Patent ID: 8546180
Filing Date: 2013-10-01
Classification: G02F,H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising the steps of: forming a gate electrode layer over an insulating surface; forming a gate insulating layer over the gate electrode layer; forming an oxide semiconductor layer over the gate insulating layer; dehydrating or dehydrogenating the oxide semiconductor layer; forming an oxide insulating layer which is in contact with part of the oxide semiconductor layer and covering a periphery and a side surface of the oxide semiconductor layer; forming a source electrode layer and a drain electrode layer over the oxide insulating layer; and forming a protective insulating layer which is in contact with the oxide insulating layer, the source electrode layer, the drain electrode layer, and the oxide semiconductor layer, wherein the oxide semiconductor layer is prevented from being exposed to air between the step of dehydrating or dehydrogenating the oxide semiconductor layer and the step of forming the oxide insulating layer, so as to prevent water or hydrogen contamination.