Recording head writer with high magnetic moment material at the writer gap and associated process
US7688545B1 · kind B1 · utility
16Cited by
28References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 17, 2003 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Feb 17, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3153
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording head with an overall planar design and tight dimensional control of throat height and notch width is achieved below the gap. Writer poles include very high magnetic moment material on both sides of the writer gap. Additionally the pole tips are shaped to provide high field with good spatial gradient for optimal writing conditions, thereby extending the capability of longitudinal recording heads for high density and high frequency applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.