Patent ID: 6452678
Filing Date: 2002-09-17
Classification: G01B

Abstract:
A method for non-destructively evaluating opaque material surface characteristics with an electromagnetic radiation-intensity measuring device during semiconductor manufacturing, comprising:providing a calibration matrix of reflectance data, including UV radiation reflectance data, said data being correlated with surface characteristics of control samples of an opaque material, wherein the reflectances have been taken at at least one angle of reflection, at a plurality of UV wavelengths within a UV wavelength range, and for at least one control sample; measuring reflectance for a test sample of the opaque material at the same at least one angle of reflection and at a plurality of UV wavelengths within said UV wavelength range, thus obtaining test sample reflectance data, wherein the opaque material test sample is part of an electronic device component, and said measuring is performed during manufacturing of said electronic device; and comparing the calibration matrix reflectance data with the test sample reflectance data for ascertaining surface characteristics of said test sample.