Electronics Forum | Fri Apr 03 05:25:31 EST 1998 | Donnacha
Hi all, Could someone suggest a web site that contains good representations and pictures of SMT solder related defects?? I need to compare these with some pictures I'm using for a project presentation this week. Thanks, D.
Electronics Forum | Wed Aug 01 18:42:23 EDT 2018 | deanm
How close are your SMT pads to the gold fingers? Can you supply a photo?
Electronics Forum | Tue Dec 27 10:18:03 EST 2016 | anhsang38
Dear Pro, I want to confirm with you about conveyor speed. is 1m/s? We are using wave soldering but it is 1.2m/min, min not second. Pls, check it agian. The flux is not relative this error. It is relative no sodering, bridge. The solder bar is the
Electronics Forum | Tue Aug 14 09:39:31 EDT 2018 | stephendo
Every place I have ever worked has taped off the gold fingers. Maybe not the first run but within a few runs.
Electronics Forum | Fri Jul 27 13:51:53 EDT 2018 | vlad_saviuk
Hi, have some question: during solder paste printing I'm faced with problems on the edge of the PCB - solder balls on gold pads. During analisys we checked everything - change squeegee preasure, different cleaning cycles, squeegee speed - no effect.
Electronics Forum | Tue Dec 27 06:52:34 EST 2016 | luciano
Thanks for your advice. I've tried setting the temperature up and even measuring the temperature at the wave itself but had no luck at all. I've also tried using temperatures going from 245 ºC up to 260 ºC. The amount of flux was adjusted as well a
Electronics Forum | Sat Sep 14 12:24:44 EDT 2002 | scottefiske
We need to remember here that as printer manufacturers were enhancing their product lines, miniaturization was quickly being developed in the background. In the last 2 years I was involved in developing and conducting a D.O.E./F.M.E.A in determining
Electronics Forum | Sun Sep 15 15:08:00 EDT 2002 | jersbo
My 2 cents... Screen printing may very well have a leg up on deciding SMT defects... however if you pay attention to your stencil (aperture size ratio etc..) and inspect your prints... I believe its a much lesser number... (paste MFG also plays a ro
Electronics Forum | Fri May 31 08:51:09 EDT 2002 | zanolli
Hello Dave, As related to connector mating interface, fretting corrosion is the oxidation of the contact points, causing high resistance across the interface. Fretting corrosion is caused my micromotions in the interface exposing the metalized conta
Electronics Forum | Thu Jul 23 16:49:04 EDT 1998 | Ted
I was wondering how successful industry has been in quantifying relationships between defects rates of particular solder problems (like bridging, opens,..) and PCA design parameters (like spacing, part orientation, pad dimensions, ...). For wave sol
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