Stock material or miscellaneous articles – Magnetic recording component or stock – Thin film media
Reexamination Certificate
2008-07-05
2011-12-06
Rickman, Holly (Department: 1785)
Stock material or miscellaneous articles
Magnetic recording component or stock
Thin film media
C428S827000, C428S828000, C428S829000
Reexamination Certificate
active
08071229
ABSTRACT:
A perpendicular magnetic recording media is disclosed which employs inexpensive materials in the intermediate layer of the high-recording density media while exhibiting magnetic characteristics comparable or superior to those of media using Ru or Re. A perpendicular magnetic recording apparatus employing this perpendicular magnetic recording media also is disclosed. The perpendicular magnetic recording media has a nonmagnetic substrate, a soft magnetic backing layer formed on the nonmagnetic substrate, a seed layer formed on the soft magnetic backing layer, an intermediate layer formed on the seed layer, a magnetic layer formed on the intermediate layer, and a protective layer formed on the magnetic layer. The intermediate layer comprises an alloy with the hcp structure containing 55 at % or more Zn, the magnetic layer comprises an alloy with the hcp structure containing Co, and the Δθ50 value of the orientation plane (0002) of the magnetic layer is between 1.5° and 4°.
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Chau Linda
Fuji Electric & Co., Ltd.
Rickman Holly
Rossi Kimms & McDowell LLP
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