Magnetic transduction sensor device, manufacturing process and detection process therefrom
US7451641B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2004 |
| Grant date | Nov 18, 2008 |
| Priority date | — |
| Expiry date | Apr 19, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P15/105
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic pressure sensor device comprises at least one magnetic layer able to vary a magnetisation associated thereto in response to a pressure (P) exerted thereon. The device comprises a plurality of layers arranged in a stack, the magnetic layer able to vary a magnetisation associated thereto in response to a pressure (P) comprising a free magnetic layer, able to be associated to a temporary magnetisation (MT), the free magnetic layer belonging to said plurality of layers, which further comprises at least a spacer layer and a permanent magnetic layer associated to a permanent magnetisation (MP). The sensor device further comprises a compressible layer and a layer with high magnetic coercivity associated to the plurality of layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.