Patent ID: 7250351

Claim:
A method of forming an enhanced silicon-on-insulator (SOI) transistor, comprising the steps of: providing a thin buried oxide (BOX) layer disposed on a substrate under SOI active transistor region including a device channel; forming a shallow trench isolation (STI) region over said thin buried oxide (BOX) layer around said SOI active transistor region; providing oxygen implants in said substrate under said thin buried oxide (BOX) layer and vertically spaced below SOI source/drain regions to be used for forming source and drain of the SOI transistor; processing said oxygen implants for providing a thick self-aligned buried oxide (BOX) region under said thin buried oxide (BOX) layer and vertically spaced below said SOI source/drain regions; and forming a diffusion layer defining said source and drain in said SOI source/drain regions and generating a selective strain in the source/drain regions to provide enhanced carrier mobility for either a P-channel device or an N-channel device.