidly connected to the opening. This opening is a recovery port 86a.
- the collection port 86a is located on the upper surface of the bottom plate 82 or higher than the upper surface.
- the back plate 85 has a main body slit 85a.
- the main body slit 85a has a longitudinal direction substantially parallel to the X axis.
- the main body slit 85 a is provided at a position higher than the upper surface of the bottom plate 82.
- the coating head 8 since the bottom plate 82 has an inclined portion whose height decreases from the main body slit 85a toward the slit recovery port, the coating head 8 has almost no relation to the retention of the raw material solution in the bottom plate 82. In addition, mist can be ejected. Therefore, it is not necessary to frequently collect the raw material solution from the coating head 8 or to clean the coating solution 8, so that the thin film manufacturing throughput can be improved. In addition, since the accumulated raw material solution can be reused, a sufficient amount of the raw material solution can be collected in the bottom plate 82, which can contribute to the improvement of the yield.
- the rectifying chamber 80a which is the internal space of the main body 80, is partitioned by one or more current plates.
- four current plates 81-1 to 81-4 are provided.
- the current plates 81-1 to 81-4 are provided in this order from the bottom to the top.
- Each of the current plates 81-1 to 81-4 is a rectangular plate, and three sides are connected to the inner wall of the main body 80. The remaining sides are opened as end portions 81-1a to 81-4a. That is, the rectifying chamber 80a is partially partitioned by the current plates 81-1 to 81-4, and the space in the rectifying chamber 80a is fluidly continuous.
- the current plates 81-1 to 81-4 are provided such that the end portions 81-1a to 81-4a are below the other portions in the vertical direction.
- the lowermost current plate 81-1 is provided such that its end portion 81-1a faces in the direction opposite to the direction in which the main body slit 85a is provided.
- the direction in which the end portion 81-1a extends is a direction parallel to the main body slit 85a.
- the current plate 81-2 is provided adjacent to and above the current plate 81-1. A plate surface of the current plate 81-1 is disposed vertically below the end 81-2a. The current plate 81-2 is provided so that the end portion 81-2a faces the direction in which the main body slit 85a is provided.
- the current plate 81-3 is provided adjacent to and above the current plate 81-2.
- the plate surface of the current plate 81-2 is arranged vertically below the end 81-3a.
- the current plate 81-3 is provided such that its end 81-3a faces in a direction opposite to the direction in which the main body slit 85a is provided.
- the current plate 81-4 is provided adjacent to and above the current plate 81-3.
- a plate surface of the current plate 81-3 is disposed vertically below the end 81-4a.
- the current plate 81-4 is provided so that the end portion 81-4a faces the direction in which the main body slit 85a is provided.
- the distance in the vertical direction between the end portion of the current plate and the current plate disposed below and adjacent to the current plate is set to about 1 mm to several mm. For example, this distance is appropriately set depending on the raw material solution to be misted.
- each of the current plates 81-1 to 81-4 is provided obliquely at an angle ⁇ 2 from the vertical direction.
- the angle ⁇ 2 is appropriately set so as to flow down to the bottom plate 82 together with the cleaning liquid or the like when the cleaning liquid or the replacement gas is introduced.
- the angle ⁇ 2 is set to about 60 °, for example.
- the mist supplied from the supply port 87a is blocked in the two-dimensional direction in which the current plate 81-4 spreads while the hand going to the plate surface of the current plate 81-4 is blocked, and dispersed in the direction in which the end 81-4a extends. While being supplied, it is supplied to the next current plate 81-3.
- the dispersed mist is further dispersed by blocking the hand going to the plate surface of the current plate 81-3.
- the mist is dispersed by the lower current plates 81-2 and 81-1 so that the mist is widely dispersed in the space at the lowermost part of the rectifying chamber 80a.
- the position of the supply port 87a in the Y-axis direction may be provided, for example, in the vicinity of the end portion of the current plate as in this example, or depending on the degree of mist dispersion, from the front plate 86 rather than the end portion. Alternatively, they may be offset from the back plate 85.
- the dispersed mist is ejected from the mist ejection port 18 through the main body slit 85a through the guide path 83a.
- a cleaning liquid and a replacement gas are supplied from the supply port 87a.
