Patent ID: 9702829
Date: 2017-07-11
CPC Classifications: G01B,G01N

Claim:
1. A method for inspecting a wafer, comprising: measuring a set of intensity frames of at least one portion of a surface of the wafer utilizing at least one phase-shifting interferogram detector of a wafer inspection system; extracting an amplitude map of said at least one portion of the surface of the wafer based on said set of intensity frames with a wafer surface feature detection module executed by an interferometer system; performing wafer defect detection based on the amplitude map with the wafer surface feature detection module executed by the interferometer system; quantifying at least one of: a shape, a height, a depth, an area and a volume of a detected defect of the wafer; and reporting data regarding the detected defect of the wafer and said at least one of: the shape, the height, the depth, the area and the volume of the detected defect of the wafer.