Method and apparatus for performing spin valve combined pinned layer reset and hard bias initialization at the HGA level
US6728055B1 · kind B1 · utility
8Cited by
11References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2000 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Mar 21, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method and apparatus for performing automated spin valve combined pinned layer reset and hard bias initialization at the head gimbal assembly level. The reset combines a current pulse with an assisting magnetic field. The pinned layer reset and hard bias initialization is automated and performed by a single tool at the head gimbal assembly level to increase manufacturing throughput.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.