Electronics Forum | Thu Dec 05 11:36:30 EST 2002 | William Guatemala
Have you check the flux gravity lately? If not, Check the flux gravity every 6 hours to make sure proper parameters are meet. Here is a list of things that may cause your solder ball problems; Excecive heat, defective fixtures, preheating temperature
Electronics Forum | Mon Mar 24 08:57:20 EST 2003 | russ
I don't know if I would call it a "blow hole". what I believe happens (I don't have a camera to watch spheres during the reflow process) is that when the flux starts heating up, expansion, bubbling, or something physically displaces the balls. We fo
Electronics Forum | Mon Aug 16 04:55:30 EDT 2004 | roel
Concerning the solder-balls, there are a few causes for this. Try to slow down your solder-speed (P.e 80cm/min). Can you measure temperature after the pre-heat zone? Are there also blow-holes in the joints? Personally I think there is some water in t
Electronics Forum | Thu Jan 25 04:55:08 EST 2007 | greg york
Strange as we have had huge problems with Silver in Many different Assembly houses. Mainly with Nitric Acid based Silvers causing blow holes, non wetting and even the Nitric etching away the tracks on fine boards. It has been one of the main problem
Electronics Forum | Thu Sep 27 10:53:59 EDT 2007 | gregoryyork
Joris, > > Yep, very common to have those small > blow holes in lead-free alloys. We used to get > them very consistently on white-tin finished > boards, and less frequently with gold finished > boards, for what ever that is worth. > > IPC-6
Electronics Forum | Thu Mar 12 13:26:16 EDT 2009 | rgduval
We're using Sn100C at wave. Well, to be fair, in a static solder pot; as we don't have a lead-free wave machine in operation at the moment. We've had generally good experiences with the SN100. Good soldering; some blow holes, but, since we're usin
Electronics Forum | Thu Aug 06 12:49:41 EDT 1998 | justin medernach
| I am looking for advice or information from anyone about the possible reliability problems associated with epoxy on solder pads of discrete devices. Will the epoxy expand and lift over time, Will there be adverse reaction between the solder and the
Electronics Forum | Wed Oct 02 20:59:23 EDT 2002 | davef
We�ve been stewing on this and it just dawned on us the part that�s missing. Blow-holing is caused by BOTH of the following: * Moisture absorption by the resin that holds the board together. [Steve is addressing this with his various baking schemes
Electronics Forum | Fri Feb 01 11:02:51 EST 2008 | flipit
You could also try Wenesco and Air Vac. I have experience on the Air Vac PCBRM10 and PCBRM12. They work great. You have to make sure your nozzle or flow well is designed correctly. For 50 mil pitch and greater, they work well. If you have to rem
Electronics Forum | Thu Dec 28 16:20:12 EST 2017 | rgduval
Pictures of your issues would help us to help you. Pin holes/blow holes are generally caused by either moisture or flux volatiles/organics. Since you've virtually eliminated moisture, it might be time to look at your paste/flux. You can call eithe
