Patent ID: 7705400

Claim:
A semiconductor device having a MIS-type field effect transistor comprising: a first semiconductor film; source/drain regions formed so as to be separated from each other by the first semiconductor film; a gate insulating film formed on the first semiconductor film between the source/drain regions; and a gate electrode formed on the gate insulating film, the first semiconductor film including: a host semiconductor having component atoms so bonded as to form a tetrahedral bonding structure; impurity atoms S for substituting the component atoms of sites of lattice points of the host semiconductor and the impurity atoms S being made to have a valance electron agreeing with that of the component atoms of the host semiconductor; and impurity atoms I to be inserted into interstitial sites of the host semiconductor, the impurity atoms I being bonded to the impurity atoms S and the impurity atoms I being in a state of showing an electronic arrangement of a closed shell structure.