Electronics Forum | Mon Sep 17 09:47:18 EDT 2012 | mbnetto
Hi, Do you want to replace the SB ou just reflow it again? Do you suspect there is some "colder solder joint" in one of the SB balls ? In my opinion you are heating the board a lot... Did you put some thermocouple on the ball to check the temperat
Electronics Forum | Wed Aug 12 17:18:03 EDT 2015 | dyoungquist
Here is our solution: We run the assembly line 40 hours per week and use 500g cartridges of solder. We take 1 cartridge out Monday morning and leave it out until the end of the Friday shift when it is put back into the refrigerator. That means you
Electronics Forum | Thu Sep 30 12:02:20 EDT 1999 | Wolfgang Busko
| I am having problems processing immersion gold boards. The achieved solder joints appear acceptable a la IPC-A-610, but the resultant joint does not fully cover the land, i.e. you can still see an outline of gold pad. | What is the best way to achi
Electronics Forum | Tue Jan 25 21:59:44 EST 2000 | Dave F
Michael: On reliabiliity, consider that: � IPC-SM-782, "Surface Mount Design And Land Pattern Standard" and IPC-D-279, "Design Guidelines for Reliable Surface Mount Technology Printed Board Assemblies" specifically describe via in pads as "poor des
Electronics Forum | Tue Apr 05 12:31:05 EDT 2022 | proceng1
A while back, we had a yellow coating showing up on some solder joints at Selective Solder (LEAD alloy). I contacted the company for our machine and he looked into it. One change we had made not too long before is we switched from Superior 75 to Sup
Electronics Forum | Sun Feb 06 15:26:32 EST 2000 | Carol Zhang
I have a board which contains brass spacers. The spacers will pass through the wave during soldering. I found a silicon-rubber cap that can prevent solder climbing up into the spacer. However, the cap influence the wave flow and reduce the solderabil
Electronics Forum | Tue Apr 04 07:46:03 EDT 2000 | Donnie
Neil, We currently use only visual inspection with a magnified lamp and actually brush the board after the wave process to help knock off any solder balls. You wanna use an ESD sensitive brush material. Camel hair is what we use. It works real wel
Electronics Forum | Fri Dec 03 19:44:34 EST 1999 | Russ
Hello all, I am in the process of converting our facility to noclean processes. So far I am experiencing troubles with soldering to gold finishes. The finish is an H.P. type1. The solder joints appear dull and grainy. They seem to be very strong
Electronics Forum | Wed Oct 07 03:37:39 EDT 1998 | Christoph Prem
| | Does sombbody know what DPM rate a good and reliable SMT assembly line (incl. solder paste print, assembly and feflow soldering) has? | | | Chris, | It may be helpful if you could translate DPM into a meaningful phrase as many people (myself inc
Electronics Forum | Tue May 26 14:10:24 EDT 1998 | Ryan Jennens
We recently made the switch to no-clean and the wurface mount is turning out beautifully. However, the wave solder process continues to put up a fight; we are getting a white residue on the surface of the PCB. The residue is not localized to just t
