Light filter manufacturing method and exposure mask plate

Abstract

Provided are a light filter manufacturing method and an exposure mask plate. The light filter manufacturing method comprises the step of providing a substrate; forming a black matrix with a net structure on the substrate, wherein the black matrix is provided with an opening and exposed out of the surface of the substrate; forming a negative photoresist material on the surfaces of the substrate and the black matrix; adopting the exposure mask plate to conduct exposure treatment on the photoresist material and enabling the exposure amount received by a overlapped region of the photoresist material and the black matrix to be smaller than the exposure amount received by the residual open region; conducting developing treatment on the exposed photoresist material to form a light resistance layer. The exposure mask plate is used for the light filter manufacturing method. The exposure mask plate comprises a shading region and an exposure region, wherein multiple protrusion structures are arranged at the edge position in contact with the exposure region in the shading region. The horned portions of the light resistance layer can be decreased or eliminated, the phenomenon that poor liquid crystal deflection caused by too thick horns influences a light filer and the display performance of a liquid crystal display is prevented, and further the cost of light filter can be reduced.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a method for manufacturing an optical filter and an exposure mask. Background technique [0002] At present, liquid crystal display (Liquid Crystal Display, LCD) technology has developed rapidly, and great progress has been made in terms of screen size and display quality. LCD has the characteristics of small size, low power consumption, and no radiation. Occupied a dominant position in the field of flat-panel display. The liquid crystal display panel is the main component of the liquid crystal display, which can be formed by laminating a thin film transistor (Thin Film Transistor, TFT) substrate and another color filter (Color Filter, CF) substrate, and the liquid crystal layer is located between the two substrates . [0003] refer to figure 1 As shown, a kind of optical filter used in liquid crystal display in the prior art can comprise: [0004] glass substr...

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Problems solved by technology

[0012] In the prior art, it is necessary to arrange a flat layer 40 on the photoresist layer 30 to make its upper surface relatively flat, so as to reduce the influence of the horns 70 on the display performance, but the process and cost are increased, and the thickness and cost of the optical filter are greatly increased. increase, light transmittance decreases

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