Zhang Feng-Tian, Tang Zhen-An, Yu Jun. A Constant Temperature Thermal Vacuum Sensor Based on Micro-hotplate[J]. Optics and precision engineering, 2008, 16(7): 1253-1257.
Zhang Feng-Tian, Tang Zhen-An, Yu Jun. A Constant Temperature Thermal Vacuum Sensor Based on Micro-hotplate[J]. Optics and precision engineering, 2008, 16(7): 1253-1257.DOI:
Micro-hotplate(MHP) is widely used in various of microsensors. Based on the thermal analysis of MHP
this paper analysed theoretically the effects of working temperature and dimensions on the working characteristics of micro-hotplate-based thermal vacuum sensor at constant temperature. A thermal vacuum sensor based on micro-hotplate was designed in which the supporting beams were 65μm long and 21μm wide
the gas gap below micro-hotplate was 0.5μm. The micro sensor was fabricated successfully with surface micromachining technology. The measured results shew that the fabricated vacuum sensor was sensitive in the pressure range of 2Pa~105Pa and the sensor response characteristics were in consistent with the calculated theoretical results.