Film transistor array substrate, preparation method thereof and liquid crystal panel

Abstract

The invention discloses a film transistor array substrate which comprises a plurality of film transistors arranged on one glass substrate in an array manner. Each film transistor comprises a grid electrode formed on the glass substrate, a grid electrode insulating layer covering the grid electrode, an active layer arranged on the grid electrode insulating layer, and a source electrode and a drain electrode which are formed on the active layer, wherein the source electrode and the drain electrode are spaced in a first direction, and the region, corresponding to the interval between the source electrode and the drain electrode, of the active layer is a channel region; the surface, facing the active layer and at least corresponding to the channel region, of the grid electrode insulating layer is provided with a plurality of protruding structures, and a wrinkled surface with a plurality of grooves is formed; and the surface, facing the grid electrode insulating layer, of the active layer is totally engaged with the surface of the grid electrode insulating layer. The invention further discloses a preparation method of the film transistor array substrate and a liquid crystal panel comprising the film transistor array substrate.

Description

Technical field [0001] The present invention relates to the technical field of liquid crystal display, in particular to a thin film transistor array substrate and a preparation method thereof, and also to a liquid crystal panel containing the thin film transistor array substrate. Background technique [0002] Liquid crystal display (LiquidCrystalDisplay, LCD), is a flat ultra-thin display device, it is composed of a certain number of color or black and white pixels, placed in front of the light source or reflector. Liquid crystal displays have very low power consumption, high image quality, small size, and light weight, so they are very popular and become the mainstream of displays. At present, the liquid crystal display is mainly a thin film transistor (TFT) liquid crystal display, and the liquid crystal panel is the main component of the liquid crystal display. [0003] A commonly used liquid crystal panel at least includes a thin film transistor array substrate and a color filt...

AI Technical Summary

Problems solved by technology

In order to ensure the resolution of the display screen, the area of ​​the pixel area needs to be as small as possible, and the aperture ratio needs to be as large as possible. Therefore, the driving thin film transistor and peripheral circuits cannot exceed a certain area, which determines the channel area width of the thin film transistor. W cannot be made too wide. In this case, it is necessary to increase the width-to-length ratio of the channel region of the thin film transistor, which can only be solved by reducing the length L. However, reducing the length L of the channel region of the thin film transistor to a certain extent will cause leakage. Phenomena such as current and channel breakdown, causing thin film transistors to fail to work

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