Patent ID: 7033962

Claim:
A method for manufacturing a silicon wafer wherein the silicon wafer having grown-in precipitation nuclei generated in a growth step of a silicon single crystal is subjected to heat treatment to impart a gettering capability thereto, comprising at least the following three steps of: a temperature raising step A 1 for growing the grown-in precipitation nuclei; a temperature raising step B 1 for further raising a temperature of the silicon wafer to a keeping temperature higher than that in the temperature raising step A 1 ; and a constant temperature keeping step C 1 for growing the grown-in precipitation nuclei into oxide precipitates each of a size equal to or larger than one having a gettering capability and for out-diffusing oxygen in the vicinity of a surface of the silicon wafer, wherein the temperature raising step A 1 is a step for raising a temperature of the silicon wafer from T 6 ° C. to T 7 ° C. at a rate of R 3 ° C./min, wherein the T 6 ° C. is 700° C. or lower, the T 7 ° C. is 800° C. to 1000° C. and the R 3 ° C./min is 3° C./min or less.