MEMS accelerometer with proof masses moving in an anti-phase direction
First Claim
1. A sensor comprising:
- a substrate; and
a mechanical structure, wherein the mechanical structure includes;
at least two proof masses including a first proof mass and a second proof mass;
a flexible coupling between the at least two proof masses and the substrate; and
a transducer for measuring motion in a direction normal and parallel to a plane of the substrate of the mechanical structure relative to the substrate,wherein the at least two proof masses move in an anti-phase direction normal to the plane of the substrate in response to acceleration of the sensor normal to the plane and move in anti-phase in a direction parallel to the plane of the substrate in response to an acceleration of the sensor parallel to the plane, and wherein the transducer is a capacitive sensor.
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Abstract
A sensor is disclosed. The sensor includes a substrate and a mechanical structure. The mechanical structure includes at least two proof masses including a first proof mass and a second proof mass. The mechanical structure also includes a flexible coupling between the at least two proof masses and the substrate. The at least two proof masses move in an anti-phase direction normal to the plane of the substrate in response to acceleration of the sensor normal to the plane and move in anti-phase in a direction parallel to the plane of the substrate in response to an acceleration of the sensor parallel to the plane. The at least two proof masses move in a direction parallel to the plane of the substrate in response to an acceleration of the sensor parallel to the plane.
5 Citations
21 Claims
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1. A sensor comprising:
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a substrate; and a mechanical structure, wherein the mechanical structure includes; at least two proof masses including a first proof mass and a second proof mass; a flexible coupling between the at least two proof masses and the substrate; and a transducer for measuring motion in a direction normal and parallel to a plane of the substrate of the mechanical structure relative to the substrate, wherein the at least two proof masses move in an anti-phase direction normal to the plane of the substrate in response to acceleration of the sensor normal to the plane and move in anti-phase in a direction parallel to the plane of the substrate in response to an acceleration of the sensor parallel to the plane, and wherein the transducer is a capacitive sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A sensor comprising:
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a substrate; and a mechanical structure, wherein the mechanical structure includes; at least two proof masses including a first proof mass and a second proof mass, a flexible coupling between the at least two proof masses and the substrate; and a transducer for measuring motion in a direction normal and parallel to a plane of the substrate of the mechanical structure relative to the substrate, wherein the at least two proof masses move in an anti-phase direction normal to the plane of the substrate in response to acceleration of the sensor normal to the plane and move in anti-phase in a direction parallel to the plane of the substrate in response to an acceleration of the sensor parallel to the plane, wherein the at least two proof masses move in a direction parallel to the plane of the substrate in response to an acceleration of the sensor parallel to the plane, and wherein the transducer is a capacitive sensor. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification