Patent ID: 6238487
Filing Date: 2001-05-29
Classification: H01L,Y10S,Y10T

Abstract:
A method for improving the efficiency of the production of semiconductor chips,wherein said semiconductor chips have a surface, andwherein said surface of said semiconductor chips has impurities on it, andwherein said impurities comprise fluorescent impurities and non-fluorescent impurities, andwherein the identity of said impurities can be obtained by using a fluorometer to measure the fluorescence of the impurity; said method comprising the steps of:a) cleaning the semiconductor chip by a rinsing process to remove impurities from the surface of the chip with an aqueous rinse solution;b) monitoring said rinse solution fluorometrically to obtain a fluorometric reading for fluorescent impurities;c) determining from said fluorometric reading the identity of said impurities; andd) adjusting said production accordingly to decrease said impurities.