期刊
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
卷 26, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0960-1317/26/2/025005
关键词
accelerometer; serpentine beam; pre-buried mask; sandwich; silicon pillar structure
类别
资金
- National Natural Science Foundation of China (NSFC) [51175506, 51005239]
This paper presents a novel differential capacitive silicon micro-accelerometer with symmetrical double-sided serpentine beam-mass sensing structure and glass-silicon-glass sandwich structure. The symmetrical double-sided serpentine beam-mass sensing structure is fabricated with a novel pre-buried mask fabrication technology, which is convenient for manufacturing multi-layer sensors. The glass-silicon-glass sandwich structure is realized by a double anodic bonding process. To solve the problem of the difficulty of leading out signals from the top and bottom layer simultaneously in the sandwich sensors, a silicon pillar structure is designed that is inherently simple and low-cost. The prototype is fabricated and tested. It has low noise performance (the peak to peak value is 40 mu g) and mu g-level Allan deviation of bias (2.2 mu g in 1 h), experimentally demonstrating the effectiveness of the design and the novel fabrication technology.
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