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. 12, 1995
Filed:
Jul. 08, 1994
Junichi Honda, Miyagi, JP;
Seiji Kumagai, Miyagi, JP;
Norikatsu Fujisawa, Miyagi, JP;
Masatoshi Hayakawa, Kanagawa, JP;
Masahiro Kikkawa, Miyagi, JP;
Miho Suzuki, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A magnetic head has a pair of magnetic core substrates formed of an oxide magnetic material, at least one of the magnetic core substrates having a gap film formed on an abutment surface thereof, the pair of magnetic core substrates being abutted to each other on the gap film as abutment surfaces, having a magnetic gap formed between them. The gap film is formed of platinum, the platinum group, or an alloy consisting mainly of platinum or the platinum group. The pair of magnetic core substrates are bonded to each other to be integrated into one unit by a non-magnetic glass. The magnetic gap has a track width of not greater than 50 .mu.m. The gap film has a thickness of not greater than 150 nm. The magnetic head includes a pair of magnetic core substrates formed of an oxide magnetic material, at least one of the magnetic core substrates having a gap film formed on an abutment surface thereof, the pair of magnetic core substrates being abutted to each other on the gap film as abutment surfaces, having a magnetic gap formed between them. The gap film is selectively formed of Cr or an alloy consisting mainly of Cr, Ti or an alloy consisting mainly of Ti, or Ta.sub.2 O.sub.5 or an oxide consisting mainly of Ta.sub.2 O.sub.5. At least one of the pair of magnetic core substrates has its abutment surface inversely sputtered and then has a gap film formed thereon.