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:
Apr. 16, 1991
Filed:
Jan. 23, 1989
Hitoshi Iwata, Kumagaya, JP;
Kazumi Noguchi, Kamikawa, JP;
Toshikazu Nishiyama, Fukaya, JP;
Tadashi Shinohara, Chiyoda, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Abstract
A flying-type composite magnetic head includes a slider made of a non-magnetic ceramic and having side rails extending longitudinally on both lateral sides of the head; a slit extending longitudinally in one of the side rails; and a magnetic core constituted by a pair of core pieces bonded to each other with a first glass and fixed in the slit with a second glass on both sides of the core. At least one of the opposing surfaces of the core pieces is formed with an Fe-Al-Si thin layer and the opposing surfaces of the core pieces constitute a magnetic gap of the magnetic core. Gaps formed on both sides of the magnetic core in a region exposed to an air-bearing surface of the head are filled with the second glass to improve the flatness of the air-bearing surface of the head.