Patent ID: 8896032

Claim:
A semiconductor structure for sensing biomolecules, said semiconductor structure comprising: a semiconductor substrate having a V-shaped opening that extends only partially through said semiconductor substrate and exposes semiconductor material surfaces of the semiconductor substrate that are located beneath an uppermost surface of the semiconductor substrate; a source region located in a portion of the uppermost surface of the semiconductor substrate and positioned adjacent one side of the V-shaped opening; a drain region located in another portion of the uppermost surface of the semiconductor substrate and positioned adjacent an opposite side of the V-shaped opening; and a gate dielectric having an entirely bare uppermost surface and being continuously present in said V-shaped opening, wherein said gate dielectric has a bottommost surface portion in direct physical contact with said exposed semiconductor material surfaces of the semiconductor substrate and another bottommost surface portion in direct physical contact with sidewall surfaces, but not topmost surfaces, of both said source region and said drain region.