Process for making PMR writer with constant side wall angle
US9263067B1 · kind B1 · utility
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660References
12Claims
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Key dates
| Filing date | Jun 27, 2013 |
| Grant date | Feb 16, 2016 |
| Priority date | — |
| Expiry date | Dec 5, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6082
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process for manufacturing a writer main pole for a perpendicular magnetic recording system is provided. The writer pole may have a constant sidewall angle from the ABS to yoke and may be formed out of an insulating material and a magnetic material. The sidewall angle of the yoke region may be adjusted during manufacture. The ABS region may correspond to the magnetic material and the yoke region may correspond to the insulating material. The insulating material may comprise Alumina. The magnetic material may comprise a NiFe alloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.