Glass manufacturing – Processes – With chemically reactive treatment of glass preform
Patent
1981-05-18
1983-04-26
Fisher, Richard V.
Glass manufacturing
Processes
With chemically reactive treatment of glass preform
65 301, 65 32, 65 601, 65 604, 204130, 427 12, 427 38, 430330, C03C 1500, C03C 1700
Patent
active
RE0312207
ABSTRACT:
Glass photomasks having a stained pattern within the glass for use in photolithographic processes are made by exposing and developing a photoresist on a sheet of glass and subsequently migrating stain-producing ions, such as silver and/or copper, into the surface of the glass under the influence of an electric field and moderately elevated temperatures.
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Fisher Richard V.
Millman Dennis G.
PPG Industries Inc.
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