Patent ID: 7279742

Claim:
A transistor structure, comprising: a semiconductor substrate having a top surface and sidewalls extending downward from the top surface; two source/drain regions formed into the top surface of the semiconductor substrate; a recess structure formed into the top surface of the semiconductor substrate between the two source/drain regions and extending further into the semiconductor substrate than the two source/drain regions such that a lower edge of the recess structure is below lower edges of the two source/drain regions; an active zone comprising the two source/drain regions and a body region in the semiconductor substrate lying below the first and second source/drain regions and the recess structure; and a gate electrode including at least a first section arranged along a first of the sidewalls of the semiconductor substrate at least between the two source/drain regions, the first section of the gate electrode extending downward from the lower edges of the two source/drain regions to beyond the lower edge of the recess structure, wherein the body region provides a conductive channel between the two source/drain regions, which is controllable by a potential at the gate electrode.