Perpendicular pole head for servo writing magnetic media
US8867157B2 · kind B2 · utility
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49References
19Claims
0Family size
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Key dates
| Filing date | Jan 30, 2013 |
| Grant date | Oct 21, 2014 |
| Priority date | — |
| Expiry date | Jan 30, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/584
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure relates to a perpendicular pole head for creating a perpendicular magnetic moment in a concentrated pattern for writing the pattern on perpendicular magnetic media, such as BaFe based media. The pole head can have flux concentrators in the shape of the written pattern, which can be repeatedly applied to a moving magnetic medium to create a timing pattern on the media, e.g., a servo timing pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.