- the end portions 81-1a to 81-4a of the current plates 81-1 to 81-4 are provided below the other portions of the current plates 81-1 to 81-4.
- the cleaning liquid and the replacement gas supplied from the port 87a can flow downward by gravity without staying on the current plate.
- the number of current plates is not limited to four, and may be one to three, or may be five or more. Good.
- the end of the current plate closest to the main body slit 85a is the main body slit 85a. It is provided so as to face in the direction opposite to the direction in which it is provided.
- the bottom plate 82 includes a connecting portion 82a and inclined portions 82b and 82c.
- the connecting portion 82a is formed so as to surround three sides of the rectangular bottom plate 82.
- the connecting portion 82a surrounds the rectangular plate at the end portions of the inclined portions 82b and 82c.
- the connecting portion 82a is connected to the lower end of the sidewall 88 by an upper flat surface (the positive direction of the Z axis).
- a recovery port 86a for connecting the raw material solution recovery line 26 is connected to one side not surrounding the square plate.
- the inclined portion 82b has an inclination that decreases in height from the position facing the recovery port 86a toward the recovery port 86a.
- the inclined portion 82c has an inclination that decreases in height from the position of the side adjacent to the surface provided with the recovery port 86a toward the recovery port 86a.
- the aggregated mist accumulates on the bottom plate 82 as a raw material solution.
- the accumulated raw material solution flows down toward the recovery port 86a by the inclined portions 82b and 82c, and is recovered through the recovery port 86a.
- the cleaning liquid that has cleaned each of the current plates 81-1 to 81-4 falls to the bottom plate 82 and flows toward the collection port 86a through the inclined portions 82b and 82c.
- the accumulated cleaning liquid is recovered through the recovery port 86a.
- the slit block 83 is a triangular prism member extending in the X-axis direction.
- This triangular prism member has a surface 83b parallel to the XY plane and a surface 83c parallel to the XZ plane orthogonal to the surface 83b.
- the slit block 83 has a slope 83d that intersects these two surfaces.
- the surface 83 b parallel to the XY plane of the slit block 83 forms a part of the bottom surface 8 b of the coating head 8 together with the slit plate 84.
- a surface 83 c parallel to the XZ plane of the slit block 83 is connected to the back plate 85.
- the slit block 83 includes a groove 83e parallel to the slope 83d.
- the groove 83e is formed along the X-axis direction, leaving both ends of the slit block 83.
- the slit plate 84 includes a bottom surface portion 84a and a slope portion 84b.
- a slope portion 84b is provided at one end of the bottom surface portion 84a.
- the slope portion 84b is provided at an angle ⁇ 1 from the bottom surface portion 84a.
- the angle ⁇ 1 is equal to the angle between the surface 83c of the slit block 83 and the inclined surface 83d.
- the length of the slope portion 84 b is substantially equal to the length of the slope surface of the slit block 83.
- the slit block 83 is connected to the lower part of the back plate 85 of the main body 80.
- the bottom surface of the slit block 83 is connected to be in the same plane as the bottom surface of the bottom plate 82 of the main body 80.
- the slit plate 84 is connected to the slope of the slit block 83 so as to be covered with the slope 84b of the slit plate 84.
- the bottom surface portion 84 a of the slit plate 84 is connected so as to be in the same plane as the bottom surface of the slit block 83 and the bottom surface of the bottom plate 82 of the main body 80.
- the bottom surface portion 84a of the slit plate 84, the surface 83b parallel to the XY plane of the slit block 83, and the bottom surface of the bottom plate 82 of the main body 80 form the bottom surface 8b of the coating head 8.
- the groove 83e is provided so as to coincide with the position of the main body slit 85a. Therefore, the groove 83e is covered with the sloped portion 84b of the slit plate 84, whereby a mist guide path 83a is formed.
- the mist guide path 83a has an angle ⁇ 1 from the surface of the back plate 85 of the main body 80.
- the angle ⁇ 1 is set to about 45 °, for example.
- the angle ⁇ 1 is not limited to this, and is set to an appropriate value depending on the raw material and film thickness of the thin film to be formed.
