Patent ID: 6709909
Filing Date: 2004-03-23
Classification: H01L,Y10S

Abstract:
A method of manufacturing a semiconductor device, comprising:forming a first SiGe layer on a substrate; forming an oxide layer by implanting oxygen ions into the first SiGe layer and annealing the substrate; forming, on the first SiGe layer, a second SiGe layer which has a higher content of Ge than the first SiGe layer; forming a strained Si layer on the second SiGe layer; and forming a field effect transistor in which the strained Si layer is used as a channel region of the field effect transistor, wherein a content of Ge in the first SiGe layer is not lower than 1 atomic % and not higher than 20 atomic %, and wherein the content of Ge in the second SiGe layer is higher than a content of Ge in the first SiGe layer and is not higher than 90 atomic %.