Browse Prior Art Database

Spatial Filtering System for Inspection and Verification

IP.com Disclosure Number: IPCOM000036829D
Original Publication Date: 1989-Nov-01
Included in the Prior Art Database: 2005-Jan-29

Publishing Venue

IBM

Related People

Authors:
Watts, KW [+details]

Abstract

A technique is described whereby an optical spatial filtering system is used in the inspection and verification of via hole patterns, as used in printed circuitry, to: a) detect the presence or absence of holes, b) accurately gauge the size of each hole, and c) determine if the hole is contaminated or defective.