Magnetic head having an integrated recording and playback head and an erasure head
US4774616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1984 |
| Grant date | Sep 27, 1988 |
| Priority date | — |
| Expiry date | Dec 4, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/2655
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a magnetic head, which can form guard bands on a magnetic recording medium and which is especially suitable for magnetic discs, and a fabrication process thereof. The magnetic core of the present invention includes a recording and reproduction head core (31) and an erasure head core (32) which is integrally joined in series to the head core (31) for forming guard bands. Magnetic circuits are constructed of metallic magnetic materials (34), (34'), (35) and (35') formed on non-magnetic members (33) and (33'). As a result, a recording medium having high coercive forces can be recorded while the track width is reduced and the fabrication is facilitated with a high accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.