Patent ID: 10141180

Abstract:
A silicon wafer is manufactured by subjecting a silicon wafer sliced from a silicon single-crystal ingot grown by the Czochralski process to a rapid thermal process in which the silicon wafer is heated to a maximum temperature within a range of 1300 to 1380° C., and kept at the maximum temperature for 5 to 60 seconds; and removing a surface layer of the wafer where a semiconductor device is to be manufactured by a thickness of not less X [μm] which is calculated according to the below equations (1) to (3): X [μm]=a [μm]+b [μm]  (1);a [μm]=(0.0031×(said maximum temperature) [° C.]−3.1)×6.4×(cooling rate)−0.4 [° C./second]  (2); andb [μm]=a/(solid solubility limit of oxygen) [atoms/cm3]/(oxygen concentration in substrate) [atoms/cm3]  (3).