Patent ID: 6072320
Filing Date: 2000-06-06
Classification: G01R

Abstract:
A method for measuring junction leakage in a semiconductor product wafer having a first type junction and a second type junction, said method comprising:applying varying light to said wafer;measuring a surface photovoltage characteristic for said wafer in response to said light, said surface photovoltage characteristic being indicative of a junction leakage characteristic of a set of one or more of said type functions;inducing eddy currents in said wafer;measuring an eddy current characteristic for said wafer in response to said induced eddy currents and said light, said eddy current characteristic being indicative of a different set of one or more of said type junctions; anddetermining a junction leakage characteristic for at least one of said type junctions from said surface photovoltage and said eddy current characteristics.