Magneto-resistive thin film magnetic head preventing entry of unnecessary magnetic flux and having good reproduction characteristics
US6538855B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2000 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Jun 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-resistive thin film magnetic head is provided, which magnetic head includes: a base; a first yoke provided on the base and separated by a gap into first and second portions, the first portion including a side which opposes a magnetic recording medium; a magneto-resistive element which is magnetically coupled to the first and second portions of the first yoke and detects a magnetic recording signal; a second yoke formed on the first yoke so as to form a reproducing head gap between the first portion of the first yoke and the second yoke; and a third yoke provided between the first portion of the first yoke and the base so as to be magnetically coupled to the first portion of the first yoke. The reproducing head gap, the first portion of the first yoke, the magneto-resistive element, the second portion of the first yoke, ad the second yoke form a cut magnetic circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.