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MEMS-Capacitive Pressure Sensor Fabricated Using Printed-Circuit-Processing Techniques

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2 Author(s)
Palasagaram, J.N. ; Gen. Electr. Co. Health Care, Aurora, OH ; Ramadoss, R.

Microelectromechanical systems (MEMS)-based capacitive pressure sensors are typically fabricated using silicon-micromachining techniques. In this paper, a novel liquid-crystal polymer (LCP)-based MEMS-capacitive pressure sensor, fabricated using printed-circuit-processing technique, is reported. The pressure sensor consists of a cylindrical cavity formed by a sandwich of an LCP substrate, an LCP spacer layer with circular holes, and an LCP top layer. The bottom electrode and the top electrode of the capacitive pressure sensor are defined on the top side of the LCP substrate and the bottom side of the top-LCP layer, respectively. An example pressure sensor with a diaphragm radius of 1.6 mm provides a total capacitance change of 0.277 pF for an applied pressure in the range of 0-100 kPa

Published in:

Sensors Journal, IEEE  (Volume:6 ,  Issue: 6 )

Date of Publication:

Dec. 2006

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