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| Date: | Tue, 14 Jul 2009 15:55:30 -0400 |
| Content-Type: | text/plain |
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Hi Pradeep,
Did they bake the moisture out of the PCBs prior to wave soldering?
Werner
-----Original Message-----
From: mp3 <[log in to unmask]>
To: [log in to unmask]
Sent: Tue, Jul 14, 2009 6:50 am
Subject: [TN] Solderability
Hi,
We are a PCB manufacturer and we had supplied some 2.4mm thick PCBs to one of
our customers who has complained regarding solderability issue. They say there
are having issues with respect to blowholes / pinholes after wavesoldering. We
had checked for solderability on the coupon and had ensured that everything is
acceptable prior to the despatch. We repeated the same after receipt of the
feedback and found the results to be OK. To simulate it, we sent a couple of
bare circuits to a 3rd party assembler and got it wave soldered. The hole
diameters are 2.55mm and 1.0mm . The photographs after wavesoldering trials are
attached. We find it to be quite OK. We feel that since there are no components,
and since the diameter is on the higher side, there will be a slight depression
at the centre. But the customer insists that the trial boards too have a
problem. Can you give a feedback on this after checking the attached
photographs. We were asking our customer to check on the parameters like fluxing
etc. And he says all are well in control. Any inputs to understand this issue
better.
rgds
pradeep
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Micropack Ltd, Bangalore, India
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Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
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