tft-lcd array substrate and manufacturing method thereof

Abstract

The invention relates to a TFT-LCD (Thin Film Transistor Liquid Crystal Display) array substrate and a manufacture method thereof. The array substrate comprises a grid line and a data line which are formed on the substrate, wherein a pixel region limited by the grid line and the data line is internally provided with a pixel electrode and a film transistor, and a storage electrode forming a storage capacitor together with the pixel electrode is arranged above the grid line. Furthermore, the storage electrode and the data line are arranged in the same layer, and the storage electrode is connected with the grid line through a grid insulation layer arranged on a grid insulation layer film. The storage electrode is arranged above the grid line at two sides of the data line in fragments. By arranging the storage electrode above the grid line, the invention improves the storage capacitor per area, and can not shade the pixel region, thereby effectively improving the aperture opening ratio and the display brightness, and integrally enhancing the display quality.

Description

Technical field [0001] The invention relates to a thin film transistor liquid crystal display structure and a manufacturing method thereof, in particular to a TFT-LCD array substrate and a manufacturing method thereof. Background technique [0002] Thin Film Transistor Liquid Crystal Display (TFT-LCD for short) has the characteristics of small size, low power consumption, and no radiation, and it occupies a dominant position in the current flat panel display market. [0003] The TFT-LCD is mainly composed of an array substrate and a color filter substrate of a pair of boxes, wherein thin film transistors and pixel electrodes arranged in a matrix are formed on the array substrate, and each pixel electrode is controlled by a thin film transistor. When the thin film transistor is turned on, the pixel electrode is charged during the on time. After the charging is completed, the pixel electrode voltage will be maintained until the next scan is recharged. Generally speaking, the liquid ...

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Problems solved by technology

It can be seen from the calculation formula of the storage capacitor that the size of the storage capacitor per unit area is inversely proportional to the distance between the two electrode plates. Since the existing TFT-LCD array substrate has a gate insulating film and a passivation layer between the two electrode plates of the storage capacitor layer of thin film, the distance between the two electrode plates is relatively large, so the storage capacitance per unit area is relatively small

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