access icon free Structured diaphragm with a centre boss and four peninsulas for high sensitivity and high linearity pressure sensors

Using the structured diaphragm with a centre boss and four peninsulas (CBP structure), a high sensitivity and high linearity pressure sensor for low pressure ranges was demonstrated. The finite element analysis indicated that the CBP structure could achieve a far better performance than other typical structures for low pressure applications. In accordance with the simulation, the fabricated pressure sensor showed a sensitivity of 21.0 mV/V full-scale output and a nonlinearity error of 0.15% full-scale span in the pressure range of 0–5 kPa. The sensors with the CBP structure are potentially a better choice for measuring low pressures.

Inspec keywords: diaphragms; pressure measurement; measurement errors; pressure sensors; microsensors; finite element analysis

Other keywords: nonlinearity error; structured diaphragm; CBP structure; centre boss and peninsulas; MEMS pressure sensor fabrication; hnite element analysis; low pressure applications; pressure 0 kPa to 5 kPa; pressure measurement

Subjects: Finite element analysis; Numerical approximation and analysis; Microsensors and nanosensors; Pressure and vacuum measurement; Sensing and detecting devices; Pressure measurement; Micromechanical and nanomechanical devices and systems

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http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2014.0154
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