Patent ID: 9171864
Filing Date: 2015-10-27
Classification: H01L

Abstract:
1. A method of manufacturing a display substrate, the method comprising: forming sequentially a gate metal pattern, a gate insulation layer and an oxide semiconductor layer on a base substrate; forming a first photoresist layer on the oxide semiconductor layer; exposing the first photoresist layer to form a first photoresist pattern in which the first photoresist layer covers the base substrate except for a source electrode region and a drain electrode region; forming a source electrode and a drain electrode in the source electrode region and the drain electrode region respectively; forming a second photoresist layer on the source electrode and the drain electrode; exposing the second photoresist layer using back exposure through the base substrate to form a second photoresist pattern; and etching the oxide semiconductor layer using the second photoresist pattern as a etch stop layer to form an active pattern.