Patent ID: 7550370
Filing Date: 2009-06-23
Classification: H01L

Abstract:
1. A method of forming a strained Si layer on a SiGe-on-insulator (SGOI) structure with a low stacking fault defect density, the method comprising the steps of: providing a Si-on-insulator (SOI) substrate having an unstrained Si layer over an insulator; depositing a first SiGe layer on said Si layer; thermally mixing said first SiGe layer with said Si layer to transform said first SiGe layer and said Si layer into a relaxed SiGe layer of a first thickness; thinning said relaxed SiGe layer to a second thickness through an high-pressure oxidation (HIPOX) at temperature range of 550° C.-700° C. and pressure range of 5 ATM-20 ATM; and depositing a strained Si layer on said relaxed SiGe layer.