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:
Sep. 28, 1999
Filed:
Jun. 03, 1996
Mitsuyoshi Ootake, Yokohama, JP;
Yuichi Kokaku, Yokohama, JP;
Yoshinori Honda, Hiratsuka, JP;
Akira Kato, Odawara, JP;
Hiroaki Hagimae, Chigasaki, JP;
Heigo Ishihara, Nishitama-gun, JP;
Kenji Furusawa, Hiratsuka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A thin film magnetic disc in which dot-like scattered bumps, made of a material different from that of the protective layer, are formed on the protective layer, and a lubricant layer is formed on the surfaces of the protective layer and the scattered bumps. A protective layer excellent in strength and disk durability is obtained by using a material different from that of the bumps. The functions of the protective layer and scattered bumps are separated from each other and make full use of the different materials. Such a protective layer is effective to reduce spacing between a head and the disc.