結論 - 中華大學

1. Sn-Ag-Cu-In-Zn系銲錫合金之顯微結構觀察，以配方來看添加1.0 wt.%Zn，

使得Ag3Sn 均勻分散；當Zn 添加至3.0 wt.%時，則Ag3Sn 呈現非均勻針狀分佈。Sn-3Ag-0.5Cu-8In-1Zn銲錫合金顯微組織中發現其Ag3Sn化合物因為 Zn的添加而呈現點狀均勻的分佈於試片上，亦有Ag-Zn金屬間化合物行成較 Sn-3Ag-0.5Cu銲錫合金多且細緻。

2. Sn-Ag-Cu-In-Zn系銲錫合金之熱性質分析顯示，Sn-3Ag-0.5Cu-8In-1Zn銲錫合金的固/液相線溫度為188℃與196℃，最為接近Sn-37Pb鉛錫合金的熔點 (183℃)。

3. Sn-Ag-Cu-In-Zn 合金與Au /Ni-P /Cu基板之接觸角，添加In元素可以降低Zn 元素所造成潤濕性不佳的狀況，提高Sn-Ag-Cu-In-Zn合金對Au /Ni-P /Cu基板之潤濕性質。但當Zn比例為3 wt%時，In添加的效果有限，故以本實驗而言 Zn的添加比例以1 wt%為佳。在使用助銲劑與迴焊條件為一般業界所使用之 Sn-3Ag-0.5Cu銲錫合金用的相同條件下，Sn-3Ag-0.5Cu-8In-1Zn銲錫合金的接觸角為16.97°與Cu-3Ag-0.5Cu銲錫合金相近，這部分對使用者而言是可以在不變更製程下更換其他銲錫合金。

4. Sn-Ag-Cu-In-Zn合金銲錫與Cu/Ni-P/Au基板之材料反應，以本實驗而言，

Sn-3Ag-0.5Cu-8In-1Zn銲錫合金與Cu/Ni-P/Au基板之材料反應皆優於本實驗其他比例成分銲錫合金。

就本實驗整體而言，Sn-3Ag-0.5Cu-8In-1Zn銲錫合金特性皆優於 Sn-3Ag-0.5Cu銲錫合金，有進一步探討研究的價值。

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