Patent ID: 7482243

Claim:
A method of forming a thin channel MOSFET comprising: providing an SOI substrate having a buried insulating layer underlying an SOI layer; forming a pad stack including a pad layer atop said SOI layer; forming a dummy gate region atop said pad stack; providing a localized oxide region by ion implantation, wherein oxygen ions passing through said dummy gate region and said pad layer are implanted into a portion of said SOI layer, wherein oxygen ions are implanted into a portion of said buried insulating layer of said SOI substrate in areas that do not underlie said dummy gate region, and wherein said localized oxide region is located on top of and in contact with said buried insulating layer thereby thinning a portion of said SOI layer, said thinned portion of said SOI layer defining a channel; forming source/drain extension regions in said SOI layer abutting said thinned portion of said SOI layer; and replacing said dummy gate region with a gate region, wherein said localized oxide region is self-aligned with said gate region.