Patent ID: 8298926

Claim:
A method for manufacturing a silicon wafer, comprising: preparing a wafer having a front surface, a rear surface and a rim edge connecting the front and rear surfaces; generating embryos, which become oxygen precipitates by succeeding annealing, in the silicon wafer; stabilizing the embryos generated in the silicon wafer; and removing defects and the embryos existing within a predetermined depth from the front and rear surfaces of the silicon wafer, after the step of stabilizing the embryos, wherein the step of generating embryos is conducted in a way of thermally annealing the silicon wafer at a first temperature, wherein the step of stabilizing the embryos is conducted in a way of thermally annealing the silicon wafer with the embryos at a second temperature, wherein the step of removing defects and the embryos is conducted in a way of thermally annealing the silicon wafer at a third temperature higher than the first temperature, and wherein the thermal annealing executed at the first temperature and the thermal annealing executed at the second temperature are conducted for 1 to several ten seconds, respectively.