Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2005-08-09
2005-08-09
Rickman, Holly (Department: 1773)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S690000
Reexamination Certificate
active
06926974
ABSTRACT:
An improved perpendicular magnetic recording medium and an improved magnetic storage apparatus are provided, which are suitable for high speed and high density magnetic recording. A magnetic under layer of a two-layered perpendicular magnetic recording medium includes three layers: a ferromagnetic layer; a non-magnetic layer; and a ferromagnetic layer, wherein the ferromagnetic layers are antiferromagnetically coupled with each other, thereby preventing a magnetic flux from a magnetic wall in a magnetic under layer from entering a read back head.
REFERENCES:
patent: 4687712 (1987-08-01), Sugita et al.
patent: 5226966 (1993-07-01), Mallary et al.
patent: 5589262 (1996-12-01), Kiuchi et al.
patent: 5851643 (1998-12-01), Honda et al.
patent: 6280813 (2001-08-01), Carey et al.
patent: 6383668 (2002-05-01), Fullerton et al.
patent: 6686070 (2004-02-01), Honda et al.
patent: 6740383 (2004-05-01), Shinohara et al.
patent: 2002/0028357 (2002-03-01), Shukh et al.
patent: 2002/0127433 (2002-09-01), Shimizu et al.
patent: 60-140525 (1983-12-01), None
patent: 1-227216 (1988-03-01), None
patent: 6-103550 (1992-09-01), None
patent: 7-85442 (1993-09-01), None
patent: 10-228620 (1997-02-01), None
patent: 2001-155321 (1999-11-01), None
Toshikazu Nishihara et al., “High SN Ratio and Signal-Stability in Triple Layer Perpendicular Media”, Central R&D Center, JVC, with English abstract, pp. 104-108.
J. R. Desserre, “Crucial Points in Perpendicular Recording”, IEEE Transactions on Magnetics, vol. MAG- 20, No. 5, (Sep. 1984), pp. 663-668.
Shun-ichi Iwasaki, “Perpendicular Magnetic Recording—Evolution and Future”, IEEE Transactions on Magnetics, vol. MAG-20, No. 5, (Sep. 1984), pp. 657-662.
Toshikazu Nishihara and Toshio Ando, “High SN Ratio And Signal-Stability In Triple Layer Perpendicular Media”, Central R&D Center, JVC, pp. 104-108.
Iwasaki, “Perpendicular Magnetic Recording—Evolution and Future,” IEEE Transactions on Magnetics, vol. Mag-20, No. 5, Sep. 1984, pp. 657-662.
Desserre, “Crucial Points in Perpendicular Recording,” IEEE Transactions on Magnetics, vol. Mag-20, No. 5, Sep. 1984, pp. 663-668.
Futamoto Masaaki
Kawato Yoshiaki
Nakamoto Kazuhiro
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Hitachi Global Storage Technologies Japan Ltd.
Reed Smith LLP
Rickman Holly
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