Electronics Forum | Wed Nov 29 01:25:53 EST 2006 | callckq
Dear All, I have 1 product that using solder bar from vendor called Asahi. After wave process, we found quite a sticky flux residue remain on the board. Eventually, have huge impact on our ICT fisrt pass yield(FPY). Current FPY is a the range of
Electronics Forum | Tue Aug 18 12:14:59 EDT 2009 | zanolli
We are looking for suppliers of liquid vapor degreaser batch equipment for flux residue cleaning of PCB’s. Any recommendations? Thanks
Electronics Forum | Mon Jul 26 16:31:02 EDT 2004 | Sue PH
We use Kester 186 flux and the STU people would sometimes find white residue after cleaning with Isopropyl at the solder station. We have Lenium (Petroferm)in our vapor degreasers, and now they use Lenium at their stations as well as final clean, an
Electronics Forum | Wed Dec 20 04:34:10 EST 2006 | greg york
Consider it done Cheers Greg
Electronics Forum | Fri Jul 23 14:41:41 EDT 2004 | Steve Stach
Dear JSK, It sounds like the root causes of your problem are two fold. First, excessive heat will polymerize the abietic acid found in rosin forming neo-abietic diamers and polymers which are much less soluble than the parent monomer. There are
Electronics Forum | Wed Nov 29 09:25:42 EST 2006 | russ
So why are you telling us about the solder bar? What is the flux? that is what you need to change, you have a rosin based flux it sounds like. you can change probes in test fixtures or change flux chemistries. Russ
Electronics Forum | Wed Jul 21 17:49:52 EDT 2004 | jsk
problem: Too many solvents and boards are not clean Flux remains on the board after vapor degreaser and "Powdery" white residue after vapor degreasing Flux type is kester 186 Process: hand solder High Temp alloy, spot clean after hand solder e
Electronics Forum | Wed Nov 29 11:56:10 EST 2006 | CK the Flip
For the better part of my career, I've battled with ICT guys on so-called "flux residues" on their test probes, and this was when using NO-CLEAN, 2% to 5% solids tops, flux. People don't understand that ICT probe maintenance is an inherent part of
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 Nov 29 09:54:05 EST 2006 | jhaviland
Washing these boards would be a great help. The flux will build up on the probes and possibly corrode them depending on it's composition. Aim for a process that will burn off the majority of the flux, or change chemistries if washing is not an opti
