功率三级管热带海洋-寒冷环境时序影响效应分析

Study on the Time Series Effects of the Tropical Ocean and Cold Atmospheric Environment on the Power Transistor

为了研究功率三极管在热带海洋-寒冷环境时序影响效应,采用热带海洋环境和寒冷环境时序试验的方法,将试验件放置于棚下机箱内模拟其使用环境,开展自然环境试验工作。试验过程中,定期对样品分析其外观及功能性能变化情况,样品在完成5个月寒冷大气和5个月热带海洋环境试验后,出现致使ICBO和ICEO参数超差现象,通过失效分析发现,导致功率三级管失效的原因为CI离子引起管壳局部腐蚀,生成氧化产物,导致引脚间漏电,上述试验结果可为其热带海洋-寒冷环境适应性设计改进提供技术支撑。

In order to study the time series effects of the tropical ocean and cold atmospheric environment on the power transistors,a method of time series testing in tropical and cold environments was adopted.The experimental samples were placed in a shed chassis to simulate their usage environment,and natural environment testing was carried out.During the testing process,the samples were regularly analyzed for changes in appearance and functional performance.After 5 months cold atmospheric environmental testing and 5 months of tropical ocean environmental testing,the samples showed that the parameters ICBO and ICEO exceeded the tolerance.During the experimental process,the appearance and functional performance changes were analyzed,and the main environmental influencing factors were determined through failure analysis.It found that the reason for the failure of power transistors was local corrosion of the tube shell caused by CI ions,resulting in oxidation products and leakage between pins.The above experimental results can provide technical support for the improvement of its tropical ocean and cold environment adaptability design.