Patent ID: 7355253

Claim:
A double-gate field effect transistor, comprising: a strained-silicon channel formed adjacent a source and a drain on a substrate, said strained-silicon channel comprising two separated portions, wherein each of said two separated portions of said strained-silicon channel connects said source and said drain; a first gate formed over a first vertical outer side of said strained-silicon channel; a second gate formed over a second vertical inner side of said strained-silicon channel located between said two separated portions of said strained-silicon channel; a first gate dielectric formed between said first gate and said strained-silicon channel; and a second gate dielectric formed between said second gate and said strained-silicon channel, wherein said strained-silicon channel is non-planar, said first gate comprises at least one chemical element not included in said second gate, said first gate dielectric is chemically different than said second gate dielectric.