Patent ID: 8138559

Claim:
A semiconductor structure comprising: a semiconductor substrate; a gate dielectric on a surface of the semiconductor substrate; a gate electrode on the gate dielectric; a source/drain region adjacent and horizontally spaced apart from the gate electrode; a recess in the semiconductor substrate and filled with a dielectric material, wherein the recess is between the gate electrode and the source/drain region, wherein the recess is horizontally spaced apart from the gate electrode, and wherein the recess and the source/drain region are not vertically overlapped, and are physically separated from each other; and a lightly doped source/drain region having a lower impurity concentration than the source/drain region, wherein the lightly doped region is of a same conductivity type as the source/drain region and has an edge substantially aligned with an edge of the gate electrode, and wherein the recess and the source/drain region are in the lightly doped source/drain region.