Patent ID: 7403023
Filing Date: 2008-07-22
Classification: G01R,H01L

Abstract:
1. A method of measuring defects in an ion implanted semiconductor wafer, the method comprising the steps of: a) heating the wafer to a treatment temperature for a treatment time to substantially stabilize interstitial defect migration while leaving vacancy defects substantially unaltered; b) conveying the wafer such that a surface of the wafer is substantially parallel to a surface photovoltage electrode of a head assembly; c) exposing at least a portion of the wafer to light having a wavelength and having an intensity; d) detecting with the surface photovoltage electrode a photovoltage induced at the surface of the wafer in response to the modulated light intensity; and e) calculating an electrical property of the wafer from the photovoltage induced at the surface of the wafer.