tft-lcd array substrate and its manufacturing method and liquid crystal display

Abstract

The invention relates to a TFT-LCD array substrate, a manufacturing method thereof and a liquid crystal display. The array substrate includes gate lines and data lines formed on the substrate, pixel electrodes and thin film transistors are formed in pixel regions defined by the gate lines and data lines, and columnar spacers are formed at the intersections of the gate lines and data lines . The columnar spacers and the pixel electrodes are formed in the same patterning process. The manufacturing method includes: forming a pattern including a gate line and a gate electrode; forming a pattern including a data line, a drain electrode, a source electrode and a TFT channel; forming a pattern including a passivation layer via hole; depositing a transparent conductive film and forming it through a patterning process Including patterns of pixel electrodes and columnar spacers. In the present invention, the columnar spacer is arranged at the overlap of the grid line and the data line, and the end part is in contact with the lower black matrix on the color filter substrate, so that the columnar spacer is in a relatively stable state, effectively avoiding The occurrence of display defects such as light leakage and contact watermarks is eliminated.

Description

technical field [0001] The invention relates to a liquid crystal display structure and a manufacturing method thereof, in particular to a TFT-LCD array substrate, a manufacturing method thereof and a liquid crystal display. Background technique [0002] In flat panel display technology, Thin Film Transistor Liquid Crystal Display (TFT-LCD) has the characteristics of small size, low power consumption, no radiation and relatively low manufacturing cost, so it occupies a dominant position in the flat panel display market . [0003] The main structure of TFT-LCD is formed by combining the array substrate and the color filter substrate and injecting liquid crystal into them. Gate lines, data lines, common electrode lines, and thin film transistors and pixel electrodes arranged in a matrix are formed on the array substrate. The gate lines and data lines define pixel areas, and the thin film transistors and pixel electrodes are formed in each pixel area. The color filter substrat...

AI Technical Summary

Problems solved by technology

Since this contact position belongs to the highest position of the array substrate, when the array substrate or the color filter substrate is squeezed or impacted, the columnar spacer will automatically move to a lower position, and it is difficult to return to the original position, so the prior art This structure can easily lead to misalignment between the array substrate and the color filter substrate, which in turn causes display defects such as light leakage and touch mura.

In addition, the process of forming columnar spacers in the prior art is to first form a color filter structure pattern or an array structure pattern, and then form a columnar spacer through a patterning process, which has defects such as many steps in the preparation process and low efficiency.

Images