Magneto-resistance effect type composite head and production method thereof
US6333842A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1998 |
| Grant date | Dec 25, 2001 |
| Priority date | — |
| Expiry date | Dec 3, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49046
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a magneto-resistance effect (hereinafter, referred to as MR) type composite head. The head includes a reproduction head including an MR element arranged between a first and a second magnetic shield; and a recording head arranged next to the reproduction head so as to use the second magnetic shield as a first magnetic pole film and having a second magnetic pole film opposing to the first magnetic pole via a magnetic gap; the MR element including: a center region including a ferromagnetic tunnel junction magneto-resistance effect film (hereinafter, referred to as a TMR film) having: a first ferromagnetic layer and a second ferromagnetic layer for generating a magneto-resistance effect using the first and the second magnetic shields as electrodes so that a current flows in a an almost vertical direction between the first and the second magnetic shields; and a tunnel barrier layer provided between the first and the second ferromagnetic layer; and an end region arranged to sandwich the center region from both sides for applying a bias magnetic field to the center region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.