Stock material or miscellaneous articles – All metal or with adjacent metals – Having magnetic properties – or preformed fiber orientation...
Reexamination Certificate
2005-04-19
2005-04-19
Bernatz, Kevin M. (Department: 1773)
Stock material or miscellaneous articles
All metal or with adjacent metals
Having magnetic properties, or preformed fiber orientation...
C428S668000, C428S686000, C428S213000, C428S336000, C428S690000, C360S131000
Reexamination Certificate
active
06881496
ABSTRACT:
A magnetic recording medium has first, second and third magnetic layers having magnetization directions which are alternately antiparallel in a state where no external magnetic field is applied on the magnetic recording medium, with a first nonmagnetic layer interposed between the first and second magnetic layers and a second nonmagnetic layer interposed between the second and third magnetic layers. A relationship Ms2×t2<(Ms1×t1+Ms3×t3) stands, where Ms1, Ms2and Ms3, and t1, t2and t2respectively denote saturation magnetizations and thicknesses of the first, second and third magnetic layers.
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Bernatz Kevin M.
Fujitsu Limited
Greer Burns & Crain Ltd.
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