Electronics Forum | Mon Jul 21 21:59:08 EDT 2003 | davef
Theory #6 [maybe 3a?]: If you change your paste to a 'non-voiding' paste, your problem will go away. It's the flux in your paste that's killing you. The flux gets trapped in the solder and then releases ejacta that form the volcanic openings in you
Electronics Forum | Tue Jul 22 02:33:36 EDT 2003 | iman
Dave F, thats' the path of thought we are now bumbling along, but no way is the paste vendor is going to admit straight out to any such affirmation. Any literature online on this possible root cause? as it helps to gain substain-able theory in ha
Electronics Forum | Wed Jul 21 01:57:48 EDT 2004 | Thomas
Hi, It is in Celcius. Baking at 2hrs at 110�C , did not help. The problem is consistent and happens at random locations. Fresh flux and new foaming tank has not done the trick also. But I am looking into the contamination issue under scope.
Electronics Forum | Wed Jul 21 13:18:19 EDT 2004 | patrickbruneel
Thomas, The first thing I would suggest you to do is identify the type of problem your dealing with �pinhole� or �blowhole� before you can take the appropriate action to correct the problem. A pinhole is a void or cavity caused by non-wettable part
Electronics Forum | Sun Jul 25 22:03:31 EDT 2004 | Thomas
Thanks to all you guys for the advice. I will take your suggestions and work it out. THis is a great site to visit when you are lost in finding a direction. Ha !! Take care guys !!
Electronics Forum | Wed Apr 04 17:40:39 EDT 2007 | davef
Rob: How do you rework blow-holes and pin-holes? PTH plating thickness SB 1 thou or greater. Epoxy is hydroscopic. So, you should control the environment and/or bake the moisture from the boards before soldering. Search the fine SMTnet Archives f
Electronics Forum | Wed Jan 16 08:58:43 EST 2008 | Adam
Hi If I have an assembly where the solder joints are suffering from blowholes and Pinholes. Could these solderjoints be reworked/touched up to form a reliable/acceptable solderjoints ?
Electronics Forum | Wed Jan 16 12:30:38 EST 2008 | davef
As Rob says, blowholes and pinholes are process indicators. Reworking them most likely makes the solder connection less reliable, because it is very difficult to heat the solder connection properly. Shrewd rework-types "paint" solder over these open
Electronics Forum | Fri Jun 25 12:07:00 EDT 1999 | John Thorup
| | hello, | | | | has anyone tried dispensing solder paste in thru holes instead of waving or hand soldering. if so how did it work out for you. | | thanks for the input | | | | wayne | | | | | | | We have tried this mainly on thru hole connect
Electronics Forum | Mon Aug 09 10:27:14 EDT 1999 | Tim Murphy
Just curious what effect pinholes and solder voids can have on solder joints that have high current passing thru them. Also could moisture from steam sterilization (autoclaving) get inside a said solder joint and then outgas during high current, and/
