Design and simulation of polymer piezo-electric MEMS microphone

Author(s):  
Y.C. Muralidhar ◽  
K.N Neethu ◽  
Veda Sandeep Nagaraja ◽  
S.L. Pinjare
Author(s):  
J.A. Eades ◽  
A. van Dun

The measurement of magnification in the electron microscope is always troublesome especially when a goniometer stage is in use, since there can be wide variations from calibrated values. One elegant method (L.M.Brown, private communication) of avoiding the difficulties of standard methods would be to fit a device which displaces the specimen a small but known distance and recording the displacement by a double exposure. Such a device would obviate the need for changing the specimen and guarantee that the magnification was measured under precisely the conditions used.Such a small displacement could be produced by any suitable transducer mounted in one of the specimen translation mechanisms. In the present case a piezoelectric crystal was used. Modern synthetic piezo electric ceramics readily give reproducible displacements in the right range for quite modest voltages (for example: Joyce and Wilson, 1969).


2019 ◽  
Vol 139 (11) ◽  
pp. 383-384
Author(s):  
Naoki Okada ◽  
Koudai Suzuki ◽  
Takashi Mineta

2021 ◽  
Author(s):  
Biswajit Mahanty ◽  
Sujoy Kumar Ghosh ◽  
Kuntal Maity ◽  
KRITTISH ROY ◽  
Subrata Sarkar ◽  
...  

In this work, an all-fiber pyro- and piezo-electric nanogenerator (PPNG) is designed by multiwall carbon nanotube (MWCNT) doped poly(vinylidene fluoride) (PVDF) electrospun nanofibers as the active layer and interlocked conducting...


Author(s):  
J. Citakovic ◽  
P.F. Hovesten ◽  
G. Rocca ◽  
A. van Halteren ◽  
P. Rombach ◽  
...  
Keyword(s):  

2008 ◽  
Vol 309 (1-2) ◽  
pp. 276-292 ◽  
Author(s):  
Jian Liu ◽  
David T. Martin ◽  
Karthik Kadirvel ◽  
Toshikazu Nishida ◽  
Louis Cattafesta ◽  
...  

Author(s):  
Ganesh Iyer ◽  
Wei Li ◽  
Lavanya Gopalakrishnan

Microphone is a critical component for seamless communication converting an acoustic signal (vocal) to an electrical signal. Traditionally Electrets Condenser Microphones (ECM) have been the primary proponent of audio component in many consumer products. With functionally rich consumer devices (example smart phones, etc) there is a growing trend to look at components with higher functionality but a smaller form factor. Microelectronic Mechanical Systems (MEMS) microphone is seen as a possible replacement to ECM due to its significant reduction in form fit with additional functionality. The paper is an effort to illustrate steps that can be considered while designing MEMS microphone in a system. This includes Design considerations, Reliability tests, Manufacturing challenges and Readiness to ensure higher yield during the final assembly. Manufacturing issues (Top 5) and guideline presented in the paper are not just to increase the assembly yield (system level), but also to increase an awareness upfront to the design phase to help create a robust system/product.


Author(s):  
Y. Zhang ◽  
R. Bauer ◽  
W.M. Whitmer ◽  
W.O. Brimijoin ◽  
D. Uttamchandani ◽  
...  

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