icy ,您好！
IST 测试是按照IPC-TM-650 2.6.26进行。按照标准要求做成菊花链测试板，通过冷热循环监测其互连电阻，测试孔壁铜与基材的结合力，孔壁铜的延展性及内层间结合力等。
======= 2007-09-10 16:51:33 您在来信中写道：=======
>请问下面测试要求具体是怎么测的，谢谢
>
>IST test (DC Current Induced thermal Cycling Test) according to the specification IPC-TM-650, number 2.5.26 .
>
>
>
>Best Regards
>
>Icy Liu (刘旭华)
>
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2007-09-11
