Electronics Forum | Thu Jul 12 20:53:59 EDT 2001 | davef
Hussman: Please help us understand how knowing the profile will point us in the direction of how solder got under solder mask.
Electronics Forum | Thu Jul 05 21:42:28 EDT 2001 | davef
Most of our boards are fabricated with solder mask over bare copper [SMOBC], but we have couple where the solder isn't removed before masking. And ever so offin they's a liddy bit mo' solder than we'd like, which when reflowed, ends-up connecting so
Electronics Forum | Fri Jul 06 18:19:41 EDT 2001 | davef
The senior staff have the pictures!!! Oh, that�s just GREAT!!! What the blank are these gerbils doing with �em? Nothin�!!! They�re probably sitting in a folder on whatzisname�s desk, until he has "a change to study them more". [Like he�s going t
Electronics Forum | Fri Jul 06 00:22:49 EDT 2001 | DL
Thanks Dave, and yes we can leave the solder there in this instance. These panels, 12up, are NCMR from the customer. The customer is saying that after the panels have been reflowed 5 times! solder starts to accumulate under the mask. Get this, My sen
Electronics Forum | Mon Jul 16 08:56:56 EDT 2001 | Hussman
Easy, DL says the customer is telling him after 5 reflow processes they get solder under the mask. He tried it and didn't see anything. DL needs more information to understand why and where this is occurring. So, if he can't duplicate the problem
Electronics Forum | Thu Jul 05 20:30:00 EDT 2001 | dlkearns1
I've never seen this and was wondering how bad is this? We've tried to re-create this defect, but could not. Comments????????
Electronics Forum | Thu Jul 12 10:45:42 EDT 2001 | Hussman
Since your customer is complaining, you'd better be pro-active. Doesn't mean they're right, but without customers, life sux alittle. Anyway, ask them for a profile of the 5 reflow processes. If they don't have that and you have a profiler, ask if
Electronics Forum | Fri Jul 13 01:34:13 EDT 2001 | dlkearns1
Quick update on my issue of " wicking ". I had some talk with the company QA guy. Told him I saw no wicking on the test panels at 30X. The next day he came up to me and said, he kinda saw a little something at 60X then verified that at 100X, So, he
Electronics Forum | Mon Jul 16 22:40:02 EDT 2001 | davef
Speaking of people we'd like to pimp slap, why did the not-so-quality guy decide to ship defective units, anywho? This sorta says we can't blame the customer any longer. So, it's either blame the fabricator or umm er, sorry to say this ... YOU DL,
Electronics Forum | Tue Oct 19 19:25:40 EDT 1999 | Jeff Sanchez
Carol, I think the guys are right about you stand off problem but I want to address the wrinkleing of your masking. Although I think the temps you are subjecting the board to are very high and more than likely creating problems of their own. I th
