Patent ID: 9482519
Filing Date: 2016-11-01
CPC Classification: G01B,G01N,H01L

Claim Text:
1. A method of measuring an average characteristic of features on a semiconductor structure comprising: projecting a light beam onto the features in a first area; collecting a first reflected light beam from the first area, wherein the first reflected light beam is the projected light beam after it has reflected off the features in the first area; converting the first reflected light beam into first data; projecting the light beam onto the features in a second area, wherein the second area overlaps with the first area by at least one individual feature; collecting a second reflected light beam from the second area, wherein the second reflected light beam is the projected light beam after it has reflected off the features in the second area; converting the second reflected light beam into second data; performing analysis of the first data and second data to determine an overall average value; comparing the overall average value to a predetermined desired value; and discarding the semiconductor structure if the overall value differs from the desired value by a predetermined amount.