摘要
产品在加工时总会有不可控的因素影响产品质量的稳定性,为解决这一问题,本文从可靠性分布函数的角度提出了提高电阻质量的方法。本文通过对金属膜电阻进行步进应力加速寿命试验以及电阻失效前后概率分布试验,得到了失效前后的阻值概率分布函数及正常应力下的概率分布函数与可靠性指标。实验结果表明,电阻阻值失效前后分布都属于威布尔分布。同时,给出了电阻损伤7.2%~15.6%,且失效模型为持续施加电压下不可逆的积累损伤模型时的分布函数,并获得了合格电阻与冒烟损坏电阻概率分布曲线的明显区别,从而,有可能从概率分布角度定义电阻的质量特性。
There are always uncontrollable factors affecting the stability of product quality in the process of products. To solve this problem,this paper presents a method to improve the quality of resistance from the point of view of reliability distribution function. In this paper,the probability distribution function of resistance value before and after failure and the probability distribution function under normal stress and the reliability index are obtained by means of stepping stress accelerated life test and probability distribution test of resistance before and after failure. The experimental results show that the distribution of resistance value before and after failure belongs to Weibull distribution. At the same time,the distribution function is given when the resistance damage is 7.2%~15.6% and the failure model is an irreversible accumulated damage model under continuous voltage application,the obvious difference between qualified resistance and smoke damage resistance probability distribution curve is obtained,it is thus possible to define the mass properties of resistors in terms of probability distributions.
作者
王倩男
何文辉
WANG Qiannan;HE Wenhui(Mechanical and Electrical Engineering College,China University of Metrology,Hangzhou Zhejiang 310018,China)
出处
《电子器件》
CAS
北大核心
2021年第1期14-18,共5页
Chinese Journal of Electron Devices
基金
浙江省公益技术研究计划项目(LGF20F020011)。
关键词
金属膜电阻
概率分布函数
可靠性
metal film resistance
probability distribution function
reliability
