Patent ID: 8759186

Claim:
A method for manufacturing a semiconductor device, comprising: sequentially forming a metal oxide semiconductor layer and a first insulating layer on a substrate; forming a gate on the first insulating layer; patterning the insulating layer by using the gate as an etching mask, so as to expose the metal oxide semiconductor layer on two sides of the gate to serve as a source region and a drain region; forming a dielectric layer to cover the gate and the metal oxide semiconductor layer, wherein the dielectric layer composes at least one of hydrogen group and hydroxyl group; performing a heating treatment, so that the at least one of hydrogen group and hydroxyl group in the dielectric layer reacts with the source region and the drain region, wherein a temperature of the heating treatment is between 100° C. and 500° C.; and forming a source electrode and a drain electrode, wherein the source electrode and the drain electrode are electrically connected to the source region and the drain region respectively.