Electronics Forum | Thu Apr 05 09:18:14 EDT 2007 | pjc
Please note that pin holes and blow holes are not always defects. The latest IPC 610A Rev D workmanship standard has them as process indicators- depending on Class. I don't have the document handly while writing this. It would be good to look that up
Electronics Forum | Sun Apr 15 18:06:16 EDT 2007 | greg york
You may need slightly longer dwell times and a little more heat in the reflow and wave to ensure proper alloying/wetting. Also consider if you are using a nickel doped and high copper alloy on bare boards in Leaded wave solder bath you will pick up c
Electronics Forum | Mon Feb 02 11:57:39 EST 2009 | allwave
Hello everybody, We are running a product through wave solder process using three different PCB suppliers. I have noticed that you can see more flux residues (water-based, No-clean flux) on one supplier than on the other two. All three PCBs run unde
Electronics Forum | Tue Feb 03 03:57:37 EST 2009 | sachu_70
Hi George, I would suggest you to re-look your process parameters, especially for the pre-heat temperatures and the amount of flux deposited. The mask properties and that of your flux also play a role, but you could zero down to the root cause after
Electronics Forum | Fri Aug 12 17:36:06 EDT 2011 | grics
Dave is correct. Also, you should check the TDS's of the caps and the display before processing to see if they can withstand the process temps, look for a recommended solder profile or info for the manufacturability of the device. On another note,
Electronics Forum | Sat Aug 13 10:56:57 EDT 2011 | jldowsey
Process Flow #4 in davef's response is your best bet for this assemblly judging buy your pictures. We purchase our selective wave solder pallets from Ascentec Engineering - they can fabricate a pallet to hold your assemblies, keep the SMT devices pro
Electronics Forum | Wed Mar 19 12:36:04 EDT 2014 | joeherz
We have an application where an assembly has to be residue (flux) free except for 2 SMT non washable parts. Currently those parts are post wash hand adds but the product volume is exploding. We want to run those parts in SMT, mask them using an aut
Electronics Forum | Thu Jul 17 20:20:21 EDT 2014 | mac5
Hi June, The biggest issue with an OSP finish is as soon as the PCB sees a heat cycle (reflow or wave) the finish will begin to degrade. If you have a single sided SMT assembly with THT components installed downstream it works pretty good. But a dou
Electronics Forum | Wed Apr 22 20:41:39 EDT 2020 | SMTA-Samy
We use Wondermask 2211 and we haven't had issues with the material creating gunk in the pot. You might want to call TechSpray and consult with a product specialist who can better advise you on what's best for your application. Rob mentioned the wave
Electronics Forum | Fri Feb 11 10:14:54 EST 2000 | C.K.
Dave, to answer your questions, point-by-point: � Just out of curiosity, how are second side, skippy components oriented on the board with respect to the wave? The SMD's are all oriented in the "correct" direction with respect to wave direction(i
