Patent ID: 8594975
Filing Date: 2013-11-26
Classification: G01B,H01L

Abstract:
1. A method utilizing a processor included in a computer system for characterizing an anomaly feature on a wafer, the method comprising the steps of: obtaining wafer surface measurement data yielding radial profile Z(r, θ) of sensed height information, within at least a sector in the near edge region of the wafer (edge roll off region); determining radial profile Z(r, θ) of sensed height information for the wafer along at least a radial line within the sector; obtaining a ZDD profile ZDD(r,θ)=d processing the ZDD profile and the ZDDD profile to produce a slope profile; determining an anomaly span metric from the slope profile; processing the ZDD profile and the ZDDD profile to produce a height profile; and determining an anomaly height metric from the height profile.