共查询到19条相似文献,搜索用时 63 毫秒
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基于MEMS技术的微型燃料电池的制作 总被引:3,自引:0,他引:3
提出一套基于MEMS加工技术和薄膜淀积技术的硅基微型直接甲醇燃料电池的制作工艺流程。该微型燃料电池采用KOH体硅腐蚀技术得到流体通道,并溅射金属Pt层作为收集电流的电极。采用PDMS将两块带有微通道的燃料电池硅片与涂有催化剂层的质子交换膜密封粘合。制作得到的微型燃料电池单元的流道有效尺寸为:8 6mm×8 6mm。室温常压下,单电池的开路输出电压为0 4V左右。当输出电压为0 21V时,达到最大输出功率15 6μW(21 1μW/cm2)。 相似文献
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军用MEMS技术研究的最新进展 总被引:1,自引:0,他引:1
本文讨论了美国陆军航空兵和导弹部队司令部(AMCOM)正在开发研究的微机电系统(MEMS)技术的最新进展。近年来,工业用低成本、低功率微型器件(从简单的温度计、压力传感器到内胎加速度计)目前技术的成熟水平已为开发研究军民两用MEMS器件奠定了坚实基础。AMCOM早期从事的MEMS技术开发着重于惯性MEMS传感器,但最近启动了一项新的陆军(联合)科学和技术目标(STO)研究项目,目的是研究开发具有中等角频率传感器分辨率且低成本的惯性组件,用于测量导弹姿态的偏航角和旋转滚动速率。这项举措极大地影响了美国国防先进研究计划署(DARPA)和其他政府部门,使其致力于研究开发坚固耐用的实验性惯性MEMS器件。在过去的2年中,AMCOM的MEMS研究范围不断地扩大,包括了用于导弹正常状况监测的环境MEMS传感器、射频MEMS器件、用于光束方向控制的光学MEMS器件以及用于光电子器件微型化的微光学“光具座”等多个项目。此外,MEMS封装和集成也成为人们关注的焦点。本文有选择地描述了这些领域中正在进行的研究项目,并给出某些军用MEMS传感器的技术要求。 相似文献
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基于压电效应的MEMS振动式微能源器件 总被引:1,自引:0,他引:1
设计了一种硅基压电功能材料的四悬臂梁-中心质量块结构MEMS振动式微能源器件,可将环境振动能量有效转化为电能。采用溶胶-凝胶法制备硅基锆钛酸铅(PbZr0.53Ti0.47O3,PZT)压电功能薄膜,经干/湿法刻蚀和溅射沉积等MEMS工艺实现器件功能结构的制备。研制的器件整体结构尺寸为7 000μm×7 000μm×300μm,单个PZT压电单元面积为0.149 6 mm2。将悬臂梁上4个压电单元串联以实现输出最大化,测试结果表明,器件的谐振频率为300 Hz,适于低频振动环境;输出电压在一定范围内随加速度增加而增大;在加速度为10 g时压电单元单位面积输出电压达1.19 mV/mm2。 相似文献
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Fabrication and performance of MEMS-based piezoelectric power generator for vibration energy harvesting 总被引:4,自引:0,他引:4
Hua-Bin Fang Jing-Quan Liu Zheng-Yi Xu Li Wang Bing-Chu Cai 《Microelectronics Journal》2006,37(11):1280-1284
A MEMS-based energy harvesting device, micro piezoelectric power generator, is designed to convert ambient vibration energy to electrical power via piezoelectric effect. In this work, the generator structure of composite cantilever with nickel metal mass is devised. Micro-electronic-mechanical systems (MEMS) related techniques such as sol-gel, RIE dry etching, wet chemical etching, UV-LIGA are developed to fabricate the device and then its performance is measured on vibration testing setup. The investigation shows that the designed device is expected to resonantly operate in low-frequency environmental vibration through tailoring the structure dimension. Under the resonant operation with frequency of about 608 Hz, a first prototype of the generator result in about 0.89 V AC peak-peak voltage output to overcome germanium diode rectifier toward energy storage, and its power output is in microwatt level of 2.16 μW. 相似文献
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Jing-Quan Liu Hua-Bin Fang Zheng-Yi Xu Xin-Hui Mao Xiu-Cheng Shen Di Chen Hang Liao Bing-Chu Cai 《Microelectronics Journal》2008,39(5):802-806
Piezoelectric power generator made by microelectromechanical system (MEMS) technology can scavenge power from low-level ambient vibration sources. The developed MEMS power generators are featured with fixed/narrow operation frequency and power output in microwatt level, whereas, the frequency of ambient vibration is floating in some range, and power output is insufficient. In this paper, a power generator array based on thick-film piezoelectric cantilevers is investigated to improve frequency flexibility and power output. Piezoelectric cantilevers array has been designed and fabricated. The cantilevers array can be tuned to the frequency and expanded the excited frequency bandwidth in ambient low frequency vibration. Serial connection among cantilevers of the array is investigated. The prototype generator has a measured performance of 3.98 μW effective electrical power and 3.93 DC output voltage to resistance load. This device is promising to support networks of ultra-low-power, peer-to-peer, wireless nodes. 相似文献
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《III》2003,16(6):27
A research group of the Institute for Microelectronics and Microsystems (IMM) of the National Council of Research (CNR) in Catania, Italy is working to integrate fuel cells and conventional electronic devices on the same silicon chip. By using innovative micromachining processes, based on advanced and smart material engineering, they succeeded in fabricating electrocatalytic porous membranes, with a wide and tunable surface, positioned above a micro-channel system. These processes only consist of surface micromachining, fully compatible with the standard ULSI silicon technology.This is a short news story only. Visit www.three-fives.com for the latest advanced semiconductor industry news. 相似文献
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The fuel cell is basically an energy-conversion device in which chemical energy is isothermally converted into dc electricity. Several types of fuel cell systems have been developed, including the hydrogen-oxygen system used in certain space missions, but many of them employ fuels that are expensive and not readily available. Considerable research and development work is being done on hydrocarbon-air systems, which use air and ``real-world' fuels. In the direct-oxidation cells, the hydrocarbon fuel is oxidized directly at the fuel electrode. Because of reaction problems at the electrode, these cells are still in their early stages of development. In the indirect-oxidation cells, now in the systems engineering development stage, the hydrocarbon fuel is converted into an impure hydrogen, which may then be purified to a certain degree and injected into the fuel cell modules. Initial applications will probably be in the military, because of the fuel flexibility and ease of maintenance inherent in these fuel cell systems. 相似文献
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空间光调制器是自适应光学系统中用来实时校正波前畸变的关键器件,其发展水平能够反映整个自适应光学系统的水平。基于微电子机械系统(MEMS)技术的空间光调制器具有体积小、能耗低、驱动器单元密度高以及与集成电路工艺兼容性好等优点,而成为空间光调制器领域研究的热点。详细介绍了MEMS空间光调制器的研究现状和存在的主要问题,并分析了MEMS空间光调制器的未来发展趋势。 相似文献