摘要: |
针对QFN器件的结构特点,研究了其去金搪锡工艺技术,研制了一种专用搪锡工装,使用局部波峰焊机去金搪锡后,器件焊盘中金元素质量分数小于1%,可保证QFN器件焊接后无金脆隐患,极大提高产品可靠性。 |
关键词: QFN;去金;搪锡 |
基金项目: |
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Research on Process Method of Degolding and Tin-coating for QFN Components |
Qi Lin Yang Jingwei Du Shuang Li Jiabin
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Beijing Institute of Space Mechanics and Electricity, Beijing 100094
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Abstract: |
The process method of degolding and tin-coating for QFN components was studied according to its structural feature. A special fixture was designed to clamp QFN components when they were tinning using a local wave soldering machine. The mass fraction of gold in the pad of QFN components could be reduced to less than 1%. As a result, gold-embrittlement could be avoided so that the reliability of products could be improved. |
Key words: QFN;degolding;tin-coating |