Patent ID: 7634325
Filing Date: 2009-12-15
Classification: G01N,H01L

Abstract:
1. A method of monitoring uniformity of a wafer comprising: selecting a wafer parameter; collecting manufacturing data including a measurement of the wafer parameter for a first wafer and a second wafer, wherein the first wafer and the second wafer are associated with a product type and were processed by a processing tool; determining an average offset profile of the wafer parameter for the first wafer and the second wafer using the collected manufacturing data wherein the average offset profile includes an average offset from a mean value of the selected wafer parameter at a plurality of locations on the first wafer and the second wafer; and predicting an offset profile for a third wafer associated with the product type and processed by the processing tool using the determined average offset profile, wherein a computer comprising a recordable medium on which is stored instructions for at least one routine performs the determining the average offset profile and the predicting the offset profile.