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SMT贴片工序-3D X-RAY检测SMT贴装线路板,BGA焊接检验

 
Issuing time:2022-09-30 13:39

SMT贴片工序-3D X-RAY检测SMT贴装线路板,BGA焊接检验

X-RAY无损透视检测仪.jpg

X-Ray (Automatic X-Ray Inspection自动X射线检查)当待测基板进入机器内部后,位于线路板上方有一X-Ray发射管,其发射的X射线穿过线路板后被置于下方的探测器(一般为摄像机)接收,由于焊点中含有可以大量吸收X射线的铅,因此与玻璃纤维、铜、硅等其它材料的X射线相比,照射在焊点上的X射线被大量吸收,而呈黑点产生良好图象,使得对焊点的分析变得相当直观。


3D X-Ray技术除了可以检验双面贴装线路板外,还可以对那些不可见焊点如BGA等进行多层图象“切片”检测,即对BGA焊接连接处的顶部、中部和低部进行逐层检验。


同时利用此方法还可测通孔(PHT)焊点,检查通孔中焊料是否充实,从而极大地提高焊点连接质量。


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