Recording medium having magnetic layer of smaller thickness

Details Recording medium having magnetic layer of smaller thickness Recording medium having magnetic layer of smaller thickness

2006-08-22

2006-08-22

Rickman, Holly (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S828100

Reexamination Certificate

active

07094482

ABSTRACT:
A polycrystalline structure film is formed on the surface of a substrate in a magnetic recording medium. The second magnetic layer has a saturation magnetic flux density Bs larger than that of the first magnetic layer in the polycrystalline structure film, so that the magnetic layer for recordation ensures a larger residual magnetization Br, as compared with the case where the first magnetic layer solely forms a magnetic layer for recordation. A sufficient magnitude of product tBr of thickness t and residual magnetization Br can be obtained even if the thickness of the overall magnetic layer for recordation is reduced. A sufficient magnitude of magnetic outputs can be ensured. A reduced thickness of the magnetic layer serves to minimize the magnetic crystal grains in the first and second magnetic layers. A higher resolution of recordation and reproduction can be obtained.

REFERENCES:
patent: 5736262 (1998-04-01), Ohkijima et al.
patent: 6071607 (2000-06-01), Okuyama et al.
patent: 6274233 (2001-08-01), Yoshikawa et al.
patent: 6610424 (2003-08-01), Acharya et al.
patent: 6645647 (2003-11-01), Litvinov et al.
patent: 6828036 (2004-12-01), Munteanu et al.
patent: 2002/0028355 (2002-03-01), Nakamura et al.
patent: 2003/0138665 (2003-07-01), Kanbe et al.
patent: 2004/0013910 (2004-01-01), Acharya et al.
patent: 63-014310 (1988-01-01), None
patent: 02-121116 (1990-05-01), None
patent: 05-258304 (1993-10-01), None
patent: 09-204628 (1997-08-01), None
patent: 11-283230 (1999-10-01), None
patent: 2001-148109 (2001-05-01), None
patent: 2001-291223 (2001-10-01), None
patent: 2002-008219 (2002-01-01), None
patent: 2002-197634 (2002-07-01), None
patent: 2004-515028 (2004-05-01), None
patent: WO 02/45080 (2002-06-01), None

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