A kind of color film substrate and preparation method thereof, liquid crystal display

Abstract

The embodiment of the invention provides a color film substrate and a preparation method thereof as well as a liquid crystal display. Under the condition of not needing to introduce an OC (Over Coating) layer, a segment difference generated by protrusions at lapped positions of black matrixes relative to flat parts in the production process of a color filter layer can be reduced. The preparation method of the color film substrate comprises the following step of forming the black matrixes on a substrate and the color filter layer positioned above the black matrixes, wherein the color filter layer comprises first primary-color filter patterns, second primary-color filter patterns and third primary-color filter patterns, and one protrusion is arranged at a lapped position between each filter pattern and the corresponding black matrix; the method also comprises the following steps of forming etching protection layers which expose out of the protrusions; etching the exposed protrusions to flatten the surfaces of all the filter layers; removing the etching protection layers. The preparation method is used for the color film substrate and the liquid crystal display applying the color film substrate.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a color filter substrate, a preparation method thereof, and a liquid crystal display. Background technique [0002] A Liquid Crystal Display (LCD for short) has the characteristics of small size, low power consumption, and no radiation, and occupies a dominant position in the current display market. [0003] The liquid crystal display includes an array substrate and a color filter substrate, wherein the color filter substrate includes a black matrix and a color filter layer, and the color filter layer includes a first primary color such as a red filter pattern, a second primary color such as a green filter pattern, and a third primary color For example a blue filter pattern. Such as figure 1 As shown, its preparation method is: forming a black matrix 20 on the base substrate 10, and forming a red filter pattern 31, a green filter pattern 31 and a blue filter pattern 33 above t...

AI Technical Summary

Problems solved by technology

Due to the existence of the protrusion 34, uneven coating will occur when the alignment film is subsequently formed, that is, at the protrusion 34, the alignment film is not coated due to the level difference, so that when the color filter substrate is applied When using LCD monitors, there will be poor display

[0005] In order to solve the above problems, it was proposed to make a thicker OC (Over Coating, coating protection) layer on the color filter layer, hoping to smooth the above-mentioned step difference. However, because the OC layer is too thick, the gas in it will Volatilization causes vacuum bubbles in the cell of the liquid crystal display, so the OC layer cannot be made too thick, so the above-mentioned step difference cannot be eliminated

Moreover, the introduction of the OC layer will also lead to an increase in the thickness of the entire liquid crystal display, which is not conducive to the thinning of the liquid crystal display

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