Stock material or miscellaneous articles – Magnetic recording component or stock – Magnetic recording media substrate
Reexamination Certificate
2006-06-28
2009-12-22
Bernatz, Kevin M. (Department: 1794)
Stock material or miscellaneous articles
Magnetic recording component or stock
Magnetic recording media substrate
C428S848800, C360S135000
Reexamination Certificate
active
07635529
ABSTRACT:
According to one embodiment, a substrate for a magnetic recording media has circumferential protrusions corresponding to recording tracks and circumferential recesses corresponding to grooves between the recording tracks, in which the substrate satisfying at least one of conditions of (a) a surface of the recess has a surface energy smaller than that of the protrusion, (b) the surface of the recess is modified with a thermally decomposable or deformable substance, (c) the surface of the recess has surface roughness smaller than that of the protrusion, (d) crystal orientation is more disturbed on the surface of the recess than on the protrusion, (e) the surface of the recess is modified with a substance that causes reaction with a magnetic material or that diffuses into the magnetic material, and (f) the surface of the recess is modified with a substance soluble in a solvent or with a deformable substance.
REFERENCES:
patent: 4343831 (1982-08-01), Tsuji et al.
patent: 5353182 (1994-10-01), Nakamura et al.
patent: 5381284 (1995-01-01), Gregory et al.
patent: 5385409 (1995-01-01), Ide
patent: 5705253 (1998-01-01), Berg et al.
patent: 6168845 (2001-01-01), Fontana, Jr. et al.
patent: 6238796 (2001-05-01), Liu et al.
patent: 2003/0090833 (2003-05-01), Tani et al.
patent: 2005/0120545 (2005-06-01), Wachenschwanz et al.
patent: 2005/0282382 (2005-12-01), Ko et al.
patent: 1922674 (2007-02-01), None
patent: 1775118 (2007-02-01), None
patent: 05-205257 (1993-08-01), None
patent: 06-076278 (1994-03-01), None
patent: 08-115519 (1996-05-01), None
patent: 08-203058 (1996-08-01), None
patent: 09-245345 (1997-09-01), None
patent: 2002-359138 (2002-12-01), None
patent: 2003-016622 (2003-01-01), None
Chinese Office Action dated Nov. 30, 2007 for Appln. No. 200610094256.9.
Austrian Search Report dated Feb. 22, 2008 for Appln. No. 200604142-0.
Japanese Office Action dated Sep. 15, 2009 for Appln. No. 2005-188384.
Kamata Yoshiyuki
Kihara Naoko
Kikitsu Akira
Naito Katsuyuki
Oka Masahiro
Bernatz Kevin M.
Falasco Louis
Kabushiki Kaisha Toshiba
Pillsbury Winthrop Shaw & Pittman LLP
Showa Denko K.K.
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