Patent ID: 8008654

Claim:
The thin-film transistor device comprising: an n-type TFT; and a p-type TFT; wherein a semiconductor film for forming a channel is made of the same material for both the n-type TFT and the p-type TFT; source and drain electrodes in the n-type TFT and the p-type TFT are made of the same material; and either one or both of the n-type TFT and the p-type TFT have a first polarizable thin film on an interface between a gate insulator and a semiconductor and also have a second polarizable thin film on an interface between the source and drain electrodes and the semiconductor film, wherein the polarizable thin films are provided so that orientations and/or difference in potential of dipole vectors generated due to polarization are different in the n-type TFT and p-type TFT.