# US 2014/0193583 A1 · Method and device for coating with polyimide solution > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0193583 A1 - Document ID: US20140193583A1 - Status: Published application - Kind: A1 - Application number: 13/824,386 - Filed: 2013-01-22 - Published: 2014-07-10 - Earliest claimed: 2013-01-09 - Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd. - Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd. - Inventors: Ming Liu - Web page: https://patentgrep.com/patent/US20140193583A1 ## CPC - C09D 179/08: Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors - B32B 17/06: comprising glass as the main or only constituent of a layer, next to another layer of a specific {material} - B32B 17/10174: {Coatings of a metallic or dielectric material on a constituent layer of glass or polymer} - C03C 17/32: with synthetic or natural resins (C03C17/30 takes precedence) - C08J 7/0427: {with only one layer of a composition containing a polymer binder (with more layers C08J7/042)} - B05D 3/0218: {Pretreatment, e.g. heating the substrate} - B05D 2203/35: Glass - B32B 2379/08: Polyimides - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - 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 - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) ## Abstract A method and device for coating with polyimide solution are provided. The method includes the following steps: placing a glass substrate onto a support surface to form a face contact therebetween; heating the glass substrate to a preset coating temperature through the support surface; and coating the glass substrate with the polyimide solution. With the glass substrate heated before being coated, the polyimide solution diffusion and solvent evaporation during coating can be accelerated, which is conducive to controlling the temperature uniformity and consistency and preventing the cloud-like spots. The glass substrate in face contact with the support plate is more conducive to being fully heated, and can prevent the glass substrate from being heated non-uniformly due to the contact of the glass substrate with the supporting legs, thereby preventing the foot-like spots. ## Claims ### Claim 1 A method for coating with polyimide solution comprises the following steps: placing a glass substrate onto a support surface to form a face contact therebetween; heating the glass substrate to a preset coating temperature through the support surface; and coating the glass substrate with the polyimide solution. ### Claim 2 (depends on 1) The method of claim 1, wherein, the preset coating temperature is lower than the boiling point of the solvent in the polyimide solution. ### Claim 3 (depends on 2) The method of claim 2, wherein, the preset coating temperature is within the range of 50° C.-110° C. ### Claim 4 (depends on 1) The method of claim 1, wherein, the mass percentage of the solute in the polyimide solution is less than 20%. ### Claim 5 (depends on 1) The method of claim 1, wherein, an external surface of a support plate with a built-in infrared heating device or electric heating plate is used as the support surface in the method, and the glass substrate is heated through the support surface by the infrared heating device or electric heating plate. ### Claim 6 (depends on 5) The method of claim 5, wherein, the method further includes the following step: after placing the glass substrate onto the support surface, vacuuming the space between the glass substrate and the support surface to make the glass substrate contact with the support surface in vacuum. ### Claim 7 (depends on 3) The method of claim 3, wherein, the method further includes the following step: plating the support surface with antistatic material before placing the glass substrate onto the support surface. ### Claim 8 (depends on 1) The method of claim 1, wherein, the surface of a heating liquid is used as the support surface in the method, through which the glass substrate is heated by the heating liquid. ### Claim 9 A device for coating with polyimide solution comprises a support plate for supporting a glass substrate to be coated with the polyimide solution, a heating device for heating the glass substrate is provided in the support plate and some through-holes communicated with a vacuum device are provided in the support plate towards its thickness direction. ### Claim 10 (depends on 9) The device of claim 9, wherein, the device further includes a pick-and-place groove located at the side of the support plate facing the glass substrate, pick-and-place into which a manipulator inserts to pick/place the glass substrate. ### Claim 11 A method for coating with polyimide solution comprises the following steps: placing a glass substrate onto a support plate to form a face contact between the glass substrate and the external surface of the support plate; vacuuming the space between the glass substrate and the external surface of the support plate through through-holes located in the thickness direction of the support plate with a vacuum device, to make the glass substrate contact with the external surface of the support plate in vacuum; heating the glass substrate to a preset coating temperature through the external surface of the support plate with a heating device arranged inside the support plate; and coating the glass substrate with the polyimide solution. ### Claim 12 (depends on 11) The method of claim 11, wherein, the preset coating temperature is lower than the boiling point of the solvent in the polyimide solution. ### Claim 13 (depends on 12) The method of claim 12, wherein, the preset coating temperature is within the range of 50° C.-110° C. ### Claim 14 (depends on 11) The method of claim 11, wherein, the mass percentage of the solute in the polyimide solution is less than 20%. ### Claim 15 (depends on 11) The method of claim 11, wherein, the method further includes the following step: plating the external surface of the support plate with antistatic material before placing the glass substrate onto the support plate.