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SingleChip Condenser Miniature Microphone (单片机冷凝器微型麦克风)
SINGLE-CHIP CONDENSER MINIATURE MICROPHONE WITH A HIGH SENSITIVE
CIRCULAR CORRUGATED DIAPHRAGM
1 1 1 1 1 2
Jing Chen , Litian Liu , Zhijian Li , Zhimin Tan , Yang Xu and Jun Ma
1Institute of Microelectronics, Tsinghua University, Beijing, 100084, P. R. China
2Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100080, P. R. China
ABSTRACT circular corrugated diaphragm was proposed and
developed. The fabrication process revealed high yield,
A novel single-chip condenser miniature microphone with allowing a low cost production of high performance
a circular corrugated diaphragm for residual stress microphones capable of on-chip integration of signal
releasing has been proposed, fabricated and tested. The processing electronics.
condenser microphone consists of a rigid single-crystal
backplate and a flexible circular corrugated diaphragm STRUCTURE AND FABRICATION
using induced couple plasma(ICP) etching. An
electrostatic-structural coupling finite element
The diaphragm-based structures can be realized in one
analysis(FEA) was performed for design optimization. A
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