Robust giant magnetoresistive effect type multilayer sensor
US6501271B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 1999 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | May 6, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/90
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A robust Giant Magneto Resistive effect type multilayer sensor comprising a free and a pinned ferromagnetic layer, which can withstand high temperatures and strong magnetic fields as required in automotive applications. The GMR multi-layer has an asymmetric magneto-resistive curve and enables sensors with complementary output signals so that a Wheatstone bridge is possible. The improvement is obtained by a combination of measures including the use of a combination of an Artificial Anti Ferromagnet as the pinned layer and an IrMn exchange-biasing layer, the latter preferably arranged at the bottom of the layer stack on top of a buffer layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.