Stock material or miscellaneous articles – Magnetic recording component or stock – Thin film media
Reexamination Certificate
2008-09-16
2008-09-16
Bernatz, Kevin M (Department: 1794)
Stock material or miscellaneous articles
Magnetic recording component or stock
Thin film media
C428S829000, C428S830000, C428S216000, C360S131000
Reexamination Certificate
active
11051536
ABSTRACT:
A laminate structure is disclosed comprising multiple ferromagnetic layers achieving incoherent reversal while maintaining good SNR. A high magnetic moment density, low anisotropy field material may form a thin overlayer deposited over a high-anisotropy media layer. The media layer may have a lower magnetic moment density than the overlayer and have decoupled magnetic grains. A coupling layer may be interposed between the overlayer and the media layer to modulate the exchange there between, thereby reducing the pass-through of noise while still promoting incoherent reversal to achieve reduced write energy requirements.
REFERENCES:
patent: 5176965 (1993-01-01), Mallary
patent: 5431969 (1995-07-01), Mallary
patent: 5736235 (1998-04-01), Matsuda et al.
patent: 5738945 (1998-04-01), Lal et al.
patent: 5759681 (1998-06-01), Hosoe et al.
patent: 5861220 (1999-01-01), Coughlin
patent: 6007924 (1999-12-01), Lal et al.
patent: 6043947 (2000-03-01), Gooch et al.
patent: 6077586 (2000-06-01), Bian et al.
patent: 6280813 (2001-08-01), Carey et al.
patent: 6440589 (2002-08-01), Fullerton et al.
patent: 6602612 (2003-08-01), Abarra et al.
patent: 6645614 (2003-11-01), Girt et al.
patent: 6773834 (2004-08-01), Do et al.
patent: 6777112 (2004-08-01), Girt et al.
patent: 6811890 (2004-11-01), Zhou et al.
patent: 6852426 (2005-02-01), Girt et al.
patent: 6939626 (2005-09-01), Tang
patent: 7081309 (2006-07-01), Do et al.
patent: 7149045 (2006-12-01), Mallary et al.
patent: 2001/0009727 (2001-07-01), Akimoto et al.
patent: 2002/0160230 (2002-10-01), Yoshikawa et al.
patent: 2003/0134150 (2003-07-01), Hong et al.
patent: 2003/0152805 (2003-08-01), Bertero et al.
patent: 2003/0170500 (2003-09-01), Shimizu et al.
patent: 2004/0166371 (2004-08-01), Berger et al.
patent: 2005/0053803 (2005-03-01), Umeda et al.
patent: 63048611 (1988-03-01), None
patent: 3160615 (1991-07-01), None
patent: 2000322724 (2000-11-01), None
patent: WO-93/12928 (1993-07-01), None
T. Gouke et al., “Noise Property of Co-Cr-Pt-B Longitudinal Recording Media Separated by a Ru/Co-Cr/Ru Exchange-Coupling Layer”, J.Mag.Soc.Jap vol. 28 No. 6, pp. 797-801.
J.P. Wang et al., “Anti-Ferromagnetic Coupling Effects on Energy Barrier and Reversal Properties of Recording Media”, IEEE MAG vol. 37 No. 4, pp. 1445-1448.
Do Hoa Van
Fullerton Eric Edward
Margulies David Thomas
Supper Natacha
Bernatz Kevin M
Hitachi Global Storage Technologies - Netherlands B.V.
Kunzler & McKenzie
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