我觉得越细的引脚就更应该不让步 要不然不是随着科技含量越高而可靠性越低？

在2010-06-10 17:34:33，"Nancy Deng" <[log in to unmask]> 写道：


Hello, all:

在IPC-A-610 7.1.2.3  引脚成形时，元件引脚的损伤超过引脚直径的10%，为缺陷1，2，3级。

对于细引脚元件，特别是直径小于0.8mm 的元件，在成形的过程，不可避免的损伤的直径一般为10-20%，请参看下图，不知各位在损伤的标准是否做过让步？让步的标准是什么？

 

谢谢不吝赐教！

 

Best regards and thanks

Nancy Deng

 

_


______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________

______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________