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高密度集成技术与电子装备小型化 总被引:1,自引:0,他引:1
小型化和一体化是未来电子装备的主流发展方向。电子装备的小型化和一体化离不开高密度集成技术,三维芯片堆叠、芯片倒装焊接、高密度多层布线基板和SIP封装等高密度集成技术在国内的研究正在兴起。未来的电子装备不仅仅是由一个个元器件组装而成,而是电路和封装密不可分的一个3D互连系统。 相似文献
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电子设备的整体结构形式不仅影响产品的可靠性与美观性,而且还影响冷却系统的合理性与有效性。主要介绍采用强迫通风制冷方法对电子设备进行冷却时,结构因素对风冷效果的影响。 相似文献
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With the advent of the manufacture of miniature radio transmitters, the use of electronic devices for eavesdropping has become more and more prevalent. There are presently no federal laws directly prohibiting the purchase or use of electronic surveillance equipment. 相似文献
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G. N. Shilo E. K. Areshkin N. P. Gaponenko 《Radioelectronics and Communications Systems》2017,60(1):42-45
It is considered an influence of printed circuit boards placement on temperature distribution in electronic equipment units with natural air cooling. Modeling of the temperature distribution in the unit and research of mass-dimension characteristics were carried out by means of CADs and engineering analysis. There are developed simplified geometric and thermal models of the unit. Here we analyze specificities of heat exchange in the units of radio electronic equipment with natural air cooling. It is developed an algorithm for optimization of printed circuit boards placement in radio electronic equipment with natural air cooling taking into account non-uniform power distribution between printed circuit boards. Proposed algorithm can be used as one of the stage of optimization of size, carrying or mass-dimension factors of the unit in case where unit powers are distributed non-uniformly. 相似文献
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Heat Pipe Integrated in Direct Bonded Copper (DBC) Technology for Cooling of Power Electronics Packaging 总被引:2,自引:0,他引:2
Ivanova M. Avenas Y. Schaeffer C. Dezord J.-B. Schulz-Harder J. 《Power Electronics, IEEE Transactions on》2006,21(6):1541-1547
Thermal dissipation in power electronics systems is becoming an extremely important issue with the continuous growth of power density in their components. The primary cause of failure in this equipment is excessive temperatures in the critical components, such as semiconductors and transformers. This problem is particularly important in power electronic systems for space applications. These systems are usually housed in completely sealed enclosures for safety reasons. The effective management of heat removal from a sealed enclosure poses a major thermal-design challenge since the cooling of these systems primarily rely on natural convection. In this context, the presented paper treats the heat pipes as effective heat transfer devices that can be used to raise the thermal conductive path in order to spread a concentrated heat source over a larger surface area. As a result, the high heat flux at the heat source can be reduced to a smaller and manageable level that can be dissipated through conventional cooling methods. The objective of our work is to describe the feasibility of a cooling system with miniature heat pipes embedded in a direct bonded copper (DBC) structure. The advantage of this type of heat pipe is the possibility for implementation of the component layout on the heat pipe itself, which eliminates the existence of a thermal interface between the device and the cooling system 相似文献
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现代通讯设备向着大容量、高集成度的方向不断发展,微型电子电路在设备中被广泛使用,而微型电子电路对电压、电流、温湿度等条件的要求是非常苛刻的,电压的波动、环境的干扰都有可能造成通讯设备异常甚至产生故障。大自然是严酷的,尤其是在雷电等自然现象面前,"柔弱"的通讯设备很容易受到伤害,如何减少和避免这种伤害,涉及到电源、接地、防雷等众多学科,文章从雷电入侵电子通信设备入手,主要阐述高山台站防雷的一些基本原理,并从实践的角度探讨雷击防护的有效方法。 相似文献
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电子设备散热技术研究 总被引:2,自引:0,他引:2
随着微电子技术的发展,使得电子器件的热流密度不断增加,这样势必对电子器件有更高的散热要求,因此有效地解决散热问题已成为电子设备必须解决的关键技术.针对现代电子设备所面临的散热问题,就自然对流散、强制风冷散热、液体冷却、热管、微槽道冷却、集成热路、热电致冷等常用的电子设备散热技术及某些前沿的研究现状、发展趋势及存在问题分别予以阐述,希望对同行能有所帮助. 相似文献
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开关电源不断的小型化、轻量化和高效率,在电子设备中使用量越来越大,普及率越来越高。相应地要求铝电解电容器小型大容量化,耐纹波电流,高频低阻抗化,高温度长寿命化和更适应高密度组装。 相似文献
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高密度密封电子设备热设计与结构优化 总被引:1,自引:0,他引:1
通过对一种高密度密封电子设备的设计实践,阐述了密闭设备结构热设计中的设计思想及一些具体散热结构.同时应用Flotherm热分析软件进行结构热设计验证与优化,从而对多种分析结果比较,并找出了适合该设备的散热模型,以供实际应用借鉴. 相似文献
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The small physical size of electronic equipment, space limitation for installing air-cooling systems and high heat flux produced from a single chip have attracted a great deal of interest in more efficient heat dissipation equipment such as high-performance liquid cooling systems and mini-rectangular fin heat sinks. In this study, the influence of nanofluids on the performance of heat sink for CPU cooling is investigated experimentally and numerically. The former is carried out for water and nanofluid CuO-water at two solid concentrations of 0.86 and 2.25 vol.%. While in the latter, numerical simulations are validated for the laminar flow model with the application of the commercial package ANSYS Fluent 13. For the investigated range of mass flow rate and heat load (115 and 130 W), up to 7.7% of thermal conductance improvement is observed in case of nanofluids in comparison to water. The results of this study pave the way for more credible designs of cooling systems of electronic devices to promote a high-performance and longer life cycle. 相似文献
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