Electronics Forum | Mon Feb 10 10:41:29 EST 2020 | SMTA-Tony
Hello Phil, As the other respondents have mentioned, the cooling rate is not easily controlled and varies based on the oven and board design, as well as the settings of the last few zones and cooling zones. In general, the board is going to cool in
Electronics Forum | Fri Apr 03 10:29:29 EDT 2020 | stephendo
Time. The virus does not last a very long time on surfaces. Not sure how long but I read that it does not live long on copper but does last on stainless steel. As far as I know the virus lives as well on gloves as it does on hands. So you still have
Electronics Forum | Mon Jun 15 16:31:25 EDT 2020 | rgduval
You may find some wetting issues running LF HASL with 63/37, as your reflow temperatures will be significantly below the LF reflow. On fiducials...if you don't have a quote for your boards with ENIG, I would recommend at least checking it out. It's
Electronics Forum | Tue Oct 20 05:47:42 EDT 2020 | Mike Konrad
Most often, dull solder joints (post cleaning) is a result of the cleaning chemical. Most (not all) modern cleaning chemicals are equipped with corrosion inhibition agents which prevent dulling. Check with your chemical supplier to see if your specif
Electronics Forum | Tue Feb 09 18:53:20 EST 2021 | SMTA-64387083
You'll have to do at least 2up array since most conveyors won't handle boards less than 2in wide. I'm assuming it's FR4 lead free temperature material and PCB's are scored in the panel. The 13-16in lengths aren't a problem other than depaneling. With
Electronics Forum | Thu May 13 09:52:34 EDT 2021 | winston_one
Want to update this question a little, I know it appears few years ago, but I hope there is some updates... We have to assembly few samples of motherboards with this kind of finish (customer mistake during pcb order). Normally we can use leaded sold
Electronics Forum | Thu May 13 20:40:25 EDT 2021 | winston_one
Yes, we can't use pure Pb PROCESS. And as I say we will not use it anyway, as we have lead-free BGA's, LGAs, component with Solder Charged Terminations... It's became almost normal practice to solder it with leaded solder pastes. In this case peak re
Electronics Forum | Fri Jun 25 11:35:27 EDT 2021 | stephendo
This And do not underestimate the importance of support. The product has to work. Forget the jargon and details. Does the product do what it says? If it doesn't work well is there someone to explain why? Maybe it needs a higher temperature. And c
Electronics Forum | Wed Apr 13 12:10:47 EDT 2022 | winston_one
Hello! We have a strange effect. Some pads of big trough-hole DDR slot just dessapear. Initialy it was soldered with selective soldering process (leaded, 290 degrees, ImSn finish, very short storage). Then some connectors with poor barrel fill we hav
Electronics Forum | Wed Jun 29 12:31:32 EDT 2022 | proceng1
I don't know about that paste, but I can give my experience trying intrusive reflow (pin in paste). Using standard Lead-Free paste, we often had issues. It seems that many ROHS parts can't actually handle reflow ROHS temperatures. So the fact that
