Magnetic read head and hard disk drive
US7209328B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2004 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Aug 16, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3932
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic head using a tunneling magnetoresistance effect realizing both high output and wide bandwidth. By providing a magnetic read head and magnetic reading/playback apparatus related to the present invention characterized by comprising: a lower magnetic shield, an upper magnetic shield, a first electrode layer formed on said lower magnetic shield, a first ferromagnetic layer laminated on one end of said first electrode layer through a first insulator, a second ferromagnetic layer laminated on another end of said first electrode layer through a second insulator, a detecting electrode connected to said first ferromagnetic layer, and a second electrode layer electrically connecting said second ferromagnetic layer with said upper magnetic shield; it becomes possible to reduce the capacitance between the first ferromagnetic layer and the insulator and widen the bandwidth of the detecting signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.