PMR writer with non-conformal side gaps
US9940951B2 · kind B2 · utility
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57References
14Claims
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Key dates
| Filing date | Feb 25, 2016 |
| Grant date | Apr 10, 2018 |
| Priority date | — |
| Expiry date | May 29, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A perpendicular magnetic recording (PMR) writer is configured to magnetically record data on a rotatable disk surface. The PMR writer including a pole tip, side shields, an air-bearing surface (ABS) region, a yoke region comprising Silicon Dioxide (SiO2), side gaps and a plurality of throat regions. The side gaps are arranged respectively between the pole tip and the side shields and include SiO2. A side gap width of the plurality of throat regions increases with a side shield throat height above the ABS region for each of the throat regions. The side gap width has a different width variation in each of the throat regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.