摘要
部分设备在客户处使用1~2年后陆续出现异常,通过对失效机型的拆解和分析,发现均为电阻失效导致,电阻表现为值大、开路状态,且失效的电阻位置均位于导热垫边缘部位。经过对导热垫的成分分析、失效电阻的切片和成分分析以及大量模拟加速硫化试验,研究了造成导热垫边缘电阻硫化的失效机理。研究结果表示,在无硫环境下,公司所用导热垫自身并不会直接导致电阻硫化,而是在含硫环境中,导热垫具有吸附效应,使导热垫周围硫浓度更高,并在高温的催化下,加速了电阻硫化的速度,最终导致电阻硫化失效。另外,还研究了不同防硫化工艺的应用可靠性,为产品实现抗硫化提供解决方案。
Part of equipment have been abnormal after 1~2 years of use at the customer’s premises,Through the dismantling and analysis of the failed models,it was found that all were caused by resistance failures.The resistance showed a large value,an open state with the position of the resistance failure of the thermal pad are located in an edge portion.After analysis of the thermal pad component,slice resistance component failure analysis and a large number of vulcanization acceleration simulation experiment to study the mechanism causing the failure resistance of vulcanized thermal pad edges.The results indicated that the environment without sulfur,thermally conductive pad itself does not directly lead to resistance sulfide.However,the environment with sulfur-containing,the thermal pad has an adsorption effect,which makes the higher sulfur concentration around the thermal pad,and under the catalysis of high temperature,the speed of resistance vulcanization became accelerates,eventually leading to failure of the resistance vulcanization.In addition,the application reliability of different anti-vulcanization processes has been studied to provide solutions for the realization of antivulcanization products.
作者
郑东辉
陈鸿武
方超
Zheng Donghui;Chen Hongwu;Fang Chao(Zhejiang Dahua Technologyco,LTD<Zhejang Key Laboratory of Visual object Fusion>,Hangzhou,Zhejiang 310051,China)
出处
《信息记录材料》
2021年第11期18-21,共4页
Information Recording Materials
关键词
导热垫
加速硫化
电阻失效
可靠性
Thermal pad
Resistance vulcanization
Resistance failures
Reliability
