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Method and device for coating polyimide solution

A polyimide and coating method technology, which is applied to the device, coating, optics and other directions of coating liquid on the surface, can solve the problem of spots on the display, avoid uneven heating, avoid cloudy spots, prevent The effect of foot spots

Active Publication Date: 2013-04-17
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a method and device for coating a polyimide solution, which overcomes the defect that easily causes spots on the display in the prior art

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  • Method and device for coating polyimide solution
  • Method and device for coating polyimide solution
  • Method and device for coating polyimide solution

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0026] See figure 1 , is a flow chart of the PI solution coating method provided in the first embodiment of the present invention, including:

[0027] Step S100 , placing the glass substrate on the supporting surface, and making the glass substrate and the supporting surface form surface contact.

[0028] Step S101 , heating the glass substrate through the supporting surface, so that the glass substrate reaches a preset coating temperature.

[0029] Step S102, co...

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Abstract

An embodiment of the invention discloses a method and a device for coating polyimide solution. The method includes placing a glass substrate on a support surface and enabling the glass substrate to be in surface contact with the support surface; heating the glass substrate via the support surface so that the temperature of the glass substrate reaches a preset coating temperature; and coating the polyimide solution on the glass substrate. The method and the device have the advantages that the diffusion speed of the polyimide solution and the evaporation speed of solvents can be increased during coating by heating the glass substrate before the polyimide solution is coated on the glass substrate, the temperature uniformity and the temperature consistency are controlled advantageously, and cloud-shaped spots are prevented; and the glass substrate is sufficiently heated advantageously owing to the fact that the glass substrate is in surface contact with a support plate, the problem that an existing glass substrate is heated unevenly when the existing glass substrate is in point contact with support feet can be avoided, and foot-shaped spots are prevented.

Description

technical field [0001] The invention relates to the field of display manufacturing, in particular to a polyimide solution coating method and device. Background technique [0002] In the liquid crystal display manufacturing process, it is necessary to coat the polyimide (Polyimide, PI) solution on the surface of the glass substrate. After the coating is completed, the liquid solvent in the PI solution is volatilized by heating and drying, and the solid component is left. A uniform thin film is formed as an alignment film to characterize liquid crystal molecules. [0003] A common PI solution coating device includes a heating plate, which is provided with supporting feet, and the glass substrate is fixed above the heating plate through the supporting feet. The heating plate heats the air above it, and then heats the glass substrate through high-temperature air. A major problem with this device is that because the supporting legs are in contact with the glass substrate and the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337B05C9/14B05C13/02B05D7/00
CPCB05D3/0218B05D2203/35C03C17/32
Inventor 刘明
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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