Abstract

We report here the development of a simple and low-cost intelligent vacuum sensor based on multipurpose thermopile MEMS chips. Our devices have a p+Si heater and two thermopiles with 30 p+Si/Al thermocouples each. Thermal and electrical isolation is provided by a sandwich membrane (residual n-Si and sputtered oxide). The sensor utilizes for its intelligent mode of operation a modified version of an existing processing module we developed for our piezoresistive sensors.

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