The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2005
Filed:
Nov. 14, 2002
Mitsuhiro Shoda, Odawara, JP;
Naoto Endo, Odawara, JP;
Noriyoshi Goda, Odawara, JP;
Yuzuru Hosoe, Hino, JP;
Akira Kato, Odawara, JP;
Mitsuhiro Shoda, Odawara, JP;
Naoto Endo, Odawara, JP;
Noriyoshi Goda, Odawara, JP;
Yuzuru Hosoe, Hino, JP;
Akira Kato, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic recording media formed of magnetic alloy layer of Co as the main component on a substrate through an under-layer, a protective layer and a lubricant layer, stacked in this order, said under-layer comprises plural under-layers including a first under layer of a substantially amorphous and a second under layer of crystalline stacked in this order; and a Δ BH[0.01, 50] defined by |BH[0.01%]−BH[50%]|, as the difference between a height BH[0.01%] where a Bearing ratio is 0.01% and a height BH[50%] where a Bearing ratio is 50%, is not less than 3 nm and not more than 6 nm, where a Bearing Curve is given by a surface roughness curve of magnetic recording media.