Patent ID: 7531393

Claim:
A method comprising: providing a silicon film on an insulating substrate; growing a silicon germanium film on a silicon substrate; bonding the silicon germanium film to the silicon film of said insulating substrate; removing a portion of said silicon substrate so as to leave a layer of silicon from said silicon substrate on said silicon germanium film on said insulating wafer; annealing said insulating substrate so as to diffuse germanium from said silicon germanium film into said silicon film on said insulating substrate and into said layer of silicon from said silicon substrate so as to form a relaxed silicon germanium film from said silicon film on said insulating substrate, said silicon germanium film and said layer of silicon from said silicon substrate; forming a fin having a top surface and two sidewalls from said relaxed said silicon germanium film; forming a strained silicon layer on said top surface and said sidewalls of said fin; forming a gate dielectric layer on said strained silicon layer; and forming a gate electrode on said gate dielectric.