Magnetic recording medium and method for manufacturing same

Details Magnetic recording medium and method for manufacturing same Magnetic recording medium and method for manufacturing same

2007-04-17

2007-04-17

Bashore, Alain L. (Department: 1762)

Coating processes

Magnetic base or coating

C427S128000, C427S130000, C427S132000, C428S629000, C428S632000, C428S668000, C428S669000

Reexamination Certificate

active

10757901

ABSTRACT:
A magnetic recording medium has a non-magnetic under-layer, a magnetic layer, a protective film and a liquid lubricant layer sequentially laminated on a non-magnetic substrate. The magnetic layer has a multi-layer structure laminated with two or more magnetic layer components, each of the magnetic layer components having ferromagnetic grains and non-magnetic grain boundaries surrounding the grain. The resulting magnetic recording medium has a granular magnetic layer exhibiting very high Hc accompanying high density of magnetic recording, while decreasing the amount of platinum needed for attaining the high Hc, and reducing media noise accompanying the high recording density.

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patent: 0 540 058 (1993-05-01), None

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