Electronics Forum | Tue Jun 01 07:17:00 EDT 1999 | Vinesh Gandhi
Dear All, We are a medium sized sub contract manufacturing house, engaged in high mix, medium volume production. We are using no clean as well as Aqueous cleaning process. we are planning to buy a new wave soldering machine out of the following op
Electronics Forum | Wed Jul 17 03:36:00 EDT 2002 | robbied
Answers are: *Mainly copper and potassium. *it looks like a soft growth. *customer will not accept this, hence the returns. These boards are either reworked or scrapped. *Flux is not an issue. *The cleaning process has been found to be the cause of t
Electronics Forum | Mon Sep 26 15:17:54 EDT 2005 | Amol
Hi, I am spray coating PCB's with the above mentioned coating. The problem is that as soon as the boards are coated, there are pin holes on the surface that subsequently turn into localized areas of dewet on te PCB (its almost as it the coating is fl
Electronics Forum | Fri Oct 14 17:08:36 EDT 2005 | Mika
What? That is easily done. With a 127 micron stencil thickness and apertures made for a QFP 0.5mm pitch... Remember from school of how You squeeze a media under a certain presure (like air), from a bigger diameter towards a smaller nozzle, You will i
Electronics Forum | Wed Feb 01 11:47:07 EST 2006 | Mike
James, If you have a true MSD issue, then baking them AFTER your reflow is not going to fix the issue. I would have to agree with GS and look at trapped cleaner media (if your not No-clean) under the components, or inside connectors. If your runnin
Electronics Forum | Tue Aug 19 03:20:39 EDT 2008 | dlocampo
Basically, Brushing the pogo pins with dry anti-static brush will help but, cleaning it using solvents is not that advisable because it only leaves some residue that will further cause contact problems. Looking at the picture it seems that the UUT's
Electronics Forum | Tue Jul 28 01:39:32 EDT 2009 | Sean
Hi All, I have some question about flux residue resulted from non clean process as following: 1) Under what kind of circumstances that flux residue could appear? This residue does not happen during production but did appear after some period of ti
Electronics Forum | Wed Feb 03 22:05:24 EST 2016 | mac5
Our company being an automotive supplier is all > about quality control, not a clean room > requiremen, This is a no clean process, all > surface mount boards and Solitec ovens. > Hopefully this answers your questions. Greg Hi Greg, Are you
Electronics Forum | Tue Aug 30 15:05:23 EDT 2005 | Shean Dalton
Dear Ing, Have you analyzed why some RF device aren't operational after washing? An assumption is that failures are related to the ultrasonic energy applied. Other possibilities are for poor rinsing, poor drying, inadequate washing on those failed
Electronics Forum | Mon Mar 25 21:45:22 EDT 2024 | buckeye
I got an inquiry from one of our electronics labs with regards to their soldering processes. They use eutectic (63% Sn, 37% Pb) solder. For liquid flux they are currently using Kester 186, which is an old-school, full rosin (RMA and ROL1) flux that c
