Patent ID: 7767548
Filing Date: 2010-08-03
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor wafer, comprising: (a) forming a SiGe mixed crystal layer and a first Si layer in this order on a surface of a silicon wafer; (b) forming a SiO (c) forming a layered product by stacking the silicon wafer and the support wafer with the SiO (d) forming a second Si layer by thinning the silicon wafer of the layered product to a predetermined thickness; (e) implanting hydrogen ions, rare gas ions, or both hydrogen ions and rare gas ions, to form ionic concentration peaks in an area which includes an interface between the first Si layer and the SiO (f) carrying out a first heat treatment by maintaining the layered product in an inert gas atmosphere containing nitrogen or Argon gas at 450 to 600° C. for 15 to 600 minutes; and (g) carrying out a second heat treatment following the first heat treatment, by maintaining the layered product at 800 to 1000° C. for 15 to 300 minutes, thereby relaxing the SiGe mixed crystal layer and diffusing Ge through portions of the first Si layer and the second Si layer.