Patent ID: 9650725
Date: 2017-05-16
CPC Classifications: C30B

Claim:
1. A method for manufacturing a silicon single crystal wafer, comprising: growing a silicon single crystal ingot with the use of a CZ single crystal manufacturing apparatus; and slicing out a silicon single crystal wafer from the grown silicon single crystal ingot, wherein, under a growth condition that V/G≧1.05×(V/G)crt is achieved where V is a growth rate in growth of the silicon single crystal ingot, G is a temperature gradient near a crystal growth interface, and (V/G)crt is a value of V/G when a dominant point defect changes from a vacancy to interstitial Si, a silicon single crystal ingot having oxygen concentration of 7×10 wherein, before growing the silicon single crystal ingot, a silicon single crystal ingot having oxygen concentration of 7×10