Electronics Forum | Wed Jan 16 09:24:11 EST 2008 | rgduval
In general, they certainly can be touched-up. I don't know of a CM yet that doesn't use a touch up step of some description. However, you'll want to be looking at the process to try and determine what is causing the pin holes and blow holes, and tr
Electronics Forum | Fri Jan 18 09:34:06 EST 2008 | realchunks
Try lifting the part with a small piece of paper. I've seen caps that did this and giving the flux a way to vent out the top side of the board got rid of the blow holes. It'll take ya 2 seconds to to try - that plus the 3 minutes to wave solder.
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 | Fri Apr 25 04:44:56 EDT 2008 | jkhiew
Hi all, I mean after post adhesive oven curing (SMD at bottom side) prior to manual insert of PTH components (top side), what is the recommended storage time prior to wave soldering in order to avoid pin/blow holes and sunken joints issues (pcb asse
Electronics Forum | Mon Aug 11 15:44:41 EDT 2008 | stimpk
Although its a fairly rough image to look at I'd think you more of a reflow or paste issue. Looking at the two resistors, they don't look so good either. Although they maintained their placement alignment the solder does'nt appear to have flowed cor
Electronics Forum | Tue Nov 25 10:00:27 EST 2008 | wavemasterlarry
I use a alcohol rag and compressed air to blow out them via holes. I think washing is over rated. A simple wipe is all you need. Plus it keeps the planet green which is what everyone seems to be squacking about these days. Thats why I wash one a
Electronics Forum | Wed Nov 26 11:19:58 EST 2008 | vladig
I don't think you can find any specs on that. As long as a solder joint can not be broken by virtually "blowing over it" any reading on the UTS, or shear strength can be very confusing. You can specify, though that the assembly (joint) should withsta
Electronics Forum | Mon Jan 19 11:58:07 EST 2009 | slthomas
Like has been said, I would expect N2 to provide for shinier joints. On the other issue, which is it...O2 or compressed air? I would expect air to do nothing, and O2 might actually make your joints oxidize faster (duller appearance)...or blow up yo
Electronics Forum | Wed Sep 09 08:25:40 EDT 2009 | davef
We understand that you have boards in production that you need to ship. In the future, you could eliminate your moisture caused blow hole issue a lot more simply than baking. Consider requiring that your board fab plate the copper thickness of throug
Electronics Forum | Tue Feb 02 14:42:55 EST 2010 | davef
smt_guy: In removing passivation coats and handling oil, board fabs do light washes with: * Sulfuric acid * Alkaline * Water ... and then blow dry. They do not see "oil" like you seem to be talking about. Their "oil" is the assumption that someone
