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:
Mar. 12, 1991
Filed:
Mar. 27, 1989
Applicant:
Inventors:
Ryo Goto, Mouka, JP;
Tadafumi Tomitani, Mouka, JP;
Fumio Nitanda, Fukaya, JP;
Manabu Toyoda, Mouka, JP;
Makoto Ushijima, Tokyo, JP;
Assignee:
Hitachi Metals, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360120 ; 360119 ; 360125 ;
Abstract
A magnetic core for a flying-type composite magnetic head, including a pair of core pieces, a glass portion for bonding the core pieces, and a thin magnetic metal layer of Fe-Al-Si alloys formed on at least one of opposing surfaces of the core pieces. The thin magnetic metal layer extends by 10 .mu.m or more from an apex of a magnetic gap defined by the core pieces and has an inner end existing by 15 .mu.m or more inside an inner end of the bonding glass portion.