Patent ID: 8012592

Claim:
A semiconductor structure comprising: a silicon substrate; a first monocrystalline semiconductor layer disposed over the silicon substrate, wherein the first monocrystalline semiconductor layer has a lattice constant different from a lattice constant of relaxed silicon, and wherein the first monocrystalline semiconductor layer includes at least a germanium layer; an insulating layer disposed over the first monocrystalline semiconductor layer in a first region; a monocrystalline silicon layer disposed over the insulating layer in the first region; a second monocrystalline semiconductor layer disposed over at least a portion of the first monocrystalline semiconductor layer in a second region and absent from the first region, wherein the second monocrystalline semiconductor layer has a lattice constant different from the lattice constant of relaxed silicon; and a second insulating layer disposed over the silicon substrate and under the germanium layer.