CMOS Integrated Gas Sensors

Authored by: Prasanta K. Guha , Sumita Santra , Julian W. Gardner

Measurement, Instrumentation, and Sensors Handbook

Print publication date:  February  2014
Online publication date:  February  2014

Print ISBN: 9781439848913
eBook ISBN: 9781439848937
Adobe ISBN:

10.1201/b15664-11

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Abstract

This chapter provides a comprehensive discussion on the necessity and importance of developing gas sensors on a low-cost complementary metal oxide semiconductor (CMOS) platform technology. The main focus is on the challenges of integrating microhotplate-based gas sensors into a standard CMOS process: microhotplate-based sensors typically operate at much higher temperatures of 200 °C–500 °C. This is beyond the normal limit of CMOS operation at +125 °C. The chapter focuses on both different on-chip circuit schemes to interface these microhotplate-based sensors and also the challenges associated with depositing/growing nanosensing materials (particularly carbon nanotubes [CNTs] and graphene) on a CMOS platform. Finally, there is a brief discussion on the existing gas sensor market and its future outlook.

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