Electronics Forum: seeing (Page 4 of 706)

Repeated reflows

Electronics Forum | Thu Aug 26 22:44:40 EDT 2004 | Indy

We do perform multiple reflow only for reliability testing. 90% of the time we have not seen any change in the solder joint and no change in electricals. If you do see failure you might want to see the solderability of the surface finish too.. jus

Lead Free ...

Electronics Forum | Thu Sep 29 12:06:47 EDT 2005 | Dolby Laboratories

Try seeing if this has any answers - its just been published See http://www.smartgroup.org/experience/experience%20report%202005.pdf

MLCC crack detection

Electronics Forum | Fri Sep 03 16:47:40 EDT 2004 | davef

Rob's comments make sense. Responding to your question: * Sometimes you can see a resistance change * Sometimes you can see a leakage change

Solder dust

Electronics Forum | Mon Mar 07 20:33:35 EST 2005 | KEN

Rule 1: Clean it as soon as you see it! Don't let it dry. It's harder to clean up and can be easily injested when in a dry powder form. Rule 2: See rule 1

Black pad on BGA after removal

Electronics Forum | Thu May 05 16:02:43 EDT 2005 | russ

I don't believe that you are seeing black pad. I think you are seeing an oxidized pad from your statement that these pads take solder. I would guess that these will be fine. But I would re-tin all pads prior to attaching the BGA to make sure.

Drying after aqueous wash

Electronics Forum | Thu Aug 03 16:42:48 EDT 2006 | Merle

The cleaner does have a dryer, but does not remove all moisture - we can see that. It is functioning - we can see that too.

Help identify missing smt component

Electronics Forum | Wed Aug 09 09:56:49 EDT 2006 | russ

Can you see the little dots on top of part? there should be three colored dots. If you can see then that tells you the value. Russ

Quad 4c Nozzle Height Saga

Electronics Forum | Tue Oct 10 12:34:43 EDT 2006 | bobpan

Larry, Do a runstep nozzle then open the door and look and see if the nozzle is all the way on. Push up on it and see if it moves up

Questions on underfill process

Electronics Forum | Mon Jun 11 10:44:36 EDT 2007 | mumtaz

Sirl, who are you to say we hardly reply to poastings? Look below and see how many replies you see. then you can reply yourself with the reason why you failed to burn any of us.

Blowholes during wave soldering

Electronics Forum | Thu Sep 27 09:28:42 EDT 2007 | jgrootkoerkamp

Thanks for all the answers. Is it also possible with lead free soldering to produce little holes in the solder that are not blowholes? We see holes where you can see the end of the hole (not very deep). The holes are always on the same places.

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