Pressure sensor and manufacturing method of the same
First Claim
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1. A pressure sensor for detecting pressure comprising:
- a metallic diaphragm for receiving the pressure;
four strain gauges providing a Wheatstone bridge, wherein each strain gauge outputs an electric signal corresponding to deformation of the diaphragm when the diaphragm is deformed by the pressure; and
four semiconductor chips corresponding to four strain gauges, wherein each strain gauge is disposed in the semiconductor chip, wherein,each semiconductor chip is mounted on the diaphragm.
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Abstract
A pressure sensor for detecting pressure includes: a metallic diaphragm for receiving the pressure; four strain gauges providing a Wheatstone bridge, wherein each strain gauge outputs an electric signal corresponding to deformation of the diaphragm when the diaphragm is deformed by the pressure; and four semiconductor chips corresponding to four strain gauges, wherein each strain gauge is disposed in the semiconductor chip. Each semiconductor chip is mounted on the diaphragm.
27 Citations
26 Claims
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1. A pressure sensor for detecting pressure comprising:
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a metallic diaphragm for receiving the pressure; four strain gauges providing a Wheatstone bridge, wherein each strain gauge outputs an electric signal corresponding to deformation of the diaphragm when the diaphragm is deformed by the pressure; and four semiconductor chips corresponding to four strain gauges, wherein each strain gauge is disposed in the semiconductor chip, wherein, each semiconductor chip is mounted on the diaphragm. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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2. A pressure sensor for detecting pressure comprising:
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a metallic diaphragm for receiving the pressure; four strain gauges providing a Wheatstone bridge, wherein each strain gauge outputs an electric signal corresponding to deformation of the diaphragm when the diaphragm is deformed by the pressure; a semiconductor chip, wherein a part of the four strain gauges is disposed in the semiconductor chip; and a substrate having a signal processor for processing the electric signals outputted from the four strain gauges, wherein a rest part of the four strain gauges is disposed in the substrate, wherein only the semiconductor chip is mounted on the diaphragm. - View Dependent Claims (3)
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4. A pressure sensor for detecting pressure comprising:
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a metallic diaphragm for receiving the pressure; four strain gauges providing a Wheatstone bridge, wherein each strain gauge outputs an electric signal corresponding to deformation of the diaphragm when the diaphragm is deformed by the pressure; a first semiconductor chip, wherein two of the four strain gauges are disposed in the first semiconductor chip; and a second semiconductor chip, wherein other two of the four strain gauges are disposed in the second semiconductor chip, wherein the first and second semiconductor chips are mounted on the diaphragm.
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5. A pressure sensor for detecting pressure comprising:
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a metallic diaphragm for receiving the pressure; four strain gauges providing a Wheatstone bridge, wherein each strain gauge outputs an electric signal corresponding to deformation of the diaphragm when the diaphragm is deformed by the pressure; a first semiconductor chip, wherein one of the four strain gauges is disposed in the first semiconductor chip; and a second semiconductor chip, wherein other three of the four strain gauges are disposed in the second semiconductor chip, wherein the first and second semiconductor chips are mounted on the diaphragm.
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6. A pressure sensor for detecting pressure comprising:
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a metallic diaphragm for receiving the pressure; four strain gauges providing a Wheatstone bridge, wherein each strain gauge outputs an electric signal corresponding to deformation of the diaphragm when the diaphragm is deformed by the pressure; a first semiconductor chip, wherein two of the four strain gauges is disposed in the first semiconductor chip; a second semiconductor chip, wherein another one of the four strain gauges is disposed in the second semiconductor chip; and a third semiconductor chip, wherein a last one of the four strain gauges is disposed in the third semiconductor chip, wherein the first to third semiconductor chips are mounted on the diaphragm.
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Specification