Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2005-07-12
2005-07-12
Rickman, Holly (Department: 1773)
Stock material or miscellaneous articles
Composite
Of inorganic material
C428S690000
Reexamination Certificate
active
06916557
ABSTRACT:
A perpendicular magnetic recording medium includes an intermediate film formed of a plurality of layers between a soft magnetic film and a perpendicular magnetization film. The intermediate film includes at least two layers, i.e., an oxygen-containing layer, or a nonmetallic element-containing layer containing nitrogen, silicon or carbon, and a metallic layer formed on a surface side of the oxygen-containing layer or the nonmetallic element-containing layer. The metallic layer includes a plurality of isolated island-shaped structures. Crystal grains of the perpendicular magnetization film are formed so as to correspond to the isolated island-shaped structures. As a result, a high recording density is obtained.
REFERENCES:
patent: 6602621 (2003-08-01), Matsunuma et al.
patent: 6-295431 (1993-04-01), None
patent: 7-73429 (1993-08-01), None
patent: 2001-23140 (1999-07-01), None
patent: 2001-155329 (1999-11-01), None
patent: 2002-25032 (2000-06-01), None
Machine Translation of JP 07-073429.
Hirayama Yoshiyuki
Nakagawa Hiroyuki
Nemoto Hiroaki
Takekuma Ikuko
Tamai Ichiro
A. Marquez, Esq. Juan Carlos
Fisher Esq. Stanley P.
Hitachi Global Storage Technologies Japan Ltd.
Reed Smith LLP
Rickman Holly
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