共查询到18条相似文献,搜索用时 125 毫秒
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MEMS(微电子机械系统)湿度传感器是利用标准的CMOS技术加上MEMS的后处理技术制造,以其体积小、响应快等优点受到越来越多的重视,介绍了本实验室研制的MEMS压阻式湿度传感器的测试原理、硬件电路的设计和传输函数模型的建立,以及软件设计和封装设计,最后给出了样机的测试结果。 相似文献
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针对石墨烯MEMS压力传感器气密性封装的需求,设计出一种用于石墨烯MEMS压力传感器芯片级Au/Sn共晶键合工艺方法。石墨烯压力传感器芯片键合密封环金属采用50/400 nm的Cr/Au,基板键合密封环金属采用50/400/500/3 nm的Cr/Au/Sn/Au。随后使用倒装焊机在280℃以及8 kN的压力环境下保持6 min,完成芯片与基板的Au/Sn互溶扩散键合工艺,从而实现石墨烯压力传感器芯片的气密性封装。对键合指标进行测试,平均剪切力达20.88 MPa,平均漏率为4.91×10-4 Pa·cm3/s,满足GJB548B-2005的要求。通过比较键合前后的芯片电学特性,石墨烯敏感结电阻平均值变化了1.1%,具有较高的稳定性。此外键合界面能谱测试结果符合Au/Sn键合金属合金元素组分,为石墨烯MEMS压力传感器低成本、高效率气密性封装奠定了基础。 相似文献
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为了降低微电子机械系统(MEMS)加速度器件的热机械噪声,提高信噪比,使之能应用于石油勘探和地震监测中,对一种三明治式电容加速度传感器的器件级真空封装工艺进行了研究。这种器件级真空封装方法采用可编程高真空封装设备和MEMS工业中常用的材料、工艺,可适用于不同尺寸或布局的MEMS芯片。利用该封装方法,对一种采用自停止腐蚀工艺在中间质量块键合层上制作出2个对称"V"型槽的三明治式电容加速度计进行了真空封装,并对封装后的器件进行性能测试。结果表明,该加速度计在有吸气剂的情况下,品质因子(Q)可达到76,理论热机械噪声为0.026μg/槡Hz,腔体内部压强小于13 Pa,He气细漏检测漏率低于3×10-10Pa.m3/s,氟油粗漏无气泡,满足地震监测要求。 相似文献
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XIEXuqiang YUTieyan 《半导体光子学与技术》1996,2(4):302-306
The mositure content inside the hermetic package of semiconductor de-vice has been quantitatively measured by using in-site sensor technique and computer-aided-test system.The principle and apparatus for measurement are introduced.The results show good repeatability and consistency.This technology can be used as a stan-dard test for controlling the moisture content within semiconductor device package. 相似文献
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The development of a thick-film hermetic BGA package for a radio-frequency (RF) microelectromechanical systems (MEMS) 2-bit phase shifter is presented. The measured packaged MEMS phase shifter average in-band insertion loss was 1.14 dB with an average return loss of 15.9 dB. The package transition insertion loss was less than 0.1 dB per transition with excellent agreement between simulated and measured results. It was also demonstrated that the RF MEMS phase shift performance could be improved to obtain a phase error of less than 3.3 degrees. The first reported measurements of the average rise and fall times associated with a MEMS circuit (in this case a 2-bit phase shifter) were 26 and 70 /spl mu/s, respectively. The advent of packaged RF MEMS phase shifters will reduce the cost (both design and building) of future phase arrays. 相似文献
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Qian Wang Sung-Hoon Choa Woonbae Kim Junsik Hwang Sukjin Ham Changyoul Moon 《Journal of Electronic Materials》2006,35(3):425-432
Development of packaging is one of the critical issues toward realizing commercialization of radio-frequency-microelectromechanical
system (RF-MEMS) devices. The RF-MEMS package should be designed to have small size, hermetic protection, good RF performance,
and high reliability. In addition, packaging should be conducted at sufficiently low temperature. In this paper, a low-temperature
hermetic wafer level packaging scheme for the RF-MEMS devices is presented. For hermetic sealing, Au-Sn eutectic bonding technology
at temperatures below 300°C is used. Au-Sn multilayer metallization with a square loop of 70 μm in width is performed. The
electrical feed-through is achieved by the vertical through-hole via filling with electroplated Cu. The size of the MEMS package
is 1 mm × 1 mm × 700 μm. The shear strength and hermeticity of the package satisfies the requirements of MIL-STD-883F. Any
organic gases or contamination are not observed inside the package. The total insertion loss for the packaging is 0.075 dB
at 2 GHz. Furthermore, the robustness of the package is demonstrated by observing no performance degradation and physical
damage of the package after several reliability tests. 相似文献
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An advanced regression scheme is proposed to analyze fine leak batch testing data of multiple MEMS packages. The scheme employs the forward-stepwise regression method to infer the information of leaky packages from a batch test data. The analysis predicts the number of leaky packages and the true leak rate of each leaky package in a progressive manner. The scheme is implemented successfully using an actual batch test data obtained from wafer-level hermetic MEMS packages. An error analysis is followed to define the applicable domain of the scheme. Advanced formulations are also suggested to extend the applicable domain. 相似文献
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Chen M.J. Anh-Vu Pham Evers N. Kapusta C. Iannotti J. Kornrumpf W. Maciel J. 《Microwave Theory and Techniques》2008,56(4):952-958
We present the design and development of an organic package that is compatible with fully released RF microelectromechanical systems (MEMS). The multilayer organic package consists of a liquid-crystal polymer film to provide near hermetic cavities for MEMS. The stack is further built up using organic thin-film polyimide. To demonstrate the organic package, we have designed and implemented a 2-bit true-time delay X-band phase shifter using commercially available microelectromechanical switches. The packaged phase shifter has a measured insertion loss of 2.45 plusmn 0.12 dB/bit at 10 GHz. The worst case phase variation of the phase shifter at 10 GHz is measured to less than 5deg. We have also conducted temperature cycling (-65degC to 150degC) and 85/85 to qualify the packaging structures. 相似文献