Patent ID: 8765492

Claim:
A method of manufacturing a silicon wafer that is subjected to a flash lamp annealing process, the method comprising the steps of: preparing a wafer, in which a single crystal silicon ingot is sliced to obtain a silicon wafer and a surface of the silicon wafer is surface-treated; setting stress, in which the stress S (MPa) subjected on the wafer prepared in the step of preparing a the wafer during the flash lamp annealing process is set before the flash lamp annealing process; inspecting, in which a defect on a front or back surface of the wafer is inspected; and determining, in which the wafer is evaluated if the wafer satisfies a criterion indicated by a formula (A) below, and a wafer satisfying the criterion is sorted out as a qualified wafer and a wafer not satisfying the criterion as an unqualified wafer, wherein the flash lamp annealing process is performed in a condition where a temperature is from 1100° C. to the melting point of silicon and a lapse time is from lμ second to 100 m seconds; Stress S×Size of defect C 3500 (MPa·μm) (A) C: Size of defect on the front or back side surface of the silicon wafer (μm).