Thin-film magnetic head suitable for narrow tracks
US6731457B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2001 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | May 18, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3163
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a thin-film magnetic head, an lower magnetic pole layer is formed on a lower core layer to form a step between the lower core layer and the lower magnetic pole layer. A coil layer and a coil-insulating layer are formed on the lower core layer, and an upper core layer is formed over the lower magnetic pole layer and the coil-insulating layer. This configuration decreases the height of the coil-insulating layer from the lower magnetic pole layer compared to the height in a conventional thin-film magnetic head. The front end of the upper core layer can be precisely formed so as to have a track width Tw. This thin-film magnetic head is suitable for narrower track widths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.