Magneto-resistive head
US4816948A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1987 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Feb 10, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3903
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Magneto-resistive head comprising a magneto-resistive film, and a soft magnetic film disposed at one side of said magneto-resistive film, which soft magnetic film is magnetized by electric current flowing through the magneto-resistive film, to which a bias magnetic field is applied by the magnetization of the soft magnetic film, whereby they are so structured that 0.7.times.B.sub.SMR .times.T.sub.MR <B.sub.SSF .times.T.sub.SF is satisfied, where T.sub.MR and B.sub.SMR represent the thickness and the saturated magnetic flux density, respectively, of the magneto-resistive film and T.sub.SF and B.sub.SSF represent the thickness and the saturated magnetic flux density, respectively, of the soft magnetic film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.