Patent ID: 8231430

Claim:
A method for producing a wafer at least comprising: a slicing step of slicing an ingot to obtain a wafer, a chamfering step of chamfering the wafer sliced from the ingot using a grindstone for chamfering, a step of obtaining a product wafer thinner than the chamfered wafer by performing a flattening process on the chamfered wafer, a correction step comprising: chamfering a dummy wafer equivalent in thickness to a predetermined standard thickness of the product wafer, measuring chamfered portions of the chamfered dummy wafer, and correcting the shape of the grindstone for chamfering based on the measured chamfered portions of the chamfered dummy wafer, at least before the chamfering step of chamfering the wafer sliced from the ingot, thereby chamfering the wafer sliced from the ingot using the grindstone for chamfering having its shape corrected, wherein at least after the correction step, the grindstone for chamfering having its shape corrected is used to chamfer a dummy wafer equivalent in thickness to the wafer sliced from the ingot, dimensions of chamfered portions of the chamfered dummy wafer are measured, and dimensions of the measured chamfered portions of the dummy wafer are set as intended chamfer values for the wafer sliced from the ingot.