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. 21, 2004
Filed:
Dec. 30, 2002
Hidetoshi Anan, Yokohama, JP;
Tetsuya Matsusaki, Odawara, JP;
Hidekazu Kohira, Ninomiya, JP;
Yoshihiro Shiroishi, Hachioji, JP;
Masaaki Matsumoto, Fujisawa, JP;
Hideaki Tanaka, Odawara, JP;
Teruyoshi Higashiya, Ninomiya, JP;
Kiyoshi Hashimoto, Odawara, JP;
Akira Matsuda, Odawara, JP;
Takanori Yamazaki, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic disk device, which is provided with a magnetic head slider mounted with a magnetic head and a magnetic disk, and of which the magnetic head slider has the possibility of contacting the magnetic disk at the vicinity of the magnetic head. The magnetic head slider has the size of 1.25 mm or less in length, 1 mm or less in width and 0.3 mm or less in thickness, and the friction force exerted between the magnetic head slider and the magnetic disk is 10 mN or less. The magnetic head comprises four substantially parallel surfaces and the depth from a first surface which is the most adjacent surface to the magnetic disk to a second surface is 10 nm to 50 nm, the depth from the second surface to a third surface is 50 nm to 200 nm, and the depth from the third surface to a fourth surface is 400 nm to 1 &mgr;m.