Magnetic write head with recessed overcoat
US7212380B2 · kind B2 · utility
7Cited by
8References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 26, 2004 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Aug 5, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3143
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetoresistive read/write head having a first layer of alumina and a second layer of silicon dioxide overlaying a P3 layer of the head. In a preferred embodiment, the silicon dioxide layer is recessed away from an Air Bearing Surface (ABS) to reduce protrusion of a P2 layer and the P3 layer in the head, and to reduce degradation in the magnetic properties of the pole tips of the P2 and P3 layer ends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.