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材料工程  2008 

CdZnTe表面处理对其引线超声焊接质量的影响

, PP. 9-12

Keywords: CdZnTe晶片,超声焊接,表面处理,电极厚度

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Abstract:

采用扫描电镜及EDS测试研究了高电阻CdZnTe金电极与外引线的超声焊接工艺,探讨了CdZnTe表面处理工艺、接触电极厚度及焊接参数对引线超声焊接质量的影响规律.研究结果表明,经机械抛光表面处理的CdZnTe晶片,其金电极与外引线间容易实现超声焊接;CdZnTe电极厚度与引线焊合率之间呈抛物线关系,获得最佳焊接质量的电极厚度为180nm左右.楔入压力和焊接功率是影响CZT金电极与引线焊接质量的重要因素,当焊接功率为2W、焊接压力为60×10-3kg、焊接时间20ms和烧球强度1.5W时,易获得良好的CdZnTe金电极与引线焊接接头.

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