The electret telephone transmitter
نویسندگان
چکیده
منابع مشابه
Micro Electret Power Generator
We present the first micromachined rotational electret power generator, linearized theoretical model of electret power generation, and novel method to produce uniformly charged electret. We also improved our previously developed [ I , 21 thin film Teflon AF 1601-S electret technology with respect to dielectric thickness, charge uniformity, and processability. In demonstration, our prototype pow...
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A new type of electrostatic microgenerator is presented that converts mechanical microvibrational energy into electric energy. The energy conversion mechanism is as follows. External microvibrations are transmitted to the device frame. The thin electret layer sputtered to the silicon substrate surface was fixed on the frame and the moving electrode was fixed by a weak suspension and comes into ...
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An electret power generator is developed using a new electret made of a charged parylene HT R © thin-film polymer. Here, parylene HT R © is a room-temperature chemical-vapor-deposited thin-film polymer that is MEMS and CMOS compatible. With corona charge implantation, the surface charge density of parylene HT R © is measured as high as 3.69 mC m−2. Moreover, it is found that, with annealing at ...
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Electrets are polymeric discs that carry semi permanent electrostatic charge. These provide electrostatic potentials in the range of 500 to 3,000 V. In the current work, the effect of electret exposure on the skin permeability was investigated. Transdermal transport studies were carried out across porcine epidermis in Franz diffusion cells. Salicylic acid, fluorescein labeled dextrans (FD) and ...
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In this pa er we describe a process for the micromachining of materials like Teflon-FEP. We have used photolithography and plasma etching, by which electrets can be etched selemvely. The advantages of, in such a way micromachined electrets are numerous. Miniature sensors like microphones and pressure sensors, containi6 local areas with Teflon, have been realized in our laboratones. The process ...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1981
ISSN: 0001-4966
DOI: 10.1121/1.385980