- the mist ejected to the surface of the substrate 9 has an angle, the turbulent flow near the surface can be suppressed and the film can be formed more uniformly than when ejected in the vertical direction. .
- Each component of the coating head 8 is formed of a material that does not corrode with respect to the raw material solution, the cleaning liquid, and the replacement gas to be used.
- the main body 80, the slit block 83, and the slit plate 84 are formed of a metal material. These members can be formed by sheet metal processing, casting processing, or the like. Not only a metal material but also synthetic resin or the like may be used for each part using an injection molding technique or the like.
- FIG. 8 is a flowchart illustrating the operation procedure of the coating head.
- Mat application process As shown in FIG. 8, when mist is applied, both the valve 25b provided in the cleaning liquid / substitution gas supply line 25 and the valve 26b provided in the raw material solution recovery line 26 are closed in step S1. . The introduction of the cleaning liquid and the replacement gas is blocked by a valve 25 b provided in the cleaning liquid / substitution gas supply line 25. Further, the valve 26 b provided in the raw material solution recovery line 26 blocks the raw material solution staying in the bottom plate 82 from flowing out of the main body 80.
- step S2 the valve 22b provided in the mist supply line 22 is opened.
- the valve 22b the mist of the raw material solution generated by the raw material solution mist making mechanism 50 is introduced into the coating head 8 from the supply port 87a.
- the mist introduced into the rectifying chamber 80a is rectified and dispersed by the current plates 81-1 to 81-4 provided in one or more stages, and reaches below the rectifying chamber 80a.
- the mist is ejected from the mist outlet 18 from the main body slit 85a through the guide path 83a.
- the mist is dispersed in the rectifying chamber 80a, but some mists are close to each other and aggregate. Moreover, the mist which was not ejected from the main body slit 85a also aggregates. The agglomerated mist stays as a raw material solution in the vicinity of the recovery port 86a by the inclined portions 82b and 82c of the bottom plate 82.
- step S3 the above-described operation is continued until the film formation is completed.
- the end of the film forming process is determined based on the film thickness, whether the film formation target substrate has reached a predetermined length, or the like.
- the process is shifted to the raw material solution recovery step.
- step S4 The raw material solution staying on the bottom plate 82 is recovered through the recovery port 86a in the raw material solution recovery step.
- step S4 the valve 22b of the mist supply line 22 is closed.
- the valve 25b provided in the cleaning liquid / substitution gas supply line 25 remains closed.
- the supply of the raw material solution is stopped by the valve 22b.
- step S5 the valve 26b of the raw material solution recovery line 26 is opened.
- the raw material solution staying in the coating head 8 is recovered via the raw material solution recovery line 26 by the valve 26b.
- the recovered raw material solution is put into, for example, the mist container 4 and reused.
- the raw material solution recovery line 26 and the mist container 4 may be fluidly connected to recover the raw material solution using a pump or the like.
- step S6 the above-described operation is continued until the raw material solution recovery is completed.
- the process is shifted to a cleaning process in the coating head.
- Whether or not the recovery of the raw material solution is completed can be determined by, for example, a level meter that detects the liquid level of the raw material solution in the vicinity of the recovery port 86a.
- the level of the raw material solution may be determined visually by using a pipe made of a transparent resin for the piping of the raw material solution recovery line 26.
- step S7 the valve 22b of the mist supply line 22 and the valve 26b of the raw material solution recovery line 26 are closed.
- the supply of the raw material solution is shut off by the valve 22b.
- the valve 26b blocks the outflow of the substance staying inside.
- step S8 the valve 25b of the cleaning liquid / substitution gas supply line 25 is opened.
- the cleaning liquid is introduced through the cleaning liquid / substitution gas supply line 25 by the valve 25b.
- the cleaning liquid is introduced from the supply port 87a.
- the cleaning liquid introduced into the rectifying chamber 80a cleans the inner wall of the rectifying chamber 80a including the surfaces of the current plates 81-1 to 81-4.
- the current plates 81-1 to 81-4 are provided below the connecting portions of the end portions 81-1a to 81-4a, respectively. Therefore, the introduced cleaning liquid cleans the surfaces of the current plates 81-1 to 81-4 and falls downward from the respective end portions 81-1a to 81-4a. The cleaning liquid that has fallen downward remains on the bottom plate 82.
