Manufacturing method of color filter layer
A technology of color filter layer and manufacturing method, which is applied in optics, nonlinear optics, instruments, etc., can solve problems such as poor fluidity of liquid crystal molecules, influence on display effect, and large-angle segment difference, so as to reduce thickness, save cost, and avoid The effect of angular difference
Active Publication Date: 2022-04-29
INESA DISPLAY MATERIALS
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Problems solved by technology
In the production process of traditional color filter substrates, in the overlapping (overlapping) areas of each color filter layer and black matrix layer, the height of the laminated part is higher than that of other areas, resulting in a large angular difference. Such a difference in angular segment will deteriorate the fluidity of the liquid crystal molecules that are in contact with the alignment layer, which will cause problems such as pressing color difference, which will affect the display effect.
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[0022] Please refer to figure 1 , if the existing common photomask is directly used for the formation process of the color filter layer, the corresponding steps can be referred to Figure 1 to Figure 3 shown.
[0023] A black matrix layer 110 is formed on the transparent substrate 100, the black matrix layer 110 has a plurality of openings, figure 1 Only one of the openings 111 is shown as a representative.
[0024] After that, refer to figure 1 and figure 2 ,exist figure 1 The first color filter material layer 120 is formed in the opening 111 in the center, and then the first color filter material layer 120 is exposed with a photomask 130 .
[0025] After that, refer to figure 2 and image 3 The exposed first color filter material layer 120 is further subjected to steps such as developing and baking, so as to become the first color filter layer 120z. Thereafter, the same process as above is repeated, thereby forming the second color filter layer 140z and the thir...
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Abstract
A method for manufacturing a color filter layer, comprising: forming a black matrix layer on a transparent substrate, the black matrix layer having a plurality of openings; forming a first color photoresist material layer in a first number of openings, the first color photoresist layer The material layer fills the opening, and the first color photoresist layer has an overlapping portion covering the black matrix layer; the first photomask is used as a mask to expose the first color photoresist layer; the first photomask has a polygonal opening. A hole and a transmittance gradient area located on at least one edge of the opening; the opening is located just above the opening; the first color photoresist layer after exposure is developed, so that after development, the overlapping portion becomes an undercut structure shape; baking the developed first color photoresist material layer, so that the overlapping portion of the undercut structure collapses, thereby reducing the final thickness of the overlapping portion to form a first color filter layer. The manufacturing method improves the quality of the formed color filter layer.
Description
technical field [0001] The invention relates to the field of liquid crystal display, in particular to a manufacturing method of a color filter layer. Background technique [0002] A liquid crystal display (LCD) typically has a color filter substrate. Taking the color filter substrate in TFT (Thin Film Transistor)-LCD as an example, the current color filter substrate for liquid crystal display is mainly composed of transparent glass substrate, black matrix layer (BM layer) and color photoresist layer (RGB layer) and other structures. . The three primary colors of red (R), green (G) and blue (B) of the color filter substrate are arranged in a certain pattern, and are connected with the sub-pixels (one pixel consists of three sub-pixels) on the array substrate (usually used to make corresponding thin film transistors). Pixel composition) one-to-one correspondence. The white light emitted by the LCD backlight passes through the color filter substrate to form light of various ...
Claims
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IPC IPC(8): G02F1/1335
CPCG02F1/133512G02F1/133514G02F1/133516
Inventor 纪荣昌许雅菁于海涛张莉王红光
Owner INESA DISPLAY MATERIALS