Patent ID: 7282425

Claim:
A method of fabricating a semiconductor substrate comprising the steps of: forming a compound semiconductor substrate having a bulk material, a first layer on top of the bulk material and a second layer on top of the first layer formed of the bulk material; forming a third layer of a non-crystalline material on top of the second layer; removing a portion of the third layer and the second layer down to the first layer; epitaxially growing an elemental semiconductor layer on the first layer adjacent to a remaining portion of the second layer, such that a height of the elemental semiconductor layer is substantially the same as the remaining portion of the second layer; removing the third layer; forming an insulating layer over the second layer and the elemental semiconductor layer to form a first substrate; and wafer bonding the first substrate onto a monocrystalline substrate, such that the insulating layer bonds to the monocrystalline substrate.