Magnetic head for perpendicular magnetic recording including pole-layer-encasing layer that opens in the top surface thereof and nonmagnetic conductive layer disposed on the top surface of the pole-layer-encasing layer
US7333296B2 · kind B2 · utility
10Cited by
11References
3Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 7, 2004 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Oct 8, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4906
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pole layer is disposed in a groove of a pole-layer-encasing layer made of a nonmagnetic material with a nonmagnetic film disposed between the encasing layer and the pole layer. A polishing stopper layer made of a nonmagnetic conductive material is disposed on the top surface of the encasing layer. The polishing stopper layer indicates the level at which polishing for controlling the thickness of the pole layer is stopped. The polishing stopper layer has a penetrating opening, and the edge of the opening is located directly above the edge of the groove located in the top surface of the encasing layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.