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第四单元. 可靠性试验. 可靠性试验的特点. 具有破坏性 — 以发现产品在设计、材料和工艺方面的各种缺陷为目的 必须施加应力 — 环境应力或工作应力 可以给出可靠性指标. 可靠性试验的分类. 可靠性筛选试验 可靠性测定实验 可靠性增长试验 可靠性鉴定和验收试验 加速寿命试验. 环境应力筛选试验. ESS (Environment stress screen) 是通过向电子产品施加合理的环境应力和电应力,将其内部的潜在缺陷加速变成故障,并通过检验发现和排除的过程,是一种工艺手段。其目的是筛选剔除早期失效的产品,提高产品的可靠性水平。. 100% 筛选.

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第四单元

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ESS (Environment stress screen)

100%


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GJB1032

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MLEMaximum Likelihood Estimation)


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(3) MLE


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