Laminated return pole for suppressing side track erasure
US7561379B2 · kind B2 · utility
9Cited by
27References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2005 |
| Grant date | Jul 14, 2009 |
| Priority date | — |
| Expiry date | Mar 8, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A perpendicular writer includes a surface, a main pole proximate the surface, a return pole proximate the surface, and a back yoke connecting the main pole to the return pole distal the surface. The return pole is configured such that a magnetization of a portion of the return pole adjacent the surface is held substantially parallel to the surface during a write operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.