Hello! A couple of informational questions: (1) Are you using a tin/lead
soldering process or a leadfree soldering process?; (2) What is the
soldersphere alloy on the BGA - tin/lead or leadfree?
Dave Hillman
Rockwell Collins
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[TN] BGA soldering open issue
dear all:
I am facing a problem of bga soldering.
when the board have just soldered ,it pass all test.
But after sometime, maybe for a few weeks,
some of the bga balls opened. the function became normal if i press the
chip on the top side.
It seems that the pcb didn't warp much,it seems even no warp at all.
Does any of you know why? And how to improve?
Hechong
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