Virginia Semiconductor, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6554687 Precise crystallographic-orientation alignment mark for a semiconductor waferExpiredSep 27, 01Apr 29, 03[B24C]
6428618 Method for forming a solid solution alloy crystalExpiredFeb 09, 01Aug 06, 02[C30B]
6390889 Holding strip for a semiconductor ingotExpiredSep 29, 99May 21, 02[B24B]
6367467 Holding unit for semiconductor wafer sawingExpiredJun 18, 99Apr 09, 02[B28D]
6251181 Method for forming a solid solution alloy crystalExpiredJun 18, 99Jun 26, 01[C30B]
6159285 Converting <100> and <111> ingots to <110> ingotsExpiredMay 06, 99Dec 12, 00[B24B]
6080042 Flatness and throughput of single side polishing of wafersExpiredOct 31, 97Jun 27, 00[B24B]
6057924 Optical system for measuring and inspecting partially transparent substratesExpiredSep 04, 98May 02, 00[G01B]
5959731 Optical micrometer for measuring thickness of transparent substrates based on optical absorptionExpiredOct 29, 97Sep 28, 99[G01B]
5843832 Method of formation of thin bonded ultra-thin wafersExpiredMar 01, 95Dec 01, 98[H01L]
5754294 Optical micrometer for measuring thickness of transparent wafersExpiredMay 03, 96May 19, 98[G01B]

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