Composite type thin film magnetic head having a low parasitic capacitance between a write coil and an upper read head shield
US7274539B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2005 |
| Grant date | Sep 25, 2007 |
| Priority date | — |
| Expiry date | Apr 26, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A composite type thin-film magnetic head is provided, which comprises: a MR read head element having an upper shield layer, a lower shield layer, an MR layer in which a sense current flows in a direction perpendicular to a surface of the layer through the upper shield layer and the lower shield layer; an inductive write head element formed on the MR read head element, having an upper magnetic pole layer, a recording gap layer, a lower magnetic pole layer where end portion is opposed to an end portion of the upper magnetic pole layer through the recording gap layer, and a write coil; and a capacitance C12 between the write coil and the upper shield layer, set to 0.1 pF or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.