Patent ID: 7256464
Filing Date: 2007-08-14
Classification: H01L

Abstract:
1. A metal oxide semiconductor (MOS) transistor structure, comprising: a first doping type semiconductor substrate having a plurality of trenches that partition the first doping type semiconductor substrate into a plurality of first doping type semiconductor strips; a masking layer disposed on the first doping type semiconductor substrate; an isolation layer disposed in the trenches, wherein the surface of the isolation layer is below the upper surface of the first doping type semiconductor strips; a plurality of gates disposed over the first doping type semiconductor strips and set in a direction perpendicular to the first doping type semiconductor strips; a gate oxide layer disposed between the sidewalls of the first doping type semiconductor strips and the gates; a plurality of spacers disposed on the sidewalls of the gates and the first doping type semiconductor strips; and a plurality of second doping type source/drain regions disposed in the first doping type semiconductor strips on each side of the gates.