Thin film transistor array substrate, manufacturing method thereof, and liquid crystal display device

Abstract

The invention discloses a film transistor array substrate and a manufacturing method thereof, and a liquid crystal display device. According to the film transistor array substrate, a first insulation protection layer of the substrate is formed on the substrate and covers a first metal layer, a semiconductor layer is formed on the first insulation protection layer and is arranged above the first metal layer, a second metal layer is formed on the first insulation protection layer and comprises a source electrode, a drain electrode and a data line, a second insulation protection layer is formed on the first insulation protection layer, the second insulation protection layer is provided with first through holes corresponding to the source electrode and the drain electrode, the second insulation protection layer covers the second metal layer except the first through holes, a first electrode is formed on the second insulation protection layer and covers the source electrode and the drain electrode in the first through holes, a third insulation protection layer is formed on the first electrode and further covers the semiconductor layer exposed among the second insulation protection layer, the first electrode, the source electrode and the drain electrode, and a second electrode is formed on the third insulation protection layer. Through the film transistor array substrate, an opening rate and a penetration rate of the liquid crystal display device can be improved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, and in particular to a thin film transistor array substrate and a manufacturing method thereof, and a liquid crystal display device using the thin film transistor array substrate. Background technique [0002] At present, the display screens of liquid crystal display devices (LCD, Liquid Crystal Display) are getting larger and larger, and in large-size display screens, the higher the number of pixels per inch (PPI, Pixels Per Inch) is, it means that the display The higher the density that the screen can display an image, the more detailed the image will be. However, in a display area of ​​the same size, the higher the number of pixels, the smaller the area of ​​the formed pixel area, and the smaller the area of ​​the light-transmitting area in each pixel area. Therefore, the existing high PPI The aperture ratio and transmittance of liquid crystal display devices are still low. In...

AI Technical Summary

Problems solved by technology

The liquid crystal display device includes an opposing thin film transistor array substrate 1 and a color filter substrate. The color filter substrate is provided with a black matrix layer (not shown) for blocking all opaque materials in the two substrates. If the drain If the area of ​​14b is too large, the black matrix layer should be correspondingly made to match the area of ​​the drain 14b to cover the drain 14b, and the aperture ratio and transmittance of the finally formed liquid crystal display device are still low

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