Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

2011-08-30

2011-08-30

Speer, Timothy M (Department: 1784)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S827000, C428S697000, C428S836100, C428S831000, C428S832200, C428S828000, C428S829000, C428S830000, C428S212000

Reexamination Certificate

active

08007931

ABSTRACT:
A perpendicular magnetic recording medium including: a substrate; a perpendicular magnetic recording layer disposed over the substrate; a soft magnetic underlayer disposed between the substrate and the perpendicular magnetic recording layer; a shunting layer disposed under the soft magnetic underlayer; and an isolation layer disposed between the soft magnetic underlayer and the shunting layer and providing magnetic isolation between the shunting layer and the other layers disposed over the shunting layer are provided. The shunting layer is magnetically separated from the other magnetic layers disposed over the shunting layer, and shunts a magnetic field generated by the magnetic domain walls of the soft magnetic underlayer such that the magnetic field cannot reach a magnetic head, thereby increasing a signal-to-noise ratio (SNR).

REFERENCES:
patent: 4687712 (1987-08-01), Sugita et al.
patent: 5633092 (1997-05-01), Gibbs
patent: 6002553 (1999-12-01), Stearns et al.
patent: 6635367 (2003-10-01), Igarashi et al.
patent: 6645647 (2003-11-01), Litvinov et al.
patent: 6682826 (2004-01-01), Shimizu et al.
patent: 6686070 (2004-02-01), Futamoto et al.
patent: 6890667 (2005-05-01), Lairson et al.
patent: 6893748 (2005-05-01), Bertero et al.
patent: 2002/0048693 (2002-04-01), Tanahashi et al.
patent: 2003/0035973 (2003-02-01), Trindade et al.
patent: 2003/0214742 (2003-11-01), Kai et al.
patent: 2005/0202286 (2005-09-01), Chen et al.
patent: 2006/0166039 (2006-07-01), Berger et al.
patent: 2007/0065681 (2007-03-01), Girt et al.
patent: 1303090 (2001-07-01), None
patent: 10-228620 (1998-08-01), None
Office Action issued Mar. 9, 2011 in counterpart Chinese Application No. 200610148546.7.

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