Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making named article
Patent
1994-01-11
1995-07-04
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making named article
430296, 430314, 430316, 430323, 430324, 430942, G03C 500
Patent
active
054299110
ABSTRACT:
A method of manufacturing a medium having a magnetic pattern, comprises the steps of forming a first groove in a substrate by photoetching, and forming in the first groove or in a portion of the substrate adjacent to the first groove by the photoetching a second groove of different depth than the first groove. The first and second grooves are then filled with a ferromagnetic substance so that the ferromagnetic substance in the first groove is different in thickness from the ferromagnetic substance in the second groove. The ferromagnetic substance is then magnetized to produce magnetic field intensity distribution based on the thickness of the magnetized ferromagnetic substance.
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Togawa Masayuki
Toyama Kiyoshi
Bowers Jr. Charles L.
Pasterczyk J.
Teijin Seiki Co. Ltd.
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