Electronics Forum | Tue May 11 10:43:37 EDT 2004 | Melissa
Has anyone experienced problems lately with excess flux residue left on the board after reflow when using Alpha UP78 OSP paste? We are getting a component failure that the designers are blaming on too much residue. Thanks
Electronics Forum | Mon Jul 26 14:58:52 EDT 2004 | cisridn
I am new to the No-Clean Process. When preforming rework in a No-Clean Process, should the rework technician clean the excess flux used to change a component or place a component missing?
Electronics Forum | Thu Jun 08 17:13:41 EDT 2006 | davef
We don't agree that "a little to the top would just even things out". The raw flux on the top of the board never touches the wave and so, does not receive the proper amount of heat for activation, except at the through hole barrels. * We assume WML
Electronics Forum | Tue Aug 22 05:10:56 EDT 2000 | Wolfgang Busko
Ron:It�s tricky to get what you want with this foamfluxers espacially using pallets. They got to be cleaned regularly. Most of the time excessive residues are removed using brushes which adds another process step. It should be better using a sprayflu
Electronics Forum | Thu Dec 21 08:45:40 EST 2000 | Hussman
I've been asked to "heat up the oven profiles" to "burn off" the excessive flux so our vision equipment can inspect solder joints. 1. I am using Multicore SN 63 no clean solder paste. 2. We use CR Technology Vision Inspection. Before I get too
Electronics Forum | Tue Sep 25 15:48:34 EDT 2001 | mparker
Scavenge all the old solder off the board and the chip. Micro screen paste to the chip. As far as thickness, check your aspect ratio to determine the spec. Eliminate just one variable at a time to get to the root cause. Start by not using the tacky
Electronics Forum | Mon Oct 01 04:01:08 EDT 2001 | wbu
You got the right feeling for that I guess but what if somebody else is doing your trick, is it still repeatable? Personally I wouldn�t trust that method more than the brushing. Did you try the dipping method ? The thing from Dave with this "card-com
Electronics Forum | Tue Feb 24 09:47:45 EST 2015 | rgduval
Well, since you're looking at a water soluble flux from AIM, I'm guessing you wash the boards before you conformal coat them. Thus, I wouldn't expect any interaction between the excess flux that you're washing off of the boards and the Humiseal that
Electronics Forum | Fri Jun 07 05:19:23 EDT 2019 | gregoryyork
dont usually see this unless the Rosin hasnt been hardened due to low reflow or excessive pressure on blades squeezing flux out so you have flux rich areas. Are these boards also flow soldered?
Electronics Forum | Fri Mar 17 21:44:14 EST 2000 | sosina_outry
Daren: suggestion from a friend of mine 1. Is residue on the top or bottom of the board? If on the bottom, then you might need to do solder dedross. if on the top, you might need to check 1. after spray flux, check for any excess flux on the top of
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