Alignment film manufacturing method, manufacturing device and alignment film
A production method and technology of alignment film, which are applied in instruments, nonlinear optics, optics, etc., can solve problems such as easy generation of impurities, and achieve the effect of reducing impurities
Inactive Publication Date: 2019-06-04
BOE TECH GRP CO LTD +1
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Problems solved by technology
[0004] The purpose of the present invention is to solve the problem that impurities are easily generated in the existing alignment film manufacturing method
Method used
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[0037] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0038] The present invention provides a solution to the problem that impurities are easily formed during the production process of the alignment film in the prior art and easily form bright spots on the display screen after being diffused into the liquid crystal layer.
[0039] On the one hand, embodiments of the present invention provide a method for fabricating an alignment film, such as figure 1 shown, including:
[0040] Step 11, coating a resistive polyamide copolymer on the base substrate to generate the first layer of the alignment film;
[0041] Step 12, performing an amination reaction on the first layer;
[0042] Step 13, coating the photosensitive polyamide copolymer on the base substrate with the aminated first layer to form the second laye...
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The invention provides a manufacturing method of an alignment film, a manufacturing device and the alignment film. The manufacturing method comprises the following steps: coating a substrate with a resistive polyamide copolymer, and generating a first graphic layer of the alignment film; performing amination on the first graphic layer; coating the substrate on which the first graphic layer subjected to amination is formed, with a photosensitive polyamide copolymer, and generating a second graphic layer of the alignment film; illuminating the second graphic layer to form trenches for directionally arraying liquid crystal molecules in the second graphic layer; and performing amination on the second graphic layer. According to the manufacturing method, the first graphic layer with the resistive polyamide copolymer and the second graphic layer with the photosensitive polyamide copolymer are respectively subjected to amination, so that the interaction between the first graphic layer and the second graphic layer can be avoided, and small molecules are produced, so that the phenomenon that spots appear in a displayed picture due to the fact that small-molecular substances are dispersed into a liquid crystal layer to be polymerized into large particles is further prevented.
Description
technical field [0001] The present invention relates to the manufacturing field of displays, in particular to a method for manufacturing an alignment film, a manufacturing device and the alignment film. Background technique [0002] The orientation of liquid crystal in liquid crystal display technology is very important. The production process of polyimide (PI) is: through the polymerization reaction of dianhydride and diamine at low temperature, polyamic acid (referred to as PA) is formed, and dehydrated and solidified at high temperature. After (chemically it is a kind of cyclization reaction), it becomes polyimide; polyimide acid has good solubility, easy to adjust concentration and viscosity; curing forms insoluble and stable polyimide film, appropriate curing conditions It can be used after thorough polyamideization; the surface of the PI film can be rubbed to make grooves, so that the liquid crystal molecules are aligned, but this Rubbing (rubbing orientation) method i...
Claims
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IPC IPC(8): G02F1/1337
CPCG02F1/133788
Inventor 王慧莲王炎佟洁王学路刘金山丁磊
Owner BOE TECH GRP CO LTD