Ask your customer about the components they are using. There are many 
"bootleg" components on the global market and I have seen many 
solderability problems with through hole components, although not usually 
blow holes.

Regards,

Bob Metcalf
Atotech Western Regional Manager

Cell 714-334-7667
E-Mail [log in to unmask] 

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mp3 <[log in to unmask]> 
Sent by: TechNet <[log in to unmask]>
07/14/2009 03:50 AM
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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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