Stock material or miscellaneous articles – All metal or with adjacent metals – Having composition – density – or hardness gradient
Patent
1992-06-30
1995-07-11
Kiliman, L.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having composition, density, or hardness gradient
428332, 428336, 428611, 428678, 428694T, 428694TS, 428694TM, 428900, G11B 566, B32B 514
Patent
active
054320127
ABSTRACT:
A magnetic thin-film media with high coercivity and low noise characteristics is disclosed. The medium has a gradient-composition thin-film magnetic layer in which a lowermost stratum is composed of a first alloy, preferably, having relatively low noise and low magnetic remanence characteristics, and an uppermost stratum composed of a second alloy having relatively high noise and high magnetic remanence characteristics. The medium is characterized by a coercivity which is substantially greater, and a media noise which is substantially less than that of a similar medium whose magnetic thin-film layer is composed of either the first or second alloy alone. Also disclosed is a method of producing such a medium.
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Lal Brij B.
Shinohara Tadashi
Dehlinger Peter J.
HMT Technology Corporation
Kiliman L.
Mohr Judy M.
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