Pressure sensor and microphone
First Claim
1. A pressure sensor comprising:
- a base;
a first sensor unit provided on the base;
a second sensor unit provided at a location on the base different from a location of the first sensor unit;
the first sensor unit including;
a first transducer thin film having a first membrane surface, the first transducer thin film being flexible;
a first strain sensing device provided at a location on the first membrane surface different from a location of a barycenter of the first membrane surface, the first strain sensing device including a first magnetic layer, a second magnetic layer, and a first intermediate layer provided between the first magnetic layer and the second magnetic layer,the second sensor unit including;
a second transducer thin film having a second membrane surface, the second transducer thin film being flexible; and
a third strain sensing device provided on the second membrane surface, the third strain sensing device including a fifth magnetic layer, a sixth magnetic layer, and a third intermediate layer provided between the fifth magnetic layer and the sixth magnetic layer, the third intermediate layer being nonmagnetic,a width of the second transducer thin film passing through a barycenter of the second membrane surface of the second transducer thin film along a direction parallel with the second membrane surface being different from a width of the first transducer thin film passing through the barycenter of the first membrane surface of the first transducer thin film along a direction parallel with the first membrane surface.
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Abstract
According to one embodiment, a pressure sensor includes a base, and a first sensor unit. The first sensor unit includes a first transducer thin film, a first strain sensing device and a second strain sensing device. The first strain sensing device includes a first magnetic layer, a second magnetic layer, and a first intermediate layer provided between the first and the second magnetic layers. The second strain sensing device is provided apart from the first strain sensing device on the first membrane surface and provided at a location different from a location of the barycenter, the second strain sensing device including a third magnetic layer, a fourth magnetic layer, and a second intermediate layer provided between the third and the fourth magnetic layers, the first and the second intermediate layers being nonmagnetic. The first and the second strain sensing devices, and the barycenter are in a straight line.
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Citations
10 Claims
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1. A pressure sensor comprising:
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a base; a first sensor unit provided on the base; a second sensor unit provided at a location on the base different from a location of the first sensor unit; the first sensor unit including; a first transducer thin film having a first membrane surface, the first transducer thin film being flexible; a first strain sensing device provided at a location on the first membrane surface different from a location of a barycenter of the first membrane surface, the first strain sensing device including a first magnetic layer, a second magnetic layer, and a first intermediate layer provided between the first magnetic layer and the second magnetic layer, the second sensor unit including; a second transducer thin film having a second membrane surface, the second transducer thin film being flexible; and a third strain sensing device provided on the second membrane surface, the third strain sensing device including a fifth magnetic layer, a sixth magnetic layer, and a third intermediate layer provided between the fifth magnetic layer and the sixth magnetic layer, the third intermediate layer being nonmagnetic, a width of the second transducer thin film passing through a barycenter of the second membrane surface of the second transducer thin film along a direction parallel with the second membrane surface being different from a width of the first transducer thin film passing through the barycenter of the first membrane surface of the first transducer thin film along a direction parallel with the first membrane surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A microphone comprising a pressure sensor including:
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a base;
a first sensor unit provided on the base,a second sensor unit provided at a location on the base different from a location of the first sensor unit; the first sensor unit including; a first transducer thin film having a first membrane surface, the first transducer thin film being flexible; a first strain sensing device provided at a location on the first membrane surface different from a location of a barycenter of the first membrane surface, the first strain sensing device including a first magnetic layer, a second magnetic layer, and a first intermediate layer provided between the first magnetic layer and the second magnetic layer, the second sensor unit including; a second transducer thin film having a second membrane surface, the second transducer thin film being flexible; and a third strain sensing device provided on the second membrane surface, the third strain sensing device including a fifth magnetic layer, a sixth magnetic layer, and a third intermediate layer provided between the fifth magnetic layer and the sixth magnetic layer, the third intermediate layer being nonmagnetic, a width of the second transducer thin film passing through a barycenter of the second membrane surface of the second transducer thin film along a direction parallel with the second membrane surface being different from a width of the first transducer thin film passing through the barycenter of the first membrane surface of the first transducer thin film along a direction parallel with the first membrane surface. - View Dependent Claims (10)
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Specification