Inventors:
Craig C. Ramsey - West Linn OR, US
Jeffrey K. Lassahn - Portland OR, US
Greg Huntzinger - West Linn OR, US
DelRae H. Gardner - Tualatin OR, US
Assignee:
CyberOptics Semiconductors, Inc. - Beaverton OR
International Classification:
G01B 11/26
G01B 11/14
G01C 1/00
G01N 21/86
G01V 8/00
G01R 31/26
H01L 21/66
G06K 9/00
US Classification:
356622, 356138, 35613903, 3561391, 356147, 356614, 25055929, 25055938, 382151, 438 16, 414935
Abstract:
A wireless substrate-like sensor is provided to facilitate alignment and calibration of semiconductor processing systems. The wireless substrate-like sensor includes an optical image acquisition system that acquires one or more images of targets placed within the semiconductor processing system. Analysis of images of the targets obtained by the wireless substrate-like sensor provides position and/or orientation information in at least three degrees of freedom. An additional target is affixed to a known location within the semiconductor processing system such that imaging the reference position with the wireless substrate-like sensor allows the measurement and compensation for pick-up errors.