Patent ID: 9064788
Filing Date: 2015-06-23
Classification: G05B,H01L,Y02P

Abstract:
1. A method for monitoring a manufacturing operation, said method comprising: performing multiple runs of a processing operation upon semiconductor substrates over time, said processing operation having a measurable impact on a characteristic of said semiconductor substrate; measuring said characteristic at a plurality of sites on said corresponding semiconductor substrate for each said run; identifying an outlier site of said plurality of sites wherein said measured characteristic has the largest or smallest average value over said runs; generating a comparative index comparing a value of said measured characteristics of said outlier site to a value of said measured characteristics of other sites of said plurality of sites, for each said run; performing further runs of said processing operation and measuring said characteristic at said outlier site and at said other sites for each said further run; and generating said comparative index for each said further run and monitoring said comparative index in time; and controlling said processing operation by adjusting a parameter thereof based on changes in said comparative index.