Giant magnetoresistive sensor, thin-film read/write head and magnetic recording apparatus using the sensor
US6243288A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2000 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Aug 21, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A giant magnetoresistive sensor which is improved in reproduction output and peak asymmetry of read-back waveform. It is composed of a first free ferromagnetic film, a first non-magnetic film, a composite ferromagnetic film, a second non-magnetic film, and a second free ferromagnetic film, which are laminated sequentially, but has no antiferromagnetic film to fix said composite ferromagnetic film, and said composite ferromagnetic film contains a first, second, and third ferromagnetic film, which are antiferromagnetically coupled with one another, and also contains films which separate said ferromagnetic films from one another and antiferromagnetically couple them with one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.