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对CMOS兼容的Pirani仪表进行理论和实验研究,并采用温度补偿模型
Shizhen Xu1, Gai Yang1, Junfu Chen1
1The School of Integrated Circuits and Electronics, Beijing Institute of Technology, 100081, Beijing, China.
Microsystems & nanoengineering
|January 22, 2025
概括
一个新的CMOS兼容的Pirani真空仪利用表面微加工和温度补偿来提高灵敏度和稳定性. 这种先进的真空传感器提供了较低的检测极限,使其适用于苛刻的应用.
科学领域:
- 微电子机械系统 (MEMS) 是一种微电子机械系统.
- 真空技术 真空技术
- 传感器技术 传感器技术
背景情况:
- 传统的Pirani仪表在灵敏度,检测极限和高温性能方面面临限制.
- 在将真空传感与微电子系统集成时,CMOS兼容性至关重要.
研究的目的:
- 开发一种CMOS兼容的Pirani真空仪,其灵敏度提高,检测极限较低,高温稳定性高.
- 调查设备几何和操作模式对性能的影响.
- 建立一个理论模型来预测和补偿性能变化.
主要方法:
- 使用1微米间隙的表面微加工制造T型Pirani标尺.
- 有限元分析 (FEA) 模拟用于研究加热器温度和环境温度的影响.
- 一个半经验理论模型的推导,用于性能预测和补偿.
- 灵敏度,温度补偿,稳定性,低噪声和检测极限的实验性表征.
主要成果:
- 这种T型装置的平均灵敏度为1.10V/lgPa,是L型装置的2.89倍.
- 温度补偿策略在整个温度范围内有效控制了2.5%的误差.
- 该设备显示了低噪声底线 (384 μVrms) 和0.07 Pa @ 1 Hz的检测极限.
结论:
- 开发的CMOS兼容的Pirani真空计提供了显著增强的性能指标.
- 实施的温度补偿策略确保在不同的环境温度下可靠运行.
- 该设备的特性证实其适用于实际真空测量应用的适用性.
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