Magnetic head having a read element upper shield film and a write element lower magnetic film separated by a non-magnetic film having a thickness such that magnetic coupling is enduced therebetween
US5850325A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1997 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Apr 1, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An MR element and an inductive element are provided. The MR element is provided with a first magnetic shield film and a second magnetic shield film on the two sides of a magnetoresistive film. A first magnetic film of the inductive element and the second magnetic shield film are separated from each other by a non- magnetic film. The non- magnetic film induces magnetic coupling between the second magnetic shield film and the first magnetic film. The width of the first pole portion of the first magnetic film is smaller than the width of the second magnetic shield film and the saturation magnetization of the first magnetic film is higher than the saturation magnetization of the second magnetic shield film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.