Strain sensing element, pressure sensor, microphone, blood pressure sensor, and touch panel
First Claim
1. A sensing element provided on a film being deformable, the sensing element comprising:
- a non-magnetic layer;
a first magnetic layer;
a layer provided between the non-magnetic layer and the first magnetic layer, the layer contacting the non-magnetic layer, the layer including at least one selected from the group consisting of an oxide and a nitride;
a second magnetic layer provided between the layer and the first magnetic layer; and
a spacer layer provided between the first magnetic layer and the second magnetic layer, whereinat least a part of the second magnetic layer is amorphous and includes boron,an electric resistance of the sensing element is configured to change in accordance with a deformation of the film,the second magnetic layer includes a first portion and a second portion,the first portion is provided between the second portion and the spacer layer, anda concentration of boron in the first portion is lower than a concentration of boron in the second portion.
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Accused Products
Abstract
According to one embodiment, a strain sensing element is provided on a film unit configured to be deformed. The strain sensing element includes a functional layer, a first magnetic layer, a second magnetic layer, and a spacer layer. The functional layer includes at least one of an oxide and a nitride. The second magnetic layer is provided between the functional layer and the first magnetic layer. A magnetization of the second magnetic layer is variable in accordance with a deformation of the film unit. The spacer layer is provided between the first magnetic layer and the second magnetic layer. At least a part of the second magnetic layer is amorphous and includes boron.
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Citations
15 Claims
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1. A sensing element provided on a film being deformable, the sensing element comprising:
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a non-magnetic layer; a first magnetic layer; a layer provided between the non-magnetic layer and the first magnetic layer, the layer contacting the non-magnetic layer, the layer including at least one selected from the group consisting of an oxide and a nitride; a second magnetic layer provided between the layer and the first magnetic layer; and a spacer layer provided between the first magnetic layer and the second magnetic layer, wherein at least a part of the second magnetic layer is amorphous and includes boron, an electric resistance of the sensing element is configured to change in accordance with a deformation of the film, the second magnetic layer includes a first portion and a second portion, the first portion is provided between the second portion and the spacer layer, and a concentration of boron in the first portion is lower than a concentration of boron in the second portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A sensing element provided on a film being deformable, the sensing element comprising:
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a non-magnetic layer; a first magnetic layer; a layer provided between the non-magnetic layer and the first magnetic layer, the layer contacting the non-magnetic layer, the layer including at least one element selected from the group consisting of magnesium, silicon, and aluminum; a second magnetic layer provided between the layer and the first magnetic layer; and a spacer layer provided between the first magnetic layer and the second magnetic layer, wherein at least a part of the second magnetic layer is amorphous and includes boron, an electric resistance of the sensing element is configured to change in accordance with a deformation of the film, the second magnetic layer includes a first portion and a second portion, the first portion is provided between the second portion and the spacer layer, and a concentration of boron in the first portion is lower than a concentration of boron in the second portion.
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12. A pressure sensor comprising:
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a film being deformable; and a sensing element provided on the film, the sensing element including; a non-magnetic layer; a first magnetic layer; a layer provided between the non-magnetic layer and the first magnetic layer, the layer contacting the non-magnetic layer, the layer including at least one selected from the group consisting of an oxide and a nitride; a second magnetic layer provided between the layer and the first magnetic layer; and a spacer layer provided between the first magnetic layer and the second magnetic layer, wherein at least a part of the second magnetic layer is amorphous and includes boron, an electric resistance of the sensing element is configured to change in accordance with a deformation of the film, the second magnetic layer includes a first portion and a second portion, the first portion is provided between the second portion and the spacer layer, and a concentration of boron in the first portion is lower than a concentration of boron in the second portion.
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13. A microphone comprising:
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a pressure sensor, the pressure sensor including; a film being deformable; and a sensing element provided on the film, the sensing element including; a non-magnetic layer; a first magnetic layer; a layer provided between the non-magnetic layer and the first magnetic layer, the layer contacting the non-magnetic layer, the layer including at least one selected from the group consisting of an oxide and a nitride; a second magnetic layer provided between the layer and the first magnetic layer; and a spacer layer provided between the first magnetic layer and the second magnetic layer, wherein at least a part of the second magnetic layer is amorphous and includes boron, and an electric resistance of the sensing element is configured to change in accordance with a deformation of the film, the second magnetic layer includes a first portion and a second portion, the first portion is provided between the second portion and the spacer layer, and a concentration of boron in the first portion is lower than a concentration of boron in the second portion.
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14. A blood pressure sensor comprising:
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a pressure sensor, the pressure sensor including; a film being deformable; and a sensing element provided on the film, the sensing element including; a non-magnetic layer; a first magnetic layer; a layer provided between the non-magnetic layer and the first magnetic layer, the layer contacting the non-magnetic layer, the layer including at least one selected from the group consisting of an oxide and a nitride; a second magnetic layer provided between the layer and the first magnetic layer; and a spacer layer provided between the first magnetic layer and the second magnetic layer, wherein at least a part of the second magnetic layer is amorphous and includes boron, and an electric resistance of the sensing element is configured to change in accordance with a deformation of the film, the second magnetic layer includes a first portion and a second portion, the first portion is provided between the second portion and the spacer layer, and a concentration of boron in the first portion is lower than a concentration of boron in the second portion.
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15. A touch panel comprising:
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a pressure sensor, the pressure sensor including; a film being deformable; and a sensing element provided on the film, the sensing element including; a non-magnetic layer; a first magnetic layer; a layer provided between the non-magnetic layer and the first magnetic layer, the layer contacting the non-magnetic layer, the layer including at least one selected from the group consisting of an oxide and a nitride; a second magnetic layer provided between the layer and the first magnetic layer; and a spacer layer provided between the first magnetic layer and the second magnetic layer, wherein at least a part of the second magnetic layer is amorphous and includes boron, and an electric resistance of the sensing element is configured to change in accordance with a deformation of the film, the second magnetic layer includes a first portion and a second portion, the first portion is provided between the second portion and the spacer layer, and a concentration of boron in the first portion is lower than a concentration of boron in the second portion.
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Specification