Strain sensing element, pressure sensor, microphone, blood pressure sensor, and touch panel
First Claim
1. A strain sensing element to be provided on a substrate, the substrate being deformable, the element comprising:
- a reference layer;
a first magnetic layer;
a second magnetic layer, the first magnetic layer being provided between the reference layer and the second magnetic layer;
a spacer layer provided between the reference layer and the first magnetic layer; and
a magnetic coupling layer provided between the first magnetic layer and the second magnetic layer, the magnetic coupling layer including at least one selected from a group consisting of Ru, Rh and Ir,both of a first magnetization of the first magnetic layer and a second magnetization of the second magnetic layer being configured to change in accordance with a deformation of the substrate, anda first polarity of a magnetostriction constant of the first magnetic layer being the same as a second polarity of a magnetostriction constant of the second magnetic layer.
1 Assignment
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Accused Products
Abstract
According to one embodiment, a strain sensing element to be provided on a deformable substrate, the element includes: a reference layer; a magnetization free layer; and a spacer layer. Magnetization of the magnetization free layer changes in accordance with deformation of the substrate. The spacer layer is provided between the reference layer and the magnetization free layer. The magnetization free layer has: a first magnetic layer; a second magnetic layer; and a magnetic coupling layer. The first magnetic layer is provided in contact with the spacer layer. The second magnetic layer is provided to be separated from the first magnetic layer. The magnetic coupling layer is provided between the first magnetic layer and the second magnetic layer. Magnetization of the first magnetic layer is anti-parallel to magnetization of the second magnetic layer.
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Citations
18 Claims
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1. A strain sensing element to be provided on a substrate, the substrate being deformable, the element comprising:
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a reference layer; a first magnetic layer; a second magnetic layer, the first magnetic layer being provided between the reference layer and the second magnetic layer; a spacer layer provided between the reference layer and the first magnetic layer; and a magnetic coupling layer provided between the first magnetic layer and the second magnetic layer, the magnetic coupling layer including at least one selected from a group consisting of Ru, Rh and Ir, both of a first magnetization of the first magnetic layer and a second magnetization of the second magnetic layer being configured to change in accordance with a deformation of the substrate, and a first polarity of a magnetostriction constant of the first magnetic layer being the same as a second polarity of a magnetostriction constant of the second magnetic layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A pressure sensor comprising:
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a supporting part; a substrate supported by the supporting part, the substrate being deformable; and a strain sensing element provided on the substrate, the strain sensing element including; a reference layer; a first magnetic layer; a second magnetic layer, the first magnetic layer being provided between the reference layer and the second magnetic layer; a spacer layer provided between the reference layer and the first magnetic layer, and a magnetic coupling layer provided between the first magnetic layer and the second magnetic layer, the magnetic coupling layer including at least one selected from a group consisting of Ru, Rh and Ir, both of a first magnetization of the first magnetic layer and a second magnetization of the second magnetic layer being configured to change in accordance with a deformation of the substrate, and a first polarity of a magnetostriction constant of the first magnetic layer being the same as a second polarity of a magnetostriction constant of the second magnetic layer. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A microphone comprising:
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a pressure sensor; a board; and a cover, the pressure sensor being provided between the board and the cover, the pressure sensor including; a supporting part; a substrate supported by the supporting part, the substrate being deformable; and a strain sensing element provided on the substrate, the strain sensing element including; a reference layer; a first magnetic layer; a second magnetic layer;
the first magnetic layer being provided between the reference layer and the second magnetic layer;a spacer layer provided between the reference layer and the first magnetic layer, and a magnetic coupling layer provided between the first magnetic layer and the second magnetic layer, the magnetic coupling layer including at least one selected from a group consisting of Ru, Rh and Ir, both of a first magnetization of the first magnetic layer and a second magnetization of the second magnetic layer being configured to change in accordance with a deformation of the substrate, and a first polarity of a magnetostriction constant of the first magnetic layer being the same as a second polarity of a magnetostriction constant of the second magnetic layer.
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Specification