Thin-film magnetic head having metal film formed on gap-depth defining layer, and production method therefor
US6801393B2 · kind B2 · utility
7Cited by
6References
22Claims
0Family size
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Key dates
| Filing date | Feb 5, 2002 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Jan 3, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3143
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A metal film is formed on the upper surface of a gap-depth defining layer. This makes it possible to form an upper magnetic layer with a predetermined thickness over a gap layer and the metal film by plating, and to produce a thin-film magnetic head which can reduce the magnetic saturation. The positions of a rear edge of the upper magnetic layer or the like, which contributes to the characteristics, such as overwriting characteristics, can be easily and freely changed in order to optimize the characteristics, and the controllability of the track width can be enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.