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Humidity Control in Electronic Devices: Water Sorption Properties of Desiccants and Related Humidity Build-Up in Enclosures
IEEE Transactions on Components, Packaging and Manufacturing Technology ( IF 2.2 ) Pub Date : 2020-12-17 , DOI: 10.1109/tcpmt.2020.3045495
Helene Conseil-Gudla 1 , Morten Stendahl Jellesen 1 , Rajan Ambat 1
Affiliation  

A common concern with electronics packaging is the reduction of moisture ingress into the devices. One option to consider is the use of water absorption desiccant. Its criteria for selection should be its water capacity property, while its regeneration temperature has to be taken into account. Electronic devices are exposed to all kinds of harsh cyclic environments, and assuring a low level of humidity inside the devices implies the replacement of the desiccant once its saturation content is reached. This may not be applicable, or the frequency of replacement may represent a high cost. Using the dissipated heat from the electronic devices during the “ON” time may be a low-cost process for the regeneration of the desiccant, therefore increasing its lifetime. This article presents the experimental investigation of the performance of different desiccants on water absorption and regeneration. Analysis and test results show that the desiccant system continuously maintains a lower humidity inside the electronic enclosures over the tested time of cyclic exposure if they can be regenerated using device self-heating.

中文翻译:

电子设备中的湿度控制:干燥剂的吸水特性和外壳中的相关湿度累积

电子封装的普遍关注是减少水分进入设备。要考虑的一种选择是使用吸水干燥剂。它的选择标准应是其水容量特性,同时必须考虑其再生温度。电子设备暴露于各种恶劣的循环环境中,确保设备内部的湿度较低意味着一旦达到干燥剂的饱和含量,就必须更换干燥剂。这可能不适用,或者更换的频率可能会导致高昂的成本。在“ ON”时间内使用电子设备散发的热量可能是用于干燥剂再生的低成本过程,因此会延长其使用寿命。本文介绍了不同干燥剂对水的吸收和再生性能的实验研究。分析和测试结果表明,如果可以使用设备自热对其进行再生,则干燥剂系统会在经过测试的循环暴露时间内持续保持电子外壳内部的湿度较低。
更新日期:2021-02-19
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