Patent ID: 7563319

Claim:
A manufacturing method of a silicon wafer not including COP comprising: preparing a silicon single crystal by the Czochralski method, slicing a first silicon wafer from said silicon single crystal to obtain a silicon wafer including COP, heat-treating said silicon wafer including COP in an oxidizing atmosphere to obtain the silicon wafer not including COP, wherein assuming that a temperature at which said heat treatment is carried out in said oxidizing atmosphere is denoted as T (° C.) and an interstitial oxygen concentration in said silicon water including COP is denoted as [Oi](atoms/cm 3 ), said manufacturing method of the silicon wafer characterized in that a relation between said temperature T and said interstitial oxygen concentration [Oi] satisfies the following formula: [ Oi]≦ 2.123×10 21 exp(−1.035 /k ( T+ 273)), where, said interstitial oxygen concentration in said silicon wafer including COP is a value measured in accordance with FT-IR method (ASTM F-121, 1979) and the k is the Boltzmann's constant, 8.617×10 −5 (eV/K).