Patent ID: 9190432
Filing Date: 2015-11-17
Classification: H01L

Abstract:
1. A manufacturing method of an oxide thin-film transistor array substrate, comprising: forming a pattern comprising a gate insulating layer, an oxide active layer and an etch barrier layer on a substrate on which a pattern of a gate line and a gate electrode is formed, by one patterning process, wherein the step of forming the pattern comprising the gate insulating layer, the oxide active layer and the etch barrier layer on the substrate on which the pattern of the gate line and the gate electrode is formed, by one patterning process comprises the following steps: forming a gate insulating layer film, an oxide active layer film and an etch barrier layer film on the substrate on which the pattern of the gate line and the gate electrode is formed in sequence; coating a photoresist on the substrate on which the gate insulating layer film, the oxide active layer film and the etch barrier layer film are formed; exposing the photoresist by a half-tone mask or a gray-tone mask and forming a photoresist-completely-retained region, a photoresist-half-retained region and a photoresist-completely-removed region after developing, wherein in a pixel unit, the photoresist-completely-retained region corresponds to a region of a pattern of the etch barrier layer, the photoresist-half-retained region corresponds to a region of a pattern of the oxide active layer except the region of the pattern of the etch barrier layer, and the photoresist-completely-removed region corresponds to a region except the photoresist-completely-retained region and the photoresist-half-retained region; removing the oxide active layer film and the etch barrier layer film in the photoresist-completely-removed region by an etching process, and forming the pattern of the oxide active layer; removing the photoresist in the photoresist-half-retained region by an ashing process; removing the etch barrier layer film in the photoresist-half-retained regions by an etching process, and forming the pattern of the etch barrier layer; and removing the photoresist in the photoresist-completely-retained region to expose the etch barrier layer and the oxide active layer.