Array substrate and manufacturing method therefor

Abstract

The invention provides an array substrate and a manufacturing method therefor. According to the manufacturing method for the array substrate, a halftone photomask and a one-time photoetching process are adopted to perform patterning processing for a passivation layer and an etching stop layer; a first via hole corresponding to the upward side of a source electrode is formed in the passivation layer; a second via hole and a third via hole positioned between the source electrode and the drain electrode are formed in the etching stop layer; then a pixel electrode connected with the source electrode through the first via hole, a first connecting layer connected with the source electrode and the active layer through the second via hole, and a second connecting layer connected with the drain electrode and the active layer through the third via hole are formed above the passivating layer, the source electrode, the drain electrode and the etching stop layer through the one-time photoetching process. By adoption of the processes, the number of the photoetching processes of an IGZO (indium gallium zinc oxide) array substrate with the etching stop layer structure is reduced; the six times of photoetching process in the prior art are reduced to five times, so that one time of photoetching process is saved, the use of the light-shading cover is reduced, and the production cost of the IGZO array substrate is lowered consequently.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to an array substrate and a manufacturing method thereof. Background technique [0002] With the development of display technology, liquid crystal displays (Liquid Crystal Display, LCD) and other flat display devices are widely used in mobile phones, TVs, personal digital assistants due to their advantages of high image quality, power saving, thin body and wide application range. , digital cameras, notebook computers, desktop computers and other consumer electronics products have become the mainstream of display devices. [0003] Most of the liquid crystal display devices currently on the market are backlight liquid crystal displays, which include a liquid crystal display panel and a backlight module. The working principle of the liquid crystal display panel is to place liquid crystal molecules between two parallel glass substrates. There are many vertical and horizontal s...

AI Technical Summary

Problems solved by technology

In the currently commonly used IGZO array substrates, the Etching Stop Layer (ESL, EtchingStopLayer) structure device has better electrical stability than other structures due to the existence of a protective layer, but the IGZO array with an etch stop layer structure Substrates generally require 6 photolithography processes, so 6 photomasks need to be prepared, and the production cost is high. Therefore, reducing the number of photomasks is of great significance for the development of low-cost IGZO array substrates

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