CAJ | 학술논문

针对加速实验中因失效机理发生改变而导致的无效实验问题,对失效机理一致性和分别在不同应力下器件的初期退化参数分布的关系进行了研究.研究证明了判断加速实验失效机理一致的条件:1)不同应力下失效分布的形状参数服从一致,即mi=m, i=1,2,3,···,2)尺度参数ηi服从ηi=AFi ·η.从而提供一种在实验初期即可根据参数退化分布快速判别不同应力下失效机理是否一致的方法,避免了因失效机理发生改变而造成的无效加速实验.最后对加速实验初期理论退化数据和多芯片组件厚膜电阻初期退化数据进行了威布尔分布参数估计,并对其在不同应力下的失效机理一致性进行了判别.
침대가속실험중인실효궤리발생개변이도치적무효실험문제,대실효궤리일치성화분별재불동응력하기건적초기퇴화삼수분포적관계진행료연구.연구증명료판단가속실험실효궤리일치적조건:1)불동응력하실효분포적형상삼수복종일치,즉mi=m, i=1,2,3,···,2)척도삼수ηi복종ηi=AFi ·η.종이제공일충재실험초기즉가근거삼수퇴화분포쾌속판별불동응력하실효궤리시부일치적방법,피면료인실효궤리발생개변이조성적무효가속실험.최후대가속실험초기이론퇴화수거화다심편조건후막전조초기퇴화수거진행료위포이분포삼수고계,병대기재불동응력하적실효궤리일치성진행료판별.
@@@@For avoiding the invalid acceleration experiments caused by the changes of the failure mechanism, the relationship of the failure mechanism consistency and the parameters of degradation data distribution in the early stage under different accelerated stress levels has been derived. Conditions for judging the failure mechanism consistency are also given as follows: firstly, the shape parameters of failure distribution has a uniform distribution mi=m, i=1,2,3,···; secondly, the dimension parameterηi follows the equationηi=AFi ·η. A method to rapidly discriminate the consistency of failure mechanism under different experimental stresses in the early stage was obtained, and the invalid acceleration experiments caused by the changes of the failure mechanism could be avoided. Finally, theoretical degenerate data in the early stage of the accelerated test and the initial degenerate data of the MCM thick-film resistor were used for estimating, Weibull distribution parameter, and the consistency of failure mechanism degradation was also judged.