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. 31, 1996
Filed:
Oct. 17, 1994
Masanori Tanabe, Odawara, JP;
Hiroshi Fukui, Hitachi, JP;
Tadayuki Iwakura, Hitachi, JP;
Kazuhiro Nakamoto, Hitachi, JP;
Moriaki Fuyama, Hitachi, JP;
Katsuya Mitsuoka, Hitachi, JP;
Masaaki Sano, Hitachi, JP;
Makoto Saito, Hiratsuka, JP;
Makoto Aihara, Katsuta, JP;
Shuji Sudo, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic disc unit has a thin film magnetic head in which a lower magnetic core and an upper magnetic core form a magnetic circuit. The upper magnetic core is constructed by magnetic films having at least two layers. A saturation magnetic flux density of the inside magnetic film, of the magnetic films having at least two layers, facing a magnetic gap of the magnetic circuit is larger than that of the outside magnetic films of the upper magnetic core and the lower magnetic core.