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Proceedings IEEE Thirteenth Annual International Conference on Micro Electro Mechanical Systems (Cat. No.00CH36308)最新文献

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Electrophoresis system with integrated on-chip fluorescence detection 集成片上荧光检测的电泳系统
J. R. Webster, M. Burns, D. T. Burke, C. Mastrangelo
A monolithic capillary electrophoresis system with integrated on-chip fluorescence detection has been microfabricated on a silicon substrate. Photodiodes in the silicon substrate measure fluorescence emitted from eluting molecules. An on-chip thin film interference filter prevents excitation light from inhibiting the fluorescence detection. A transparent conducting ground plane prevents the high electric fields from interfering with the photodiode response. A truly monolithic device has been fabricated using surface micromachining methods eliminating elaborate bonding procedures. Separations of DNA restriction fragments have been performed in these devices with femtogram detection limits using SYBR Green I intercalating dye.
在硅衬底上制备了一种集成片上荧光检测的单片毛细管电泳系统。硅衬底中的光电二极管测量从洗脱分子发出的荧光。片上薄膜干涉滤光片防止激发光抑制荧光检测。透明的导电接地面可防止高电场干扰光电二极管的响应。一个真正的单片器件已经制造使用表面微加工方法,消除了复杂的粘合程序。使用SYBR Green I插层染料,在这些装置中进行了DNA限制性片段的分离,具有飞图检测限。
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引用次数: 36
Frequency response of TiNi shape memory alloy thin film micro-actuators TiNi形状记忆合金薄膜微执行器的频率响应
C.C. Ma, R. Wang, Q. Sun, Y. Zohar, M. Wong
Relatively independent of the physical dimensions of micro-actuators based on shape memory alloys (SMA), the reported frequency response typically is capped at a few tens of Hz. The slow response agrees well with that of the rotating micro-actuators fabricated in this work. On the other hand, based on heat transfer analyses, a theoretical response time of the order of a few milli-seconds should be possible for scaled microactuators, thus implying a frequency performance of at least a few hundred Hz. Therefore it is concluded that the response of SMA micro-actuators may not be limited by heat transfer, but by the slow rate of phase transformation between the austenitic and the martensitic phases. This is consistent with the slow phase growth rate of about 0.3 /spl mu/m/s observed using in-situ transmission electron microscopy.
相对独立于基于形状记忆合金(SMA)的微致动器的物理尺寸,报道的频率响应通常被限制在几十赫兹。这种慢响应与本研究制作的旋转微致动器的慢响应一致。另一方面,基于传热分析,理论上的响应时间为几毫秒,这意味着微执行器的频率性能至少为几百赫兹。因此,SMA微致动器的响应可能不受传热的限制,而是受奥氏体与马氏体相变速度缓慢的限制。这与原位透射电镜观察到的0.3 /spl mu/m/s的慢相生长速率一致。
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引用次数: 20
Mass flowmeter using a multi-sensor chip 质量流量计采用多传感器芯片
Yong Xu, C. Chiu, F. Jiang, Q. Lin, Y. Tai
We report here a novel mass flowmeter using a multisensor chip that includes a 1-D array of pressure, temperature and shear stress sensors. This shear stress sensor based flowmeter is capable of high sensitivity and wide measurement range. Our study also shows that the mass flowmeter using shear-stress sensors produces better resolution than that from pressure sensors in the laminar flow regime. Extensive tests have been carried out to evaluate the effects of overheat ratio, channel height and gas properties. We also find the V/sup 2//spl prop//spl tau//sup 1/3/ law for conventional hot film sensors does not hold for our micromachined shear stress sensor.
我们在此报告了一种新型的质量流量计,该流量计使用多传感器芯片,包括压力、温度和剪切应力传感器的一维阵列。这种基于剪切应力传感器的流量计具有高灵敏度和宽测量范围的特点。我们的研究还表明,使用剪切应力传感器的质量流量计比层流状态下使用压力传感器的质量流量计具有更好的分辨率。进行了大量的试验,以评估过热比、通道高度和气体性质的影响。我们还发现传统热膜传感器的V/sup 2//spl prop//spl tau//sup 1/3/定律不适用于我们的微机械剪切应力传感器。
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引用次数: 11
Torque measurement method using air turbine for micro devices 微器件用空气涡轮扭矩测量方法
H. Ota, L. Li, M. Takeda, H. Narumiya, T. Ohara, K. Namura
The authors have developed a general-purpose system that can measure very low torques in the order of 10/sup -7/ Nm. The new method proposed here uses wind pressure to apply a load to a turbine attached to the output shaft of the device. It can therefore be used for all rotating micro-devices. The use of wind pressure reduces the loss during measurement, and makes it possible to measure low levels of torque easily by simply attaching the turbine to the device. In the present study, the measuring principle of the new system was verified. In addition, a prototype micromotor 1.6 mm in diameter was fabricated and used to demonstrate that the new system was able to measure torques in the order of 10/sup -7/ Nm while the motor was in operation.
