Patent ID: 8004029

Claim:
A spin transistor, comprising: a non-magnetic semiconductor substrate having a channel region, a first area, and a second area, a surface of the non-magnetic semiconductor substrate including surfaces of the channel region and the first and second areas, and the channel region being between the first area and the second area; a first tunnel barrier film located on the first area; a first conductive layer located on the first tunnel barrier and made of a ferromagnetic material magnetized in a first direction; a second conductive layer located above the second area and made of a ferromagnetic material magnetized in one of the first direction and a second direction that is antiparallel with respect to the first direction, electron spins being passed between the first conductive layer and the second conductive layer through the first tunnel barrier and the channel region; an insulating film located on the channel region; and a gate electrode located on the insulating film.