Thin-film magnetic head, head gimbal assembly with thin-film magnetic head, head arm assembly with head gimbal assembly, magnetic disk drive apparatus with head gimbal assembly and manufacturing method of thin-film magnetic head
US7372667B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2005 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Apr 27, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3163
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thin-film magnetic head comprising an inductive element including at least: a lower magnetic pole; a write gap layer; and an upper magnetic pole opposed to the lower magnetic pole through the write gap layer, a width WP2 in a track-width direction at a facing-to-magnetic-medium top end of the upper magnetic pole being larger than a width WP1 in the track-width direction at a facing-to-magnetic-medium top end of the lower magnetic pole, and a distance FPDP2 between the top end of the upper magnetic pole and a flare point of the upper magnetic pole being smaller than a distance FPDP1 between the top end of the lower magnetic pole and a flare point of the lower magnetic pole, is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.