作者开发了一种通用系统,可以测量10/sup -7/ Nm量级的非常低的扭矩。这里提出的新方法是利用风压对连接在设备输出轴上的涡轮机施加负载。因此,它可以用于所有旋转的微型设备。使用风压减少了测量过程中的损失,并且可以通过简单地将涡轮机连接到设备上轻松地测量低水平的扭矩。在本研究中,验证了新系统的测量原理。此外,还制作了一个直径1.6 mm的微型电机原型,并用于证明新系统能够在电机运行时测量10/sup -7/ Nm量级的扭矩。
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引用次数: 1
A check-valved silicone diaphragm pump 单向阀硅胶隔膜泵
E. Meng, Xuan-Qi Wang, H. Mak, Y. Tai
Two generations of check-valved silicone rubber diaphragm pumps are presented. Significant improvements have been made from pump to pump including the design and fabrication of a double-sided check valve, a bossed silicone membrane, and silicone gaskets. Water flow rates of up to 13 ml/min and a maximum back pressure of 5.9 kPa were achieved through pneumatic operation with an external compressed air source. Using a custom designed solenoid actuator, flow rates of up to 4.5 ml/min and a maximum back pressure of 2.1 kPa have been demonstrated.
介绍了两代单向阀硅橡胶隔膜泵。从泵到泵都进行了重大改进,包括设计和制造双面止回阀,凸塞硅胶膜和硅胶垫圈。水流速度可达13毫升/分钟,最大背压为5.9千帕,通过外部压缩气源进行气动操作。使用定制设计的电磁执行器,流量可达4.5 ml/min,最大背压为2.1 kPa。
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引用次数: 50
Glass- to-glass anodic bonding for high vacuum packaging of microelectronics and its stability 用于微电子高真空封装的玻璃-玻璃阳极键合及其稳定性
Duck‐Jung Lee, B. Ju, Yun‐Hi Lee, Jin Jang, M. Oh
In this work, we have developed a new high vacuum packaging method using a glass-to-glass bonding for the application to microelectronic devices such as field emission display (FED). The glass-to-glass anodic bonding was established and optimized using introducing thin amorphous silicon (a-Si) interlayer. Also, we propose that the amount of oxygen ions is one of the important factors during the bonding process, as confirmed from the SIMS and XPS analyses for the reaction region of Si-O bond in interface. Our method was very effective to reduce the bonding temperature and make the high vacuum package of microelectronic devices over 10/sup -4/ Torr. Finally, to evaluate the vacuum sealing capability of a FED panel packaged by the method, the leak characteristics of the vacuum was examined by spinning rotor gauge (SRG) during 6 months and the electron emission properties of the panel were measured continuously for time variation during 26 days.
在这项工作中,我们开发了一种新的高真空封装方法,使用玻璃对玻璃键合,用于微电子器件,如场发射显示器(FED)。通过引入薄非晶硅(a-Si)夹层,建立并优化了玻璃间的阳极键合。此外,界面上Si-O键反应区域的SIMS和XPS分析也证实了氧离子的数量是键合过程中的重要因素之一。我们的方法对于降低键合温度,使微电子器件的高真空封装达到10/sup -4/ Torr以上是非常有效的。最后,通过旋转转子计(SRG)检测了6个月的真空泄漏特性,并连续测量了26天的电子发射特性随时间的变化,以评价该方法封装的FED板的真空密封能力。
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引用次数: 19
Electroplated rf MEMS capacitive switches 电镀rf MEMS电容开关
J.Y. Park, G. Kim, K. Chung, J. Bu
RF microswitches are newly designed and fabricated with various structural geometry of transmission line, hinge, and movable plate formed by using electroplating techniques, low temperature processes, and dry releasing techniques. In particular, Strontium Titanate Oxide (SrTiO/sub 3/) with high dielectric constant is investigated for high switching on/off ratio and on capacitance as a dielectric layer of a micromechanical capacitive switch. Achieved lowest actuation voltage of the fabricated switches is 8 volts. The fabricated switch has low insertion loss of 0.08 dB at 10 GHz, isolation of 42 dB at 5 GHz, on/off ratio of 600, and on capacitance of 50 pF, respectively. These switches also have high current carry capability due to the use of electroplated Au or Cux.
