Composite thin-film magnetic head, magnetic head assembly and magnetic disk drive apparatus
US7675716B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2006 |
| Grant date | Mar 9, 2010 |
| Priority date | — |
| Expiry date | Nov 19, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A composite thin-film magnetic head includes a substrate, an under layer formed on the substrate, an MR read head element formed on the under layer and provided with a lower shield layer, an upper shield layer and an MR layer in which a sense current flows in a direction perpendicular to a surface of the MR layer through the upper shield layer and the lower shield layer, an inter-shield insulation layer laminated on the MR read head element, an inductive write head element formed on the inter-shield insulation layer and provided with a first magnetic pole layer, a nonmagnetic layer, a second magnetic pole layer whose end portion is opposed to an end portion of the first magnetic pole layer through the nonmagnetic layer, and a write coil, and an additional shield layer formed between the upper shield layer and the first magnetic pole layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.