Patent ID: 6780238
Filing Date: 2004-08-24
Classification: C30B,H01L,Y10S,Y10T

Abstract:
A method of manufacturing a silicon wafer, comprising:performing a Rapid Thermal Annealing (RTA) process on a silicon wafer having a top surface and a bottom surface in an atmosphere of a gas mixture comprising a gas which has a vacancy injection effect and a gas which has an interstitial silicon injection effect on the top and bottom surfaces of the silicon wafer, and at between about 1100Â° C. and about 1150Â° C., to generate nucleation centers, which serve as oxygen precipitate growth sites during subsequent heat treatment, in a nucleation center concentration profile from the top surface to the bottom surface of the wafer, the nucleation center concentration profile comprising: first and second peaks at first and second predetermined depths from the top and bottom surfaces of the wafer, respectively; a region having a predetermined nucleation center concentration, which is lower than a critical concentration, between the top surface of the wafer and the first peak and between the bottom surface of the wafer and the second peak; and a concave region between the first and second peaks.