Electronics Forum | Thu Aug 05 17:26:21 EDT 2004 | russ
What happens to the flux and pads on the second side of a double sided board during the first reflow? It seems to me like the solder would dome and the flux would be used up and migrated to other areas. Russ
Electronics Forum | Wed Aug 04 11:34:00 EDT 2004 | Rafal M.
Hello! My problem are solder balls in normal (with Pb) wave soldering proces. Balls appears between connector pads. I tried to change fluxes and preheating in machine (and combinations of both). What else can I do? I have no wide experience in solder
Electronics Forum | Wed Aug 04 16:49:24 EDT 2004 | jim_bob
Regarding Lead Free component finishes, vendors are zeroing in on matte tin plating as the finish of choice. What test are performed, to determine if a finish is "matte" type (vs. non-matte)?
Electronics Forum | Wed Aug 04 18:38:53 EDT 2004 | davef
whiskers / "matte" => no whiskers. Look here: http://nepp.nasa.gov/whisker/anecdote/20year/ There. Nice going. What a buzz killer. I've got to got find some donuts, cold pizza, er whatever.
Electronics Forum | Thu Aug 05 11:37:24 EDT 2004 | Andrew
I was told by the customer to change the screw with washer to a screw without washer as the washer causing the overlay Lexan Material underneath the washer to bulge.What should I be looking at to make this change?Can I just use the same screw without
Electronics Forum | Thu Aug 05 13:48:37 EDT 2004 | davef
We'd guess. What does your customer say? If my customer gave me a written order to do something, I'd do it, unless he was wacked.
Electronics Forum | Thu Aug 05 20:42:11 EDT 2004 | Andrew
If the moisture does not has path to escape,what will happen to the entrapped moisture ,will there be a problem in the asssembly process?
Electronics Forum | Mon Aug 09 11:47:52 EDT 2004 | MM
Hello, I'd like to consult somebody here about how to do the inspection of solderablity of a PWB. what is the root cause about the cold soldering in SMT.
Electronics Forum | Tue Aug 10 15:19:09 EDT 2004 | davef
Hey Bob, turn DOWN the volume. Waint daff yano!!! On the surface of things, if you�ve been to a dozen board houses that have not been able to properly separate boards, we�d kinda be inclined to think it�s you and not them. [In your defense, we hav
Electronics Forum | Thu Aug 12 14:50:12 EDT 2004 | russ
This is interesting, I was once told by a PCB supplier that "soft gold" was immersion and the "hard gold" was the plated. But I agree with Dave F., Chris, what's going on? Russ
