Patent ID: 9631297
Date: 2017-04-25
CPC Classifications: C30B,H01L,Y10T

Claim:
1. A method of producing an epitaxial silicon wafer, wherein an epitaxial layer is formed on one surface of a silicon wafer with a chamfered end having a width of 200 μm or less, which surface has a surface orientation of the (100) plane or the (110) plane, wherein in the formation of the epitaxial layer, the PV value with respect to a surface of the epitaxial layer is controlled to 12.5 or less, the PV value being defined as a value found by dividing a value (nm) obtained by subtracting the minimum value of the average value of the ESFQR per crystal orientation with the edge exclusion zone being set to 1 mm from the maximum value thereof, by the film thickness (μm) of the epitaxial layer at the center portion of the silicon wafer.