Coating processes – Magnetic base or coating
Reexamination Certificate
2007-02-27
2007-02-27
Bashore, Alain L. (Department: 1762)
Coating processes
Magnetic base or coating
C427S128000, C427S130000, C427S131000, C427S132000, C428S611000
Reexamination Certificate
active
10774371
ABSTRACT:
A magnetic recording medium having a high coercive force and being capable of high-density writing/reading has a substrate, a soft magnetic layer, a non-magnetic intermediate layer, a magnetic layer, a protective layer, and a lubricating layer. The magnetic layer is characterized by stacking fault density and dispersion of particle diameters. The stacking fault density should preferably be no larger than 0.05, and the dispersion of particle diameters should preferably be no larger than 0.4. The magnetic recording medium has a coercive force larger than 4000 Oe, is highly stable to thermal decay, and has a recording density in excess of 50 Gbit/in2.
REFERENCES:
patent: 5738927 (1998-04-01), Nakamura et al.
patent: 5815343 (1998-09-01), Ishikawa et al.
patent: 5939202 (1999-08-01), Ataka et al.
patent: 6080476 (2000-06-01), Kanbe et al.
patent: 6168861 (2001-01-01), Chen et al.
patent: 6432563 (2002-08-01), Zou et al.
patent: 10-269548 (1998-10-01), None
Journal of Magnetism and Magnetic Materials, 152 (1996), “Effects of Pt additionon the magnetic and crystallographic properties of Co-Cr-Pt thin-film media”, A. Ishikawa et al, pp. 265-273.
Nakatani, Y. and Hayashi, N., IEEE Trans. Mag., 34(4), 1998, 1618-1620.
Ikeda, Y., Sonobe, Y., Zeltzer, G., Yen, B., Takano, K., Do H., Fullerton, E., and Rice, P., IEEE Trans. Mag., 37(4), 2001, 1583, 1585.
Lu, B., Klemmer, T., Khizroev, S., Howard, J., Litvinov, D., Roy, A., and Laughlin, D., IEEE Trans. Mag., 37(4), 2001, 1319-1321.
Yamanaka, K., Hamamoto, T., Nakano, Y. and Miura, M., IEEE Trans. Mag., 37(4), 2001, 1599-1601.
Futamoto, M., Honda, Y., Hirayama, Y., Itoh, K., Ide, H., and Maruyama, Y., IEEE Trans. Mag., 32(5), 1996, 3789-3794.
Hosoe Yuzuru
Takahashi Yoshio
Tamai Ichiro
Tanahashi Kiwamu
Bashore Alain L.
Hitachi Global Storage Technologies Japan Ltd.
Mattingly ,Stanger ,Malur & Brundidge, P.C.
LandOfFree
Magnetic recording medium and its manufacturing method and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic recording medium and its manufacturing method and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic recording medium and its manufacturing method and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3860979