Flying-type composite magnetic head having magnetic core with improved flatness of air-bearing surface
US5008767A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1989 |
| Grant date | Apr 16, 1991 |
| Priority date | — |
| Expiry date | Jan 23, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/1871
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.