Browse Prior Art Database

Layered Prism

IP.com Disclosure Number: IPCOM000067901D
Original Publication Date: 1979-Oct-01
Included in the Prior Art Database: 2005-Feb-20

Publishing Venue

IBM

Related People

Authors:
Yakubowski, C [+details]

Abstract

This optical device combines an upper image 5 and a lower image 6 on a screen 10 for the purpose of testing masks used in semiconductor manufacturing.