Patent ID: 6793731
Filing Date: 2004-09-21
Classification: C30B,H01L

Abstract:
A method for forming a single-crystal silicon germanium film on a silicon substrate, the method comprising:providing a silicon (Si) substrate with a top surface; growing a graded layer of strained single-crystal Si1âˆ’xGex having a bottom surface overlying the Si substrate top surface, and a top surface, where x increases with the Si1âˆ’xGex layer thickness; implanting hydrogen ions; implanting heavy ions into the Si1âˆ’xGex; in response to the heavy ion implantation amorphizing a first region of the Si1âˆ’xGex layer adjacent the Si substrate; annealing; and, in response to the annealing, forming a relaxed single-crystal Si1âˆ’xGex region, free of defects.