Electronics Forum: blowhole (Page 1 of 8)

Oil for Bob Willis blowhole test

Electronics Forum | Thu Apr 29 15:34:40 EDT 2010 | bradlanger

Does anybody know where you can get Canada Bolson Oil or Suitable alternative that is optically clear to test the plating in a PTH for outgassing?

Oil for Bob Willis blowhole test

Electronics Forum | Thu Apr 29 20:06:20 EDT 2010 | davef

We could never find that stuff either. Must be from some Euroland source. As an alternative, try: Cedarwood immersion oil [Fisher Scientific, S79956]

Blowholes during wave soldering

Electronics Forum | Mon Sep 10 11:13:47 EDT 2007 | russ

Aren't the solder balls a result of the blowholes? you know the solder that came from the blowholes is now the solderballs on the resist! hahaha :-) Russ

Blowholes during wave soldering

Electronics Forum | Wed Aug 29 02:21:42 EDT 2007 | jgrootkoerkamp

It is a lead free process with sac305. We use goldfinish FR4 boards. Preheat is between 110 and 115 degrees. I am sure it is a moisture problem because longer stored boards have more blowholes. What is the maxium period to store the boards without

Blowholes during wave soldering

Electronics Forum | Tue Aug 28 07:36:25 EDT 2007 | davef

If the copper on your PTH is not one thou, you will get blowholes. With the cost of copper going through the ceiling, you will get less than one thou of copper plating from substandard suppliers. Consider baking your boards prior to wave soldering

Blowholes during wave soldering

Electronics Forum | Sun Sep 09 16:03:50 EDT 2007 | davef

Wave Optimizer-person Help us understand how your "excellent wave solder guide called 'Take No Prisoners' that includes instructions for attacking and eliminating solder balls and preventing their recurrence" will help Joris resolve his / her issues

Blowholes during wave soldering

Electronics Forum | Thu Sep 27 09:28:42 EDT 2007 | jgrootkoerkamp

Thanks for all the answers. Is it also possible with lead free soldering to produce little holes in the solder that are not blowholes? We see holes where you can see the end of the hole (not very deep). The holes are always on the same places.

Right angle PTH lead profile = blowholes

Electronics Forum | Sat Jan 19 10:58:23 EST 2008 | slthomas

That's a good idea. We did pull the bridge piece off of one just to see what happens with the receptacles only, so no flux blockage. They flowed great with no blowholes, but also filled with solder. :/

Percentage of Blowholes and Pinholes can eliminate.

Electronics Forum | Thu Oct 17 05:16:44 EDT 2013 | vincentdesilva2003

Anyone can help me how many percentage of blowholes and pinholes if i do the followings: 1. Increase copper plating thickness more than 25 microns. 2. Pre Baking of PCB to remove gassing by drying out the PCB's

Blowholes during wave soldering

Electronics Forum | Tue Aug 28 06:17:11 EDT 2007 | jgrootkoerkamp

I have problems with blowholes during the wave soldering process. I already find out that the stock time between reflow and wave is the most important. The longer the boards are in stock the more blowholes we have. We don't have a climat controlled

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