Perpendicular magnetic recording head with nonmagnetic write gap greater than twice side shield gap distance
US6954340B2 · kind B2 · utility
152Cited by
6References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2002 |
| Grant date | Oct 11, 2005 |
| Priority date | — |
| Expiry date | May 15, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/312
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic head for perpendicular recording on double layer media with suppressed side writing and controlled write width is disclosed. The present invention reduces the problem of side writing and controls the write width of the writing element by providing a writing element with a trailing edge sized dimensionally larger than the leading edge, side shields, and specifically spaced writing gaps placed at various distances between the write element and the side shields, return poles, and the main pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.