Patent ID: 7473972

Claim:
A thin film transistor substrate comprising: a thin film transistor of a first channel conductivity type; and a thin film transistor of a second channel conductivity type, wherein in the thin film transistors, an opening is provided in a gate electrode opposed to a channel region with a gate insulating film interposed therebetween, the opening is formed in at least a part of the gate electrode over a tapered portion in an edge of the channel region, an impurity region of a same type as a source/drain region of the thin film transistor of the second channel conductivity type is formed in a channel region corresponding to the opening in the thin film transistor of the first channel type, and an impurity region of a same type as a source/drain region of the thin film transistor of the first channel conductivity type is formed in a channel region corresponding to the opening in the thin film transistor of the second channel type.