Manufacturing method of magnetic recording medium, the...

Details Manufacturing method of magnetic recording medium, the... Manufacturing method of magnetic recording medium, the...

2008-11-17

2011-11-29

Rickman, Holly (Department: 1785)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C427S526000, C427S528000, C427S531000, C427S130000, C427S131000

Reexamination Certificate

active

08067104

ABSTRACT:
A magnetic recording medium includes a substrate; and a recording film formed on the substrate and including a main magnetic film, the main magnetic film where a recording area and a guard area are formed by local ion doping, the guard area having saturation magnetization smaller than saturation magnetization of the recording area. A primary layer is provided at a substrate side of the main magnetic film. A main ingredient of the primary layer is at least one kind of atom selected from a group consisting of Cr, B, Mo, Al, Si, and C.

REFERENCES:
patent: 6331364 (2001-12-01), Baglin et al.
patent: 6383597 (2002-05-01), Fullerton et al.
patent: 2004/0180173 (2004-09-01), Do et al.
patent: 2009/0117409 (2009-05-01), Lee et al.
patent: 2009/0155628 (2009-06-01), Lee et al.
patent: B2 6-28093 (1991-01-01), None

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