Low pressure sensor device with high accuracy and high...

Measuring and testing – Fluid pressure gauge – Diaphragm

Reexamination Certificate

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Reexamination Certificate

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07997142

ABSTRACT:
Pressure non-linearity in a low pressure sensor device formed from a silicon diaphragm with an embedded piezoresistive transducer is reduced by using a shallow boss or thin stiffener on an ultra-thin diaphragm while the pressure sensitivity of the device is increased with corner trenches.

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J. A. Chiou, S. Chen, “Pressure Nonlinearity of Micromachined Piezoresistive Pressure Sensors with Thin Diaphragms under High Residual Stresses”, Sensors and Actuators A: Physical, vol. 147, pp. 332-339., 2008.
ELMOS-SMI Pressure Sensor Device, ELMOS Semiconductor AG (MEMS Sensors) website, date unknown.

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