Magnetic recording medium, method for producing the same,...

Details Magnetic recording medium, method for producing the same,... Magnetic recording medium, method for producing the same,...

2006-02-07

2006-02-07

Rickman, Holly (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

Reexamination Certificate

active

06994923

ABSTRACT:
A magnetic recording medium in which the medium noise is reduced and information can be recorded at a high S/N level, and a method for producing the magnetic recording medium are provided. A magnetic recording apparatus, which is excellent in thermal stability and which makes it possible to perform the high density recording, is provided. When films are formed for the magnetic recording medium based on the perpendicular magnetic recording method, the content of B in a seed layer is made sufficiently larger than the content of B in a recording layer. Accordingly, B is diffused from the seed layer to the recording layer to facilitate the segregation of B at the crystal grain boundary in the recording layer. Thereby, the magnetic interaction between the crystal grains in the recording layer is further reduced. Thus, it is possible to greatly reduce the transition noise.

REFERENCES:
patent: 2002/0015864 (2002-02-01), Maesaka et al.
patent: 2002/0048694 (2002-04-01), Mukai et al
patent: A 2002-25030 (2002-01-01), None
patent: A 2002-25032 (2002-01-01), None
patent: A 2002-352408 (2002-12-01), None
patent: A 2002-352409 (2002-12-01), None
patent: A 2003-123245 (2003-04-01), None

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