Patent ID: 7274070

Claim:
A complementary thin film transistor circuit, comprising: a substrate; a first thin film transistor that is formed on the substrate, the first thin film transistor including a first semiconductor film, a first gate electrode, and a first gate insulating film disposed between the first semiconductor film and the first gate electrode, the first semiconductor film including a first source region, a first drain region and a first channel region, the first thin film transistor being a first-conductivity-type thin film transistor; and a second thin film transistor that is formed on the substrate, the second thin film transistor including a second semiconductor film, a second gate electrode, a second gate insulating film disposed between the second semiconductor film and the second gate electrode, the second semiconductor film including a second source region, a second drain region, and a second channel region, the second thin film transistor being a second-conductivity-type thin film transistor, the first drain region and the second drain region being in contact with each other, and the first source region and the second source region being in contact with each other, the first channel region and the second channel region being formed in a same crystal grain.