Physical quantity sensor
First Claim
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1. A physical quantity sensor for detecting a physical quantity comprising:
- a first substrate having a first principal surface and a first backside surface;
a first element arranged on the first principal surface of the first substrate;
a second substrate having a second principal surface and a second backside surface;
a second element arranged on the second principal surface of the second substrate; and
a first wiring layer and a second wiring layer,wherein the first principal surface of the first substrate faces and contacts the second principal surface of the second substrate so that an accommodation space is provided between the first substrate and the second substrate,wherein the second substrate includes a first through hole, which penetrates the second substrate from the second backside surface and reaches the first element on the first principal surface,wherein the second substrate further includes a second through hole, which penetrates the second substrate from the second backside surface and reaches the second element on the second principal surface,wherein the second substrate further includes a first through hole electrode and a second through hole electrode,wherein the first through hole electrode is arranged in the first through hole via an insulation film, and the second through hole electrode is arranged in the second through hole via the insulation film,wherein the first wiring layer is electrically coupled with the first through hole electrode, and the second wiring layer is electrically coupled with the second through hole electrode,wherein the first element is a sensor element having a movable portion, which is disposed in the accommodation space,wherein the second element is a semiconductor integrated circuit for processing a signal from the sensor element or for controlling the sensor element, andwherein the second element faces the accommodation space.
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Abstract
A physical quantity sensor for detecting a physical quantity includes: a first substrate having a first physical quantity detection element; a second substrate having a second physical quantity detection element, wherein the second substrate contacts the first substrate; and an accommodation space disposed between the first substrate and the second substrate. The first physical quantity detection element is disposed in the accommodation space. The first physical quantity detection element is protected with the first substrate and the second substrate since the first physical quantity detection element is sealed in the accommodation space.
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Citations
14 Claims
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1. A physical quantity sensor for detecting a physical quantity comprising:
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a first substrate having a first principal surface and a first backside surface; a first element arranged on the first principal surface of the first substrate; a second substrate having a second principal surface and a second backside surface; a second element arranged on the second principal surface of the second substrate; and a first wiring layer and a second wiring layer, wherein the first principal surface of the first substrate faces and contacts the second principal surface of the second substrate so that an accommodation space is provided between the first substrate and the second substrate, wherein the second substrate includes a first through hole, which penetrates the second substrate from the second backside surface and reaches the first element on the first principal surface, wherein the second substrate further includes a second through hole, which penetrates the second substrate from the second backside surface and reaches the second element on the second principal surface, wherein the second substrate further includes a first through hole electrode and a second through hole electrode, wherein the first through hole electrode is arranged in the first through hole via an insulation film, and the second through hole electrode is arranged in the second through hole via the insulation film, wherein the first wiring layer is electrically coupled with the first through hole electrode, and the second wiring layer is electrically coupled with the second through hole electrode, wherein the first element is a sensor element having a movable portion, which is disposed in the accommodation space, wherein the second element is a semiconductor integrated circuit for processing a signal from the sensor element or for controlling the sensor element, and wherein the second element faces the accommodation space. - View Dependent Claims (2, 3, 4, 5)
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6. A physical quantity sensor for detecting a physical quantity comprising:
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a first substrate having a first principal surface and a first backside surface; a first element arranged on the first principal surface of the first substrate; a second substrate having a second principal surface and a second backside surface; a second element arranged on the second principal surface of the second substrate; and a first wiring layer, wherein the first principal surface of the first substrate faces and contacts the second backside surface of the second substrate so that an accommodation space is provided between the first substrate and the second substrate, wherein the second element on the second principal surface is opposite to the accommodation space, wherein the second substrate includes a first through hole, which penetrates the second substrate from the second principal surface and reaches the first element on the first principal surface, wherein the second substrate further includes a first through hole electrode, which is arranged in the first through hole via an insulation film, wherein the first wiring layer is electrically coupled with the first through hole electrode, wherein the first element is a sensor element having a movable portion, which is disposed in the accommodation space, wherein the second element is a semiconductor integrated circuit for processing a signal from the sensor element or for controlling the sensor element, and wherein the second element is disposed opposite to the accommodation space. - View Dependent Claims (7, 8, 9, 10)
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11. A physical quantity sensor for detecting a physical quantity comprising:
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a first substrate having a first principal surface and a first backside surface; a first element arranged on the first principal surface of the first substrate; a second substrate having a second principal surface and a second backside surface; a second element arranged on the second principal surface of the second substrate; and a first wiring layer and a second wiring layer, wherein the first principal surface of the first substrate faces and contacts the second principal surface of the second substrate so that an accommodation space is provided between the first substrate and the second substrate, wherein the second substrate includes a first through hole, which penetrates the second substrate from the second backside surface and reaches the first element on the first principal surface, wherein the second substrate further includes a second through hole, which penetrates the second substrate from the second backside surface and reaches the second element on the second principal surface, wherein the second substrate further includes a first through hole electrode and a second through hole electrode, wherein the first through hole electrode is arranged in the first through hole via an insulation film, and the second through hole electrode is arranged in the second through hole via the insulation film, wherein the first wiring layer is electrically coupled with the first through hole electrode, and the second wiring layer is electrically coupled with the second through hole electrode, wherein the first element is a sensor element having a movable portion, which is disposed in the accommodation space, wherein the second element is a semiconductor integrated circuit for processing a signal from the sensor element or for controlling the sensor element, wherein the first substrate is a SOI substrate having an embedded insulation film, wherein the movable portion includes a movable electrode, which is movable in the accommodation space along with a direction parallel to the first principal surface of the first substrate in accordance with the physical quantity applied to the sensor, wherein the sensor element further includes a fixed electrode, which faces the movable electrode, wherein the movable electrode and the fixed electrode provide a capacitor therebetween, and wherein the physical quantity is detected based on a capacitance of the capacitor. - View Dependent Claims (12)
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13. A physical quantity sensor for detecting a physical quantity comprising:
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a first substrate having a first principal surface and a first backside surface; a first element arranged on the first principal surface of the first substrate; a second substrate having a second principal surface and a second backside surface; a second element arranged on the second principal surface of the second substrate; and a first wiring layer, wherein the first principal surface of the first substrate faces and contacts the second backside surface of the second substrate so that an accommodation space is provided between the first substrate and the second substrate, wherein the second element on the second principal surface is opposite to the accommodation space, wherein the second substrate includes a first through hole, which penetrates the second substrate from the second principal surface and reaches the first element on the first principal surface, wherein the second substrate further includes a first through hole electrode, which is arranged in the first through hole via an insulation film, wherein the first wiring layer is electrically coupled with the first through hole electrode, wherein the first element is a sensor element having a movable portion, which is disposed in the accommodation space, wherein the second element is a semiconductor integrated circuit for processing a signal from the sensor element or for controlling the sensor element, wherein the first substrate is a SOI substrate having an embedded insulation film, wherein the movable portion includes a movable electrode, which is movable in the accommodation space along with a direction parallel to the first principal surface of the first substrate in accordance with the physical quantity applied to the sensor, wherein the sensor element further includes a fixed electrode, which faces the movable electrode, wherein the movable electrode and the fixed electrode provide a capacitor therebetween, and wherein the physical quantity is detected based on a capacitance of the capacitor. - View Dependent Claims (14)
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Specification