Perpendicular recording write head having a recessed magnetic adjunct pole and method of making the same
US6791793B1 · kind B1 · utility
175Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2001 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Jun 3, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49044
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A read/write head and method of making the same, are used in a data storage system, such as a disk drive, for perpendicular magnetic recording of data. The head employs a two-layer pole design with a main pole made of sputtered high moment magnetic material, and an adjunct pole made of electroplated soft magnetic film. The adjunct pole is substantially recessed from the air bearing surface. The present head design significantly enhances the magnetic write field, and substantially reduces side-writing that result in accidental erasure of data in adjacent tracks on the magnetic recording medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.