- step S9 the staying cleaning liquid is recovered by opening the valve 26b of the raw material solution recovery line 26.
- the recovered cleaning liquid is recovered at a location different from the recovered raw material solution.
- step S10 the replacement gas is introduced into the rectifying chamber 80a via the cleaning liquid / replacement gas supply line 25.
- the cleaning liquid is dried by the replacement gas, and another raw material solution can be introduced.
- step S11 the above-described operation is continued until the cleaning process is completed.
- the end of the cleaning process is determined by, for example, whether or not a preset time has been reached.
- the opening and closing of the valves 22b, 25b, and 26b and the selective introduction of the cleaning liquid and the replacement gas can be controlled by using a programmable logic controller (PLC) or the like.
- PLC programmable logic controller
- the process is shifted to the raw material solution recovery process or automatically after the recovery of the raw material solution. It is also possible to make a transition to.
- the bottom plate 82 of the main body 80 includes inclined portions 82b and 82c. Since the inclined portions 82b and 82c are provided such that the height decreases toward the recovery port 86a, the condensed mist stays in the vicinity of the recovery port 86a on the bottom plate 82. Therefore, it is possible to recover the raw material solution that has accumulated through the raw material solution recovery line 26 from the recovery port 86a. Since the recovered raw material solution can be reused, the yield of the mist coating film forming apparatus 100 can be improved.
- the current plates 81-1 to 81-4 provided in the rectifying chamber 80a are provided so that the end portions thereof are lower than the height of other portions. Therefore, the cleaning liquid supplied from the upper supply port 87a easily falls on the lower bottom plate 82 after cleaning the current plates 81-1 to 81-4. Since the height of the inner surface of the bottom plate 82 is set lower toward the recovery port 86a, the cleaning liquid that has been cleaned can be easily recovered from the recovery port 86a.
- the raw material solution can be easily collected and the inside can be cleaned without removing the coating head 8 from the mist coating mechanism 70 and disassembling. Therefore, the yield of the manufactured thin film product can be improved and the manufacturing throughput can be improved.
- the coating head 8 of the present embodiment includes a slit block 83 and a slit plate 84 that form a guide path 83a having an angle ⁇ 1 from the vertical direction. Therefore, the mist rectified and dispersed in the rectifying chamber 80a can be ejected from the vertical direction to the substrate 9 at an angle ⁇ 1. By ejecting at an angle ⁇ 1, turbulence is less likely to occur near the surface of the substrate 9, and a film can be formed more stably and with a uniform film thickness.
