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                                                                                                                                                                                                            可控硅可靠性測試及測試標準-溫度沖擊(循環)試驗(一)

                                                                                                                                                                                                            來源:原創 瀏覽:505 發布日期:2021-01-21

                                                                                                                                                                                                            可控硅可靠性測試及測試標準--環境類試驗項目

                                                                                                                                                                                                            可靠性試驗是評估產品一定時間內可靠性水平,暴露存在的問題??煽啃允窃O計并制作在產品內的,而不是試驗出來的??煽啃栽囼炛荒芙档陀脩舻娘L險。新的可靠性評估方法是為評估生產線的設計及工藝水平的,相信合格的生產線能把可靠性做到產品中去。

                                                                                                                                                                                                            一、溫度沖擊(循環)試驗(TC /TS)測試

                                                                                                                                                                                                            目的:模擬環境溫度變化或開關機造成的溫度變化,考核溫度交替變化對產品機械/電性能的影響,暴露粘片/鍵合/塑封等封裝工藝/材料缺陷,及金屬化/鈍化等圓片工藝問題。

                                                                                                                                                                                                            條件:-65℃~150℃  (500cycle/1000cycle)

                                                                                                                                                                                                            失效機理:不同材料間熱膨脹系數差異造成界面熱匹配問題,造成金線斷裂、鍵合脫落(開路)、塑封開裂(密封性失效)、界面分層(熱阻增大) 、鍵合線開短路 、鈍化層開裂、硅鋁接觸開路、芯片背面劃痕繼續長大導致芯片開裂。

                                                                                                                                                                                                            測試標準: JESD22-A104-C


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