Patent ID: 9224831
Filing Date: 2015-12-29
Classification: H01L

Abstract:
1. A method of manufacturing an oxide semiconductor device, the method comprising: forming a gate electrode on a substrate; forming a gate insulating layer on the gate electrode; forming an active pattern on the gate insulating layer; forming a first mask pattern on the gate insulating layer and the active pattern; forming an insulating interlayer on the gate insulating layer, the active pattern, and the first mask pattern; forming a second mask pattern on the insulating interlayer, the second mask pattern comprising an opening that exposes a region where the first mask pattern is formed; forming contact holes exposing portions of the active pattern by patterning the insulating interlayer using the first mask pattern and the second mask pattern; removing the first mask pattern and the second mask pattern after patterning the insulating interlayer using the first mask pattern and the second mask pattern; and forming a source electrode and a drain electrode on the active pattern by filling the contact holes, the drain electrode spaced apart from the source electrode.