Patent ID: 7344962

Claim:
A method of forming a semiconductor structure, said method comprising: forming a trench in a multi-layer stack through a semiconductor layer and an insulating layer to a silicon substrate, wherein said silicon substrate has a first crystalline orientation and wherein said semiconductor layer has a second crystalline orientation; filling said trench with a silicon material, wherein said silicon material comprises one of amorphous silicon and poly-crystalline silicon and wherein said silicon material is in contact with said silicon substrate; after said filling of said trench, forming isolation structures on said sidewalls of said trench; amorphizing said silicon material; heating said silicon material such that said silicon material recrystallizes with said first crystalline orientation and said semiconductor layer remains in said second crystalline orientation; and before said amorphizing of said silicon material, forming additional isolation structures within said silicon material in said trench and within said semiconductor layer outside said trench.