Color film substrate as well as production method thereof and display device

Abstract

The invention discloses a color film substrate as well as a production method thereof and a display device. The color film substrate comprises a substrate, a black matrix layer, a flat layer and auxiliary spacers, wherein the black matrix layer is arranged on the substrate; the flat layer is arranged on the black matrix layer; the lower parts of the auxiliary spacers are arranged in holding holes; the holding holes comprise first holding parts and second holding parts; the first holding parts penetrate through the flat layer; the second holding parts are formed on the black matrix layer and are communicated with the first holding parts. The display device comprises the color film substrate. The preparation method comprises the following steps: forming the black matrix layer with the second holding parts of the holding holes on the substrate; forming the flat layer with the first holding parts of the holding holes; forming the auxiliary spacers. The color film substrate has the beneficial effects that the elasticity of the color film substrate can be improved by increasing the absolute heights of the auxiliary spacers; besides, the forming processes of a main spacer and the auxiliary spacers can be separately controlled, thus achieving the aim of stably controlling the film thickness of the main spacer and the auxiliary spacers.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a color filter substrate, a manufacturing method thereof, and a display device having the color filter substrate. Background technique [0002] Traditional liquid crystal display panels all include a layer of color film substrate, which is mainly used to filter the white light from the backlight into the three primary colors of red, green, and blue light to achieve different color displays. [0003] figure 1 It shows a cross-sectional view of a traditional color filter substrate. The upper layer of the base substrate 100 is a black matrix layer 101, the color filter layer 102 is distributed in the middle of the black matrix layer 101, and a flat surface is covered on the black matrix layer 101 and the color filter layer 102. layer 103 (also referred to as a transparent planarization layer), the top surface of the planarization layer 103 is provided with a main spa...

AI Technical Summary

Problems solved by technology

[0004] The traditional spacer process uses the same half-tone mask, and the different transmittances of the openings form the height difference between the main spacer and the auxiliary spacer. However, this method has higher requirements for the photoresponse characteristics of the spacer material. high

When making spacers, if a large exposure is used, the reaction of the main spacer area will be sufficient, and the uniformity of film thickness can be controlled stably, but the height difference from the auxiliary spacer area is not easy to control

Using a small exposure amount, stable control of the height difference can be achieved, but there is a risk of incomplete material reaction in the main spacer area, and the uniformity is difficult to control

[0005] In addition, in the traditional color filter substrate structure, the main spacer and the auxiliary spacer are designed on the same base, so that the absolute height of the auxiliary spacer is lower than that of the main spacer, and the drop in height will reduce the spacer’s elasticity

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