Perpendicular magnetic recording media

Details Perpendicular magnetic recording media Perpendicular magnetic recording media

2006-06-13

2006-06-13

Bernatz, Kevin M. (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S830000

Reexamination Certificate

active

07060375

ABSTRACT:
A perpendicular magnetic recording medium having a good thermal stability and a high recording density is provided. The perpendicular magnetic recording medium includes at least a first and a second perpendicular magnetic recording layer and a substrate supporting the first and the second perpendicular magnetic recording layers. The first and the second perpendicular magnetic recording layers have different physical/magnetic properties and are formed of materials that compensate the different physical/magnetic properties. The first and the second perpendicular magnetic recording layers are selected from a layer for improving perpendicular magnetic anisotropic energy (Ku), a layer for reducing the size of crystal grains, a layer for reducing the size of magnetic domains, a layer for increasing an SNR, a layer for improving signal output, a layer for reducing noise, a layer for improving the uniformity of crystal grain sizes, and a layer for improving the uniformity of magnetic domain sizes.

REFERENCES:
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patent: 2001/0051287 (2001-12-01), Kikitsu et al.
patent: 2002/0192506 (2002-12-01), Coffey et al.
patent: 2001344725 (2001-12-01), None
English translation of Chinese Office Action.

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