Patent ID: 7453124

Claim:
A field effect transistor, which is a metal-insulator-semiconductor field effect transistor having a fin section formed on a semiconductor substrate so as to protrude in a fin shape, comprising: a channel region section, a source region section, and a drain region section, which are formed at the fin section so that the channel region section is sandwiched by the source region section and the drain region section; the channel region being of the same conductivity type as the substrate, and physically and electrically in contact with the substrate; a gate dielectric thin film for coating the channel region section of the fin section; a gate electrode, insulated from the channel region section by the dielectric thin film, which is formed above the channel region section; and an insulating layer for covering a surface of the semiconductor substrate, wherein said fin section is formed so as to extend from the semiconductor substrate through the insulating layer and protrude outward from a surface of the insulating layer and wherein the source region section and the drain region section extend outwardly from the semiconductor substrate, are formed at the fin section sandwiched by the insulating layer, extend through the insulating layer and protrude from the surface of the insulating layer, and wherein said source region section and said drain region section are formed so as to extend across a surface region of the insulating layer.