Electronics Forum | Tue Dec 11 10:12:36 EST 2007 | George
Hi everybody, Is there any criteria as far as No-clean flux residues surrounding solder joints when using selective solder machines? I have a Novastar SPA 400 and use flux NC kester 959. If I decrease the amount of flux, then I experience problems w
Electronics Forum | Thu Dec 13 08:02:02 EST 2007 | realchunks
You may want to try raising your pre-heater if you have one. I would also suggest trying different fluxes that may be a little more active so you can use less. What type of fluxer are you using? Selective solder flux residue is a gray area. This i
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 | 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 | Mon Feb 02 18:05:20 EST 2009 | stepheniii
What flux are you using? We use a low-solids No-Clean water-based flux. Maybe some of what you are seeing is not residue from the flux but is from reaction with the solder mask.
Electronics Forum | Tue Feb 03 15:23:21 EST 2009 | gregoryyork
Hi George This is down to the different cure temperatures used during PCB process. No problem with the flux or your settings You should be seeing a waxy greasy oil like substance on the dirtier board. Or the resist has absorbed the flux residues not
Electronics Forum | Mon Feb 02 11:57:39 EST 2009 | allwave
Hello everybody, We are running a product through wave solder process using three different PCB suppliers. I have noticed that you can see more flux residues (water-based, No-clean flux) on one supplier than on the other two. All three PCBs run unde
Electronics Forum | Mon Feb 02 16:49:05 EST 2009 | davef
Questions are: * What are the soldermasks used by your three board suppliers? * What tests have you run to assess the compatibility between these three soldermasks and your flux?
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 | Wed Aug 19 17:53:17 EDT 2009 | aqueous
This is not a common method of defluxing. Vapor degreasers were the top choice pre-1989 but have given way to spray-in-air defluxing technology. Here come of the vapor degreaser manufacturers: Detrex http://www.detrex.com/ Baron Blakeslee http://
