Electronics Forum | Mon Aug 13 08:00:46 EDT 2007 | davef
Are the components that fall from the board solderable? Is the board solderable? Where is the solder for the components that fall from the board [eg, on the pads, on the component]?
Electronics Forum | Wed May 06 04:31:42 EDT 2009 | radzi
We have prob Solder voids for Connector, Micro D. We used HMP solder wire and pcb thickness is 0.093".
Electronics Forum | Tue Aug 28 14:42:38 EDT 2007 | dphilbrick
You could shoot the engineer that designed them in without having a way to manufacture them. You could also try laser soldering or selective soldering.
Electronics Forum | Wed Oct 22 09:49:22 EDT 2008 | martinwang
please check my company website: http://www.gemmy-tek.com.tw it is a fully automatic hotbar soldering machine, including fluxing, pick & place and hotbar soldering for Lumileds Luxeon LED.
Electronics Forum | Fri Aug 24 09:29:08 EDT 2007 | jgrootkoerkamp
Solder balls with wave soldering can have different causes. The two most important are the solderresist and the flux. I have similar problems, after changes the flux type 90% off all solderballs are gone. KR, Joris Groot koerkamp
Electronics Forum | Mon Sep 03 06:17:19 EDT 2007 | mun4o
hi, This is moisture problem, I think.I have similar problem.You must try to bake PCBs.I bake our PCBs in solder wave mashine , under solder pot.There T is about 80*C - after 6-8h the PCB is dry regards
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
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.
Electronics Forum | Mon Sep 10 15:49:28 EDT 2007 | mun4o
Hi, the solder on the pad is not molt.Temperature of the leads is about 220*C( I change this T from 214 to 232) but result is same - solder is granular and not diffuse.I think the T on leads is not enough high,bu I can't increase because the max T on
Electronics Forum | Thu Oct 04 09:44:24 EDT 2007 | hussman
It realy depends on your product. Tighter tollerance boards require a better machine, which costs more money. Multi-layered baords wih a alot of heat sink will require preheat - something a lot of selective solder machine do not come standard with.
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