Perpendicular magnetic recording head for high frequency drive
US7646564B2 · kind B2 · utility
16Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2006 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Sep 20, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3163
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Embodiments of the invention provide a perpendicular magnetic head with a narrow track and excellent high frequency characteristics. In one embodiment, a recording magnetic head includes coil conductors and magnetic pole pieces putting the same therebetween, in which a main magnetic pole piece is formed into a planar structure and a magnetic film connected with the main magnetic pole piece in a magnetic coupling relation is curved in the direction of the film thickness. Further, a shield material disposed near the main magnetic pole piece is made of a material of higher resistance than that of the material for the read shield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.