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:
Dec. 12, 1995
Filed:
Jul. 30, 1993
Kiyoto Yamaguchi, Kanagawa, JP;
Hiroyuki Uwazumi, Nagano, JP;
Kenji Ozawa, Kanagawa, JP;
Hisasi Yamasaki, Kanagawa, JP;
Fuji Electric Co., Ltd., , JP;
Abstract
To improve the sliding characteristics of a magnetic head by reducing a friction coefficient, and realize a magnetic recording medium with a high recording density and a large capacity, capable of reducing the flotation distance of the magnetic head. On the surface of a base, aluminum containing nitrogen aggregates locally to form islands of metal deposits, which are distributed discretely over the entire surface of the base. Meanwhile, on the metal deposits, a metal base layer, a magnetic layer, a protective layer, and a lubrication layer are laminated sequentially to form a magnetic recording disk. On the disk surface, ultrafine irregularities are formed that reflect the shapes of the metal deposits, thereby realizing a reduction in the friction coefficient.