射频微动开关是采用电镀技术、低温工艺和干释放技术,将传输线、铰链、活动板等多种几何结构组合而成的新型射频微动开关。特别研究了具有高介电常数的钛酸锶氧化物(SrTiO/sub 3/)作为微机械电容开关的介电层具有较高的通断比和导通电容。所制开关的最低驱动电压为8伏。该开关在10 GHz时的插入损耗为0.08 dB,在5 GHz时的隔离度为42 dB,开/关比为600,导通电容为50 pF。由于使用电镀Au或Cux,这些开关也具有高电流承载能力。
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引用次数: 64
Silicon carbide micro-reaction-sintering using a multilayer silicon mold 碳化硅微反应烧结多层硅模
S. Sugimoto, S. Tanaka, Jingfeng Li, R. Watanabe, M. Esashi
This paper describes a novel process, "Silicon Carbide Micro-reaction-sintering", to fabricate high-aspect-ratio silicon carbide microstructures. This process consists of micromachining of silicon molds, filling of material powders ( a-silicon carbide, graphite, silicon and phenol resin) into the molds, bonding of the molds with adhesive and reaction-sintering by hot isostatic pressing (HIP). Using our process, we have successfully fabricated silicon carbide microrotors of 5 and 10 mm diameters for micromachined gas turbines. We observed the cross section of the microrotors with a scanning electron microscope (SEM). The SEM observation demonstrated that the material powder was densely reaction-sintered by HIP. We also investigated the compositions of the microrotors by X-ray diffraction (XRD) analysis. The XRD analyses proved that graphite in the material powder reacted with melted silicon derived from the mold, and consequently /spl beta/-silicon carbide was produced around the /spl alpha/-silicon carbide originally included in the material powder.
本文介绍了一种制备高纵横比碳化硅微结构的新工艺——“碳化硅微反应烧结”。该工艺包括硅模具的微加工,将材料粉末(碳化硅,石墨,硅和酚树脂)填充到模具中,用粘合剂粘合模具并通过热等静压(HIP)反应烧结。利用我们的工艺,我们已经成功地为微机械燃气轮机制造了直径为5毫米和10毫米的碳化硅微转子。用扫描电镜观察了微转子的横截面。SEM观察表明,材料粉末经HIP反应烧结致密。并用x射线衍射(XRD)分析了微转子的组成。XRD分析证明,材料粉末中的石墨与模具中产生的熔融硅发生反应,在材料粉末中原含有的/spl α /-碳化硅周围生成了/spl β /-碳化硅。
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引用次数: 16
Spiked biopotential electrodes 尖刺生物电位电极
P. Griss, P. Enoksson, H. Tolvanen-Laakso, P. Merilainen, S. Ollmar, G. Stemme
We describe the microfabrication, packaging and testing of a dry biopotential electrode (i.e. electrolytic gel is not required), The electrode consists of an array of micro-dimensioned, very sharp spikes (i.e. needles) designed for penetration of human skin which circumvents high impedance problems associated with layers of the outer skin. Deep reactive ion etching (DRIE) technology was used to fabricate the spikes. The main advantages of these electrodes include a fast and uncomplicated application procedure, low electrode-skin-electrode impedance (lower than standard electrodes), and comfortable use. The spiked electrode offers a promising alternative to standard electrodes in biomedical applications (i.e. monitoring EEG signals) and is of interest in research of new biomedical methods.
我们描述了干生物电位电极(即不需要电解凝胶)的微制造,包装和测试。该电极由一系列微尺寸,非常锋利的尖峰(即针)组成,设计用于穿透人体皮肤,绕过与外皮层相关的高阻抗问题。采用深度反应离子刻蚀(Deep reactive ion etching, DRIE)技术制备了尖峰。这些电极的主要优点包括快速和简单的应用程序,低电极-皮肤电极阻抗(低于标准电极)和舒适的使用。尖刺电极在生物医学应用(即监测脑电图信号)中为标准电极提供了一种有希望的替代方案,并且是研究新的生物医学方法的兴趣。
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引用次数: 39
3-D microsystem packaging for interconnecting electrical, optical and mechanical microdevices to the external world 用于将电气、光学和机械微设备与外部世界互连的3-D微系统封装
A. Tixier, Y. Mita, S. Oshima, Jiang Guoy, H. Fujita
This paper reports the realization of a pigtailed silicon platform with 8 WDM filters based on a new 3-D packaging technology. Four silicon pieces are released out of a silicon wafer by using ICP-RIE as a very accurate dicing tool. One edge of the piece containing the filters is patterned into pin-shapes to be vertically inserted into a mother board with electrical connections. A V-groove board for the optical fibers is mechanically aligned in the mother board. This technology enables precise assembly of active optical devices with ribbon fibers, electrical connections to 3-D micromechanical subsystems and reconfiguring the system in the module level.
本文报道了一种基于新型三维封装技术的8个WDM滤波器尾纤硅平台的实现。通过使用ICP-RIE作为非常精确的切割工具,可以从硅片中释放出四片硅片。包含滤波器的片的一个边缘被图案成引脚形状,以便垂直插入具有电连接的母板。光纤槽板在母板内机械对准。该技术可以精确装配带有带状光纤的有源光学器件,与3-D微机械子系统进行电气连接,并在模块级别重新配置系统。
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引用次数: 8
期刊
Proceedings IEEE Thirteenth Annual International Conference on Micro Electro Mechanical Systems (Cat. No.00CH36308)
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