Electronics Forum | Thu Sep 16 01:54:46 EDT 2010 | sachu_70
Hi Gani, Immersion Ag finish has lesser shelf life as it can get more easily oxidized on exposure. However, I see concern in your Reflow profile. A few questions: Have you compared your reflow profile to the solder paste manufacturer's recommended pr
Electronics Forum | Fri Jan 07 03:34:12 EST 2011 | rpatel28364
Hi Smarts We are having difficulty in reflowing BGA wiht ROHS process on double sided board. We have tried profiling un populated board and profile is meeting upper spec of solder paste. but our customer is saying they have to heat up BGA and board s
Electronics Forum | Mon Oct 03 15:13:00 EDT 2011 | tombstonesmt
It sounds to me that it's a heat transfer issue. The solder is only bonding to the lead on not the barrel correct? Does your selective solder equipment have any type of heating source? Can you "dwell" on that particular joint? On some of our products
Electronics Forum | Mon Oct 03 16:02:55 EDT 2011 | artposada
The machine does not have pre-heating feature. I'm soldering a six-up panel...I've tried putting them a an oven and letting them soak for 20 mins or so at a low temp. But by the time I placed the panel in the machine and manually fluxed the top sid
Electronics Forum | Wed Feb 20 18:21:49 EST 2013 | caurbach
A question for all you wave experts out there: We run our wave with a constant flow over the back plate. I know it's recommended that we set the back plate so that the solder sits just at the top of the back plate with surface tension keeping it fr
Electronics Forum | Tue Sep 19 05:06:05 EDT 2017 | kubabel
Thank You for these hints, we´ve checked whole temp. profile (including dwelling time) and we follow all of specifications to components. Anyway we are still facing approx. once per two months issue with our customer, where only one BGA ball is nonwe
Electronics Forum | Wed Feb 20 11:40:31 EST 2019 | bmalhi
Heller Oven comes with a profile pre-loaded so you can start there. RTS = Ramp to Spike. Basically a straight line from preheat to spike. Also known as “Tent” profile RSS = Ramp Soak Spike. This one creates a flat line around 150-180 degrees on th
Electronics Forum | Fri Nov 15 11:03:48 EST 2019 | rgduval
I think Steve is on to it. The wire is not getting hot enough to wet. Either the solderer is attempting to solder too quickly, or the PTH is connected to a ground plane. The solder sticking up through the hole leads me to think it's connected to a
Electronics Forum | Thu Jul 20 16:42:52 EDT 2000 | Bob Willis
Here are the details for the OU Lead-Free Project Introduction The Open University Solder Research Group aims to facilitate the implementation of lead-free solders by evaluating their mechanical properties, especially those which are influential to
Electronics Forum | Thu Jan 10 22:55:24 EST 2002 | davef
You are sure taking you sweet time getting this thing running. You're getting too much beach time. NOZZLE SELECTION Typically, the only rule of thumb that applies to choosing the correct nozzle ID is that it should be one half of the required dot d
