Patent ID: 7648868

Claim:
A method for fabricating a metal-oxide semiconductor device, comprising the steps of: providing a wafer having a buried oxide layer between a first semiconductor layer and a second semiconductor layer, wherein the buried oxide layer is configured, in its entirety, to be silicon-rich; implanting one or more oxygen getterer species into the buried oxide layer, wherein the oxygen getterer species implant is peaked inside a top portion of the buried oxide layer adjacent to the first semiconductor layer; forming a well region in the first semiconductor layer; forming an interfacial oxide layer over the well region; forming a gate stack over the interfacial oxide layer; forming a first raised source/drain region and a second raised source/drain region adjacent to opposite sides of the gate stack; and forming a first source/drain extension region that extends the first raised source/drain region to the well region and a second source/drain extension region that extends the second raised source/drain region to the well region.