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Analysis of Laser Welding Cracks on Kovar Alloy Box
Pages: 45-49
Year: Issue:  1
Journal: Electronics Process Technology

Keyword:  Kovar alloyLaser weldingCrystal cracksHot crackElectronic packaging;
Abstract: 可伐(Kovar)合金作为一种功能材料,在较宽的温度范围内(-80℃~450℃)内膨胀系数与硬玻璃的膨胀系数相近,可以保证材料的匹配封接。主要分析了可伐合金外壳采用激光封焊时焊缝处产生裂纹的原因,并就改善焊接裂纹提出了改进措施,主要措施包括焊接工艺参数的优化、焊接结构的优化设计、焊接前的清洗及热处理。
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