Magneto-resistive read/write head having a combination pole/shield
US5734531A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1995 |
| Grant date | Mar 31, 1998 |
| Priority date | — |
| Expiry date | Oct 31, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/4886
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is an MR head, and the method of making the same, which has a pole/shield. In the preferred embodiment, the pole side of the pole/shield is constructed such that it has a length that is approximately equal to the length of the pole, and a shield side that is approximately the length of a shield. Through this construction, the MR element, which is disposed between the shield side and the shield, is fully shielded during a read operation. Additionally, the flux lines generated during a write operation approximate the length of the pole so that excessive fringing does not occur. As a result of the smaller flux lines generated between the pole and the pole side of the pole/shield, data may be more densely packed on the disk used in conjunction with the MR head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.