Patent ID: 9368415
Filing Date: 2016-06-14
CPC Classification: B82Y,G01Q,H01L

Claim Text:
1. A non-destructive method of measuring crystal defects in a semiconductor structure, said method comprising: providing a semiconductor material stack of, from bottom to top, a first semiconductor material having a first lattice constant and a second semiconductor material having a second lattice constant that may or may not differ from said first lattice constant and is selected from an III-V compound semiconductor and germanium, wherein the second semiconductor material have a thickness that is from 5 nm to 5000 nm; scanning a topmost surface of said second semiconductor material using atomic force microscope (AFM) operating in a tapping mode to measure crystal defects that intersect said topmost surface of said second semiconductor material and to provide an image of said topmost surface of said second semiconductor material; and calculating a density of said crystal defects that intersect said topmost surface of said second semiconductor material.