The packaging structure of SOI high-temperature pressure sensors is an important factor affecting its stable operation in high-temperature environments. In this paper, based on an SOI chip, inorganic high-emperature adhesive, epoxy resin and glass paste were used as packaging and bonding materials, and three high-temperature pressure sensors were prepared from each material. After a 300 ℃@100 h online test, the results showed that the average zero output drift of the high-temperature pressure sensor prepared by inorganic high-temperature adhesive, epoxy resin and glass paste was about 0.019 05, 1.649 65 and 0.066 93 mV/h, within 300 ℃@100 h, respectively. The average integrated repeatability, hysteresis and linearity were 1.062%, 4.932% and 1.857%, respectively. The experimental results show that the smaller the coefficient of thermal expansion, the smaller the influence on the output performance of the sensor at high temperatures.
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