Perpendicular magnetic recording head with a laminated main write pole
US6771464B2 · kind B2 · utility
17Cited by
30References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 14, 2002 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Jul 14, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0029
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A perpendicular magnetic recording head includes a laminated main write pole and a return pole magnetically coupled to the main write pole. The main write pole includes a first magnetic layer having a high saturation magnetization, a second magnetic layer having a high saturation magnetization, and a non-magnetic interlayer positioned between the first magnetic layer and the second magnetic layer. The first and second magnetic layers may comprise, for example, FexCoy, wherein 40≦x≦90 and 10≦y≦60.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.