Patent ID: 8426851
Filing Date: 2013-04-23
Classification: H01L

Abstract:
1. A thin film transistor comprising: a gate insulating film between an oxide semiconductor layer and a gate electrode, said gate electrode being between said gate insulating film and a substrate; a source/drain electrode in physical contact with a source/drain region of the oxide semiconductor layer and said gate insulating film, said source/drain region being between said gate insulating film and said source/drain electrode; a channel protective film between said source/drain electrode and a different source/drain electrode, a channel region of the oxide semiconductor layer being between said gate insulating film and said channel protective film, wherein said channel protective film comprises a second protective film between a first protective film and a third protective film, said second protective film being in physical contact with said first protective film and said third protective film, wherein said first protective film is in physical contact with said oxide semiconductor layer, said second protective film being in physical contact with said gate insulating film, wherein along every direction within a plan view of a layout, a boundary of the source/drain electrode extends beyond a boundary of the source/drain region.