Electronics Forum | Mon Mar 17 04:31:52 EDT 2008 | d0min0
Hello, tried searching the SMTnet archives, but not yet a clear answer - maybe there is not a one yet ? ;) last discussion I found is few years old so maybe there is a fresh view on that? Q: we want to prove that our proces is "clean" we use SAC30
Electronics Forum | Mon Apr 18 12:39:57 EDT 2022 | winston_one
Thanks for all comments. Process was adjusted normally, problem was in PCBs. Microsection of bare boards confirm that the copper thickness in troughholes was unsuffient, sometimes below 10 microns, on soldered boards where there were a problems durin
Electronics Forum | Mon Jul 17 14:54:57 EDT 2006 | finalassy
Preheat is a option that we use on almost all boards. We have the pillarhouse jade models.
Electronics Forum | Wed Mar 19 04:15:03 EDT 2008 | d0min0
Thank You Michael, as I read on previous contamination related topics I planned to ask your opinion on that directly :-) but You were faster than my action :) I will share Your opinion internally and hopefully we will take further actions best reg
Electronics Forum | Mon Dec 10 13:26:40 EST 2012 | dyoungquist
We are using our selective solder machine to solder a backplane with sixteen (16) 4x48 pin 0.080" connectors. Our first pass yield is about 85% meaning that 85% of the connectors come out with no bridges. Not quite as fine pitch as your connector a
Electronics Forum | Tue Sep 25 19:26:39 EDT 2012 | caurbach
So, I just learned that alpaca isn't just a cousin of the llama, it's also a Cu/Ni alloy (imitation silver). Creeped me out at first... When you say "poor filling and no solder", are you referring to wetting problems? Do you have any photos you co
Electronics Forum | Wed Dec 19 10:33:58 EST 2012 | emeto
I had a connector like this and here is my recommendation: 1. Flux type(I like better alchohol based flux than water based) 2. Try higher soldering speed(when I say higher I mean several times higher) Goodf Luuck!
Electronics Forum | Thu Apr 14 15:27:05 EDT 2022 | ppcbs
If it was ROHS I would suspect copper migration. In my experience an acceptable copper finish should last up to at least 6 reflow cycles. If you have bubbles or blow holes in the solder joint, that is a sign of voids in the walls of the copper barre
Electronics Forum | Thu Dec 06 12:37:14 EST 2012 | deanm
We are having difficulty with bridging on a 2x50 pin 0.050" fine pitch connector using our selective soldering machine. It usually bridges at the end of the row, but sometimes it bridges all the pins together as it drags across (solid bridging). I
Electronics Forum | Fri Dec 07 13:31:09 EST 2012 | kenkay
We had a similar issue and it was fixed by trimming the connector so there was barely enough lead protrusion through the board to show a discernible lead. We had to get a special plate and small machine to cut the connectors, but we haven’t had a bri
