Patent ID: 8551246

Claim:
A method for manufacturing a silicon single crystal wafer, comprising at least: a step of preparing a silicon single crystal ingot; a step of slicing the silicon single crystal ingot to fabricate a plurality of sliced substrates; a processing step of processing the plurality of sliced substrates into a plurality of substrates by performing at least one of lapping, etching, and polishing; a step of sampling at least one from the plurality of substrates; a step of measuring surface roughness of the substrate sampled at the sampling step by an AFM and obtaining an amplitude (an intensity) of a frequency band corresponding to a wavelength of 20 nm to 50 nm to make a judgment of acceptance; and a step of sending the substrate to the next step if a judgment result is acceptance or performing reprocessing if the judgment result is rejection; wherein the judgment of acceptance result is acceptance if a relationship of y<0.00096e −15× is met or the judgment of acceptance result is rejection if the relationship is not met, where X (nm −1 ) is a frequency and y (nm 2 ) is the amplitude (the intensity) when a waveform of a measurement value obtained by measuring the surface roughness by using the AFM is subjected to Fourier transformation.