Dual pseudo spin valve heads
US6731473B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2001 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Aug 1, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/934
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention presents a method and system for fabricating a dual GMR read head, which possess a pseudo spin valve structure. The spin valve structure includes a first thick Co-alloy based reference layer with first and second surfaces. The structure includes a first spacer layer including a first surface contacting the first surface of the first thick Co-alloy layer and a second surface contacting a first surface of a first free layer. The structure also includes a second spacer layer including a first surface separated from the second surface of the first free layer and a second surface contacting a first surface of a second thick Co-alloy layer. The thickness of the first and second thick Co-based alloy can be approximately between 30 and 55 å.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.