Microfabricated photoplastic cantilever with integrated photoplastic/carbon based piezoresistive strain sensor

descriptionPublicationkeyboard_double_arrow_right Article 13 Mar 2006 Denmark English Publisher:AIP PublishingJournal:Applied Physics Letters, volume 88 (issn: 0003-6951, eissn: 1077-3118,

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Authors: Gammelgaard, Lauge; Rasmussen, Peter Andreas; Calleja, M.; Vettiger, P.; Boisen, Anja;

doi: 10.1063/1.2186396

handle: 10261/17952

Microfabricated photoplastic cantilever with integrated photoplastic/carbon based piezoresistive strain sensor

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Abstract

We present an SU-8 micrometer sized cantilever strain sensor with an integrated piezoresistor made of a conductive composite of SU-8 polymer and carbon black particles. The composite has been developed using ultrasonic mixing. Cleanroom processing of the polymer composite has been investigated and it has been shown that it is possible to pattern the composite by standard UV photolithography. The composite material has been integrated into an SU-8 microcantilever and the polymer composite has been demonstrated to be piezoresistive with gauge factors around 15–20. Since SU-8 is much softer than silicon and the gauge factor of the composite material is relatively high, this polymer based strain sensor is more sensitive than a similar silicon based cantilever sensor.

Country

Denmark

Related Organizations

Technical University of Denmark
Denmark

Keywords

Cantilevers, ultraviolet lithography, piezoresistive devices, strain sensors, polymers, microsensors

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