Method to form a current confining path of a CPP GMR device
US7610674B2 · kind B2 · utility
17Cited by
3References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 13, 2006 |
| Grant date | Nov 3, 2009 |
| Priority date | — |
| Expiry date | Mar 28, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49052
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Concerns about inadequate electromigration robustness in CCP CPP GMR devices have been overcome by adding magnesium to the current confining structures that are presently in use. In one embodiment the alumina layer, in which the current carrying copper regions are embedded, is fully replaced by a magnesia layer. In other embodiments, alumina is still used but a layer of magnesium is included within the structure before it is subjected to ion assisted oxidation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.