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Screen-Grid Field Effect Transistor for sensing Bio-Molecules

Published online by Cambridge University Press:  31 January 2011

Kwee Guan Eng,
Kristel Fobelets and
Enrique Velazquez-Perez
Kwee Guan Eng
Affiliation:
engkg24@yahoo.com.sg, Imperial College London, Electrical and Electronic Engineering, London, United Kingdom
Kristel Fobelets
Affiliation:
k.fobelets@imperial.ac.uk, Imperial College London, Electrical and Electronic Engineering, London, United Kingdom
Enrique Velazquez-Perez
Affiliation:
js@usal.es, Universidad de Salamanca, Departmento de Física Aplicada, Salamanca, Spain
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Abstract

A novel field effect transistor, based on the Screen Grid Field Effect Transistor concept, is proposed with an integrated Coulter Counter pore for amplification of the sensing signal. 3D TCAD simulations are performed on the use of the Coulter Counter Field Effect Transistor (CCFET) to detect the Influenza A virus. The gate of the transistor is the pore through which the bioparticles pass. This passage causes a change in the electrostatic conditions of the gate and thus changes the source-drain current, similar to ISFET operation. The structure of the CC-FET is optimised for bio-sensing and multi-particle passage through the gate hole is simulated. TCADresults show that the CC-FET is capable of multi-particle and particle size detection.

Keywords

sensornanostructuremicroelectronics

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