Electronics Forum | Thu Mar 26 23:17:04 EST 1998 | Marty Fox
| | | Is there anyone out there required by their customer to clean the finget tab contacts even after using noclean paste? We have been asked to clean even though we don't have any flux residue on the contacts. Any ideas? | | | Mike | | | | Yes a
Electronics Forum | Sat Jul 17 13:25:02 EDT 1999 | Scott
| | | | | | I need a good chemical to remove the lacquer finish off of magnet wire. I know there are different kinds but I need one that really works. Any suggestions would be great. thanks in advance guys. | | | | | | | | | | | What is it you're tr
Electronics Forum | Wed Dec 07 12:28:37 EST 2005 | PWH
I have seen problems similar to this caused by too high concentration of cleaning solution used in ultra-sonic cleaning process. If cleaning solution is used, make sure it is compatible with solder process. Also, improper mixing of fluxes and solde
Electronics Forum | Tue Feb 03 13:53:41 EST 2009 | allwave
The spec for all PCB suppliers is "solder mask over bare copper using LPI on external layers (green)". The flux we use is No clean 270WR flux (AIM). As far as process parameters, like I mentioned before, same parameters for several suppliers, only on
Electronics Forum | Wed Feb 04 16:33:40 EST 2009 | davef
Your specification for all PCB suppliers of 'solder mask over bare copper using LPI on external layers (green)' is broad and open to the use of material from many possible LPI suppliers by your board fabricator. In at least one case, it appears that
Electronics Forum | Sat Feb 05 09:08:18 EST 2000 | Dave F
Casimir: Let me expand on something that I said in my response to your thread on ionic testing. Generally, no-clean people don�t use ROSE testing as part of their process control, because the ROSE test is essentially washing your board in DI/IPA �
Electronics Forum | Mon May 09 11:29:05 EDT 2016 | jpal
I wanted to bump this up. I am having the same problems. I cannot convince folks it is a solder mask issue and not our process issue, even though it shows up after wave and wash. I can heat the boards and even send them back through the wave preheate
Electronics Forum | Mon Feb 20 09:20:07 EST 2006 | dpmilk
It appears to us that the problem lies in the lead-free solder paste rather than the inductors. We have not found a lead-free solder that does not do this. The green is on the copper wire. We believe it gets there during the reflow. The gasses fr
Electronics Forum | Fri Apr 16 11:03:35 EDT 2004 | davef
Your copper corrosion is not good. It indicates that you have not done a good job in cleaning. [We assume this is a medium green color, not unlike the color of the solder mask on your board, that is almost like a translucent lacquer; rather than th
Electronics Forum | Fri Apr 26 10:42:28 EDT 2002 | Jim M.
I worked for a telecom company that had sites in the deserts, jungles, mountains and regular built up area's. All boards were built using Aim 291/293 No clean solder paste. (all boards built to Bellcore standard) The boards were coated with Dymax ur
