CPP spin valve with ultra-thin CoFe(50%) laminations
US7288281B2 · kind B2 · utility
1Cited by
7References
18Claims
0Family size
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Key dates
| Filing date | Sep 2, 2004 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Sep 15, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/3996
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Fe rich CoFe can be used in AP1 to enhance CPP GMR. However, this is found to degrade the electro-migration performance of the device. This problem has been solved by using an AP1 that is a laminate of several CoFe(25%) layers, separated from one another by copper layers. Ultra-thin layers of iron-rich CoFe are then inserted at all the copper-CoFe interfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.