Patent ID: 7465958

Claim:
A transistor comprising: a first semiconductor island; a second semiconductor island; a first gate electrode over the first semiconductor island with an insulating film interposed therebetween; and a second gate electrode over the second semiconductor island with the insulating film interposed therebetween, wherein the first semiconductor island comprises a first source region, a first drain region, a first channel region between the first source region and the first drain region, wherein the second semiconductor island comprises a second source region, a second drain region, a second channel region between the second source region and the second drain region, wherein the first source region and the second source region are electrically connected to each other, wherein the first drain region and the second drain region are electrically connected to each other, wherein a first current flow direction through the first channel region of the first semiconductor island is opposite to a second current flow direction through the second channel region of the second semiconductor island, wherein each of the first gate electrode and the second gate electrode comprises a first layer and a second layer.