{"title":"纳米电沉积的定向电容式MEMS传声器","authors":"Sang-Soo Je, Jeonghwan Kim, M. Kozicki, J. Chae","doi":"10.1109/MEMSYS.2009.4805328","DOIUrl":null,"url":null,"abstract":"We present an in-situ non-volatile tuning method for adjusting MEMS microphone sensitivity using integrated nano-electrodeposits to achieve high directionality in hearing aids. Using a DC bias at room temperature, nano-electrodeposits are electrochemically formed on a Ag-Ge-Se solid electrolyte film integrated with a microphone diaphragm. The in-situ growth mechanism generates mass/stress redistribution on the diaphragm, tuning microphone sensitivity to incoming acoustic sources. Acoustic measurements demonstrate the technique can achieve a tuning range of 1.67 dB (24%), corresponding to a 1.17-dB Directivity Index (DI) improvement, which is sufficient to enable acoustic directionality in high accuracy microphone arrays.","PeriodicalId":187850,"journal":{"name":"2009 IEEE 22nd International Conference on Micro Electro Mechanical Systems","volume":"171 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2009-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":"{\"title\":\"A Directional Capacitive MEMS Microphone using Nano-Electrodeposits\",\"authors\":\"Sang-Soo Je, Jeonghwan Kim, M. Kozicki, J. Chae\",\"doi\":\"10.1109/MEMSYS.2009.4805328\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We present an in-situ non-volatile tuning method for adjusting MEMS microphone sensitivity using integrated nano-electrodeposits to achieve high directionality in hearing aids. Using a DC bias at room temperature, nano-electrodeposits are electrochemically formed on a Ag-Ge-Se solid electrolyte film integrated with a microphone diaphragm. The in-situ growth mechanism generates mass/stress redistribution on the diaphragm, tuning microphone sensitivity to incoming acoustic sources. Acoustic measurements demonstrate the technique can achieve a tuning range of 1.67 dB (24%), corresponding to a 1.17-dB Directivity Index (DI) improvement, which is sufficient to enable acoustic directionality in high accuracy microphone arrays.\",\"PeriodicalId\":187850,\"journal\":{\"name\":\"2009 IEEE 22nd International Conference on Micro Electro Mechanical Systems\",\"volume\":\"171 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2009-03-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2009 IEEE 22nd International Conference on Micro Electro Mechanical Systems\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/MEMSYS.2009.4805328\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 IEEE 22nd International Conference on Micro Electro Mechanical Systems","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/MEMSYS.2009.4805328","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A Directional Capacitive MEMS Microphone using Nano-Electrodeposits
We present an in-situ non-volatile tuning method for adjusting MEMS microphone sensitivity using integrated nano-electrodeposits to achieve high directionality in hearing aids. Using a DC bias at room temperature, nano-electrodeposits are electrochemically formed on a Ag-Ge-Se solid electrolyte film integrated with a microphone diaphragm. The in-situ growth mechanism generates mass/stress redistribution on the diaphragm, tuning microphone sensitivity to incoming acoustic sources. Acoustic measurements demonstrate the technique can achieve a tuning range of 1.67 dB (24%), corresponding to a 1.17-dB Directivity Index (DI) improvement, which is sufficient to enable acoustic directionality in high accuracy microphone arrays.
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