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Abstract
Description
なお、図面は模式的または概念的なものであり、各部分の厚みと幅との関係、部分間の大きさの比率などは、必ずしも現実のものと同一とは限らない。また、同じ部分を表す場合であっても、図面により互いの寸法や比率が異なって表される場合もある。
なお、本願明細書と各図において、既出の図に関して前述したものと同様の要素には同一の符号を付して詳細な説明は適宜省略する。
図2は、本実施形態の塗布ヘッドを例示する斜視図である。図3は、図2のAA線における矢視断面図である。図4(a)~図6(c)は、本実施形態の塗布ヘッドの一部を例示する三面図である。図7は、本実施形態の塗布ヘッドを例示する一部分解組立図である。
図8は、塗布ヘッドの動作の手順を例示するフローチャートである。
(ミスト塗布工程)
図8に示すように、ミストを塗布する場合には、ステップS1において、洗浄液・置換ガス供給ライン25に設けられたバルブ25bおよび原料溶液回収ライン26に設けられたバルブ26bの両方が閉鎖される。洗浄液・置換ガス供給ライン25に設けられたバルブ25bによって、洗浄液および置換ガスの導入を遮断する。また、原料溶液回収ライン26に設けられたバルブ26bによって、ボトムプレート82に滞留する原料溶液が本体80の外に流出するのを遮断する。
ボトムプレート82上に滞留した原料溶液は、原料溶液回収工程によって、回収口86aを介して回収される。まず、ステップS4において、ミスト供給ライン22のバルブ22bが閉鎖される。洗浄液・置換ガス供給ライン25に設けられたバルブ25bは閉鎖したままである。バルブ22bによって、原料溶液の供給を停止する。
原料溶液の回収後には、他の原料溶液を用いたミストによる成膜を行う場合がある。その場合には、洗浄工程によって、先行して用いた原料溶液を洗浄する必要がある。
Claims (8)
- 原料溶液のミストまたは洗浄液のいずれかを供給することを可能とする供給口を設けたトッププレートと、
前記トッププレートの鉛直方向の下方に設けられたボトムプレートと、
前記トッププレートと前記ボトムプレートとの間に設けられ、前記トッププレートおよび前記ボトムプレートに上端および下端でそれぞれ接続されて、前記トッププレートおよび前記ボトムプレートとともに、内部空間を形成するサイドウォールと、
を含む本体を備え、
前記サイドウォールは、
前記内部空間から前記ミストを外部に噴霧するスリットと、
前記内部空間で凝集したミストまたは前記供給された洗浄液を回収することを可能とする回収口と、を含み、
前記ボトムプレートは、
前記サイドウォールの内周から前記回収口に向かって高さが低くなる傾斜面を有するミスト塗布成膜装置の塗布ヘッド。 - 前記スリットは、前記傾斜面のもっとも高い位置よりもさらに高い位置であって、鉛直方向に交差する第1方向に沿って設けられた請求項1記載の塗布ヘッド。
- 前記本体は、前記内部空間で前記サイドウォールに接続され、端部である第1端部が開放された板状の第1カレントプレートを含み、
前記サイドウォールは、鉛直方向および鉛直方向に交差する第1方向を含む面に平行し、前記スリットが形成された第1壁部を含み、
前記第1カレントプレートは、前記第1壁部から前記第1端部に向かって延伸し、
前記第1端部は、前記第1カレントプレートの他の部分よりも高さの低い位置に設けられた請求項1記載の塗布ヘッド。 - 前記スリットは、前記第1方向に沿って設けられ、
前記端部は、前記第1方向に沿って設けられた請求項3記載の塗布ヘッド。 - 前記サイドウォールは、前記第1壁部に対向する位置に設けられた第2壁部を含み、
前記第2壁部から前記第1壁部に向かって延伸し、前記第1端部よりも上方に設けられた端部である第2端部を有する第2カレントプレートをさらに備えた請求項3記載の塗布ヘッド。 - 前記スリットから噴出される前記ミストは、鉛直方向から所定の角度をもって噴出される請求項1記載の塗布ヘッド。
- 前記スリットから噴出される前記ミストを誘導する誘導路を含むミスト誘導部材をさらに備え、
前記誘導路は、前記所定の角度で形成された請求項6記載の塗布ヘッド。 - 原料溶液のミストまたは洗浄液のいずれかを供給することを可能とする供給口を設けたトッププレートと、
前記トッププレートの鉛直方向の下方に設けられたボトムプレートと、
前記トッププレートと前記ボトムプレートとの間に設けられ、前記トッププレートおよび前記ボトムプレートに上端および下端でそれぞれ接続されて、前記トッププレートおよび前記ボトムプレートとともに、内部空間を形成するサイドウォールと、
を含む本体を含み、
前記サイドウォールは、
前記内部空間から前記ミストを外部に噴霧するスリットと、
前記内部空間で凝集したミストまたは前記供給された洗浄液を回収することを可能とする回収口と、を含み、
前記ボトムプレートは、
前記サイドウォールの内周から前記回収口に向かって高さが低くなる傾斜を有するミスト塗布成膜装置の塗布ヘッドをメンテナンスするメンテナンス方法であって、
前記供給口の供給弁を閉鎖して前記ミストの供給を停止し、
前記回収口の回収弁を開放して凝集した前記ミストを回収し、
前記回収弁を閉鎖して前記ミストの回収を停止し、
前記供給弁を開放して前記洗浄液を供給し、
前記洗浄液の供給を停止した後、前記供給弁の開放を維持して、置換ガスを供給する塗布ヘッドのメンテナンス方法。
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US11484893B2 (en) | 2022-11-01 |
JPWO2018220756A1 (ja) | 2019-11-07 |
TW201902577A (zh) | 2019-01-16 |
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