Thin-film transistor array substrates, manufacturing method and LCD device containing the same

Abstract

This invention discloses an array base board of a film transistor including multiple signal lines, multiple grid lines crossly set with the signal lines, a pixel electrode and a film transistor, in which, a grid insulation layer set between the signal line layer and the grid line layer includes an ionic injection region injected by ionic elements. This invention also discloses a method for manufacturing array base boards of film transistors including: forming grid lines and signal lines, forming a grid insulation layer, forming a film transistor, and the source of which is connected with the pixel electrode electrically in the pixel region determined by intercrossing the grid lines and the signal lines and the drain of which is connected with the signal lines electrically, and part of the grid insulation layer are injected with ionic elements to form ionic injection regions, which can reduce dielectric constant of grid insulation layer so as to reduce feed-through voltage and DC bias and increase display effect of LC panels.

Description

technical field [0001] The present invention relates to a thin film transistor, in particular to the thin film transistor array substrate and its manufacturing method. Background technique [0002] Generally, a liquid crystal display (LCD: Liquid Crystal Display) includes two panels respectively provided with electrodes thereon and a liquid crystal layer disposed between the two panels. The transmittance of light is controlled by adjusting the voltage value between the two electrodes, which is also called the liquid crystal voltage. In the normally white mode (NormallyWhite: NW), the light transmittance is inversely proportional to the liquid crystal voltage, that is, the larger the liquid crystal voltage value, the lower the light transmittance; the smaller the liquid crystal voltage value, the lower the light transmittance. high. [0003] Generally speaking, the voltage applied to the liquid crystal is the voltage difference between the common electrode line and the pixe...

AI Technical Summary

Problems solved by technology

[0026] In the prior art, in order to improve the pixel storage capacitance C ST In order to reduce the charge loss, the dielectric constant of the gate insulating layer 104 of the liquid crystal panel is often set to be relatively large, resulting in a feed-through voltage V FD Numerical increase

According to the above, it can be seen that the feedthrough voltage has a great influence on the pixel voltage, and the greater the liquid crystal voltage, the lower the light transmittance and the worse the display effect

Therefore, increasing V FD Although the value can increase the pixel storage capacitor C ST , but at the same time it will also increase the DC bias applied to the liquid crystal, resulting in a decrease in the display effect

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