Patent ID: 9460971
Filing Date: 2016-10-04
CPC Classification: H01L

Claim Text:
1. A method for forming differently strained regions of semiconductor on a substrate, the method comprising: forming a first semiconductor layer over a second semiconductor layer, wherein the first semiconductor layer forms under a first strain; implanting ions into a first region and not a second region of the second semiconductor layer, wherein the implanted ions amorphize the first region of the second semiconductor layer; recrystallizing the first region of the second semiconductor layer to form a second strain in the first region; removing the first semiconductor layer; forming a third semiconductor layer in contact with the second region and not in contact with the first region, wherein the third semiconductor layer is of a different chemical composition from the second semiconductor layer; and heating the substrate to condense a chemical component from the third semiconductor layer into the second region of the second semiconductor layer to form a third strain in the second region that is different from the second strain.