This paper presents the results from multiple studies at Honeywell, of piece-part failure rates experienced in field use. These studies consider 7 line-replaceable-units (LRU), containing either hermetically sealed microcircuits (HSM) or plastic encapsulated microcircuits (PEM) or both. This paper compares the resulting field failure rates (/spl lambda/) of HSM and PEM: digital devices: /spl lambda//sub PEM//spl ap/0.5/spl lambda//sub HSM/; linear devices: /spl lambda//sub PEM//spl ap/3/spl lambda//sub HSM/; only a small fraction of the linear devices degraded in performance at 125/spl deg/C, though their performance at room temperature was within specification. The latter two points suggest that linear devices might require more attention relative to characterization over temperature and application considerations than do digital devices.
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机译:本文介绍了在霍尼韦尔进行的多项研究得出的结果,这些结果是在现场使用中遇到的零件失效率。这些研究考虑了7个线路可更换单元(LRU),其中包含气密密封的微电路(HSM)或塑料封装的微电路(PEM)或两者。本文比较了HSM和PEM产生的现场故障率(/ spl lambda /):数字设备:/ spl lambda // sub PEM // spl ap / 0.5 / spl lambda // sub HSM /;线性设备:/ spl lambda // sub PEM // spl ap / 3 / spl lambda // sub HSM /;尽管只有125%/ spl deg / C的线性器件在室温下的性能在规格范围内,但其性能却下降了。后两点表明,相对于温度和应用方面的表征,线性器件可能需要比数字器件更多的关注。
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