×

Use of multi-layer thin films as stress sensors

  • US 20040154405A1
  • Filed: 12/22/2003
  • Published: 08/12/2004
  • Est. Priority Date: 07/20/1999
  • Status: Abandoned Application
First Claim
Patent Images

1. An apparatus for sensing pressure comprising:

  • a sensor including;

    first and second free ferromagnetic layers; and

    a non magnetic conducting layer disposed between the first and second free ferromagnetic layers, the non magnetic conducting layer providing ferromagnetic coupling of the first and second free ferromagnetic layers in an initial state such that magnetization vectors of the first and second free ferromagnetic layers are substantially parallel to each other, wherein applied pressure causes a change in the magnetization vectors of the first and second ferromagnetic layers through the property of non-zero magnetostriction and a corresponding change in resistance of the first and second ferromagnetic layers.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×