Electronics Forum: solder problem (Page 2 of 507)

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Thu Sep 11 11:27:41 EDT 2008 | rarnold

YES! Reflow Profile knobs have been verified.

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Sat Sep 06 03:48:29 EDT 2008 | rameshr

hai, we r using type 4 solder paste in our pcb assembly process - we are now facing the following problem. 1. two component pads soldering was seemed uncoalesced soldered joint except all the other components. 2. what will be the problem & solution f

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Wed Sep 10 12:56:26 EDT 2008 | vladig

No arguments there. I 100% agree that quality engineers can and do solve a lot of problems on the spot. I've nevern said "run an analysis as soon as you get a problem". The whole nine yard started with a solderability problem. In my previous product

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Wed Sep 10 10:49:23 EDT 2008 | slthomas

You missed my point. People often don't find the need to post their problems here to begin with because "knob turning" solved them *before* they needed to lean on the collective experience of SMTnet, Technet, or what-have-you. Your posts seem to b

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Wed Sep 10 15:54:57 EDT 2008 | slthomas

"When we solving a problem we have to be absolutely sure it's really solved." Conversely, it's always good to return things back to the way they were when you conclude that THAT knob turn didn't solve the problem.

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Thu Sep 11 11:12:52 EDT 2008 | aj

Hi, I had similar problem a while back. Diagnosis was a combination of two things: 1 - Gold thickness was below spec. which gave us solderability problems. There should be other areas of the board that show signs of this. 2 - The devise in queast

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Wed Sep 10 10:04:52 EDT 2008 | vladig

And I bet you are not alone :-). All I'm trying to say is that there are problems which can be fixed by knob turning, but there are also others which can not. So, the appropriate analysis should be done to find the root cause and fix them. In the re

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Sat Sep 06 10:09:57 EDT 2008 | davef

We can't help but wonder: * What are the measured temperatures on a good solder connection and the picture connection? * Why use use Type 4 solder paste?

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Tue Sep 09 11:15:49 EDT 2008 | vladig

I wish i saw at least one problem posted here being solved by the "knob turning" technique

Uncoalesced solder problem in fine pitch IC pads

Electronics Forum | Tue Sep 09 17:14:04 EDT 2008 | slthomas

Perhaps people are solving their problems by turning knobs and thus not finding the need to post here.


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