Sensors (Apr 2020)

Crosstalk Analysis of a CMOS Single Membrane Thermopile Detector Array

  • Ying Dai,
  • Syed Zeeshan Ali,
  • Richard Hopper,
  • Claudio Falco,
  • Prakash Pandey,
  • Chris Oxley,
  • Daniel Popa,
  • Florin Udrea

DOI
https://doi.org/10.3390/s20092573
Journal volume & issue
Vol. 20, no. 9
p. 2573

Abstract

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We present a new experimental technique to characterise the crosstalk of a thermopile-based thermal imager, based on bi-directional electrical heating of thermopile elements. The new technique provides a significantly simpler and more reliable method to determine the crosstalk, compared to a more complex experimental setup with a laser source. The technique is used to characterise a novel single-chip array, fabricated on a single dielectric membrane. We propose a theoretical model to simulate the crosstalk, which shows good agreement with the experimental results. Our results allow a better understanding of the thermal effects in these devices, which are at the center of a rising market of industrial and consumer applications.

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