Electronics Forum | Sun Oct 29 22:41:29 EST 2006 | hanocete
We have a current problem on our packages after we bake it for 24 hrs prior BGA rework. Flux or white residues found on the connector leads and terminals that cause not contact problems during mating. Could you help us how to clean the fluxes properl
Electronics Forum | Tue Oct 31 01:32:47 EST 2006 | hanocete
thanks for your reply, actually we bake the PCB assembly prior the rework because the package was exposed for quite some time already. The baking time was 24hrs @ 125 deg.C. We notice that there were flux residues on the connectors after the baking.
Electronics Forum | Mon Jan 12 02:56:42 EST 2009 | sachu_70
Hi Bill, You should try pre-baking any such old devices prior to using on SMT Reflow. Refering to MSL-type3 guidelines could help in your case.
Electronics Forum | Mon Nov 09 09:44:22 EST 2015 | davef
Purpose. This describes setting-up a wave soldering system set-up for a new assembly design or checking a wave solder machine operation with a test board. Applicability. To be used for new design printed circuit assembles and during machine accept
Electronics Forum | Sat Aug 27 09:17:17 EDT 2011 | davef
We assume from the way you wrote the posting that we're talking about bare boards delivered from your fabricator. If that's the case, the best way to clean these boards is to tell your supplier to clean the boards before sending them to you. You shou
Electronics Forum | Tue Sep 10 10:42:36 EDT 2013 | capse
Plasma cleaning is used extensively to clean surfaces prior to wire bonding.
Electronics Forum | Tue Aug 02 21:37:21 EDT 2005 | davef
Are we talking: * BGA that you've reballed and want to clean prior to attachment to a circuit board? * BGA that you've attached to a circuit board after correcting something or other? ... and we're talking a water soluble flux or what?
Electronics Forum | Tue Jun 05 16:40:46 EDT 2001 | kerryn
Thanks Phil. However, my objective is to identify stencils that are not 100% clean prior to sending to inventory. I want to catch it before the solder paste has a chance to dry and harden in the apertures. Kerry
Electronics Forum | Fri Jan 05 09:23:10 EST 2001 | Brian Toleno
While there may not be any specific requirement to cleaning prior to coating, cleaning an assembly prior to coating will only serve to increase the reliability and integrity of the coating. Some residues from low-solids fluxes can interact with conf
Electronics Forum | Thu Jan 04 17:26:17 EST 2001 | Cory
We're going to begin conformal coating a few of our assemblies as required by our customer. We're using Kester No clean paste and will use cotton gloves to keep the boards clean while handling. My question is: Do we need to clean the boards prior to
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