On possibility to extend the operation temperature range of SOI sensors with polysilicon piezoresistors

Abstract

The aim of this work was to study the possibilities of developing mechanical sensors with poly-Si piezoresistors on insulating substrate for operation in different temperature ranges (low, elevated and high temperatures). Laser recrystallization is used as a technological tool to adjust the electrical and piezoresistive parameters of the polysilicon layer. For this purpose a set of studies including numerical simulation and experimental work has been carried out. The main three directions of the studies are considered: problems of thermal stabilization of the pressure sensor performance at elevated and high temperatures; problem of sensor operation at cryogenic temperatures; development of a multifunctional pressure-temperature sensor.