A batch-processed vacuum-sealed capacitive pressure sensor

被引:0
|
作者
Chavan, AV
Wise, KD
机构
关键词
vacuum sealing; capacitive sensor; pressure;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper reports a multi-transducer vacuum-sealed capacitive barometric pressure sensor. The device operates with a resolution of 25mTorr over a pressure range from 600 to 800 Torr. The sensitivity is 27fF/Torr (3000ppm/Torr). The TCO at 750 Torr is 3969ppm/degrees C and the TCS is about 1000ppm/degrees C. The device uses a single layer of polysilicon both for sealing to the glass and for transfer of the glass electrode in the reference cavity to the outside world. The device is read out using a switched-capacitor charge integrator and an on-chip compensation capacitor.
引用
收藏
页码:1449 / 1452
页数:4
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