Rounded top pole
US7298587B2 · kind B2 · utility
3Cited by
23References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2002 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Nov 11, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording head having an air bearing surface for confronting a surface of a rotating disc and comprising a pole tip and a generally rounded and substantially planar body attached to the pole tip is disclosed. The width of the pole tip defines a track width of data written to the rotating disc. The generally rounded shape of the top pole body is such that top pole magnetization gradually changes its direction and follows the edges of the body. Further, the pole tip has low remanence, gradual spin structure and no domain walls formed near the pole tip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.