Electronics Forum | Wed Feb 11 14:55:52 EST 2015 | erezah
we received assembled PCBs with spots that look like a bleach spots all over the PS and CS . The board house said that this is normal due to flux aqueous wash process. Can it cause problems (e.g. corrosion ) in the long run or cause issues when wor
Electronics Forum | Thu Feb 12 08:35:22 EST 2015 | davef
Solder mask is intended to protect the traces from the soldering process. That's it. [Tried to upload a picture. It's broken.]
Electronics Forum | Thu May 19 03:39:04 EDT 2016 | jpcwg
Design application software in resistance welding layer options to carry on the design, can put the resistance welding options this functionality, born PCB board factory to actual production of PCB design are window. we are professional PCB manufac
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 | Thu Feb 12 07:58:54 EST 2015 | erezah
A-610E, 10.7.4 covers solder mask discoloration. > Use that for your disposition > > In a previous > thread, Boardhouse told us "Here are a couple of > things that can affect color. * Material color > is the major, * Matte green from Enthone wou
Electronics Forum | Wed Feb 11 17:04:47 EST 2015 | davef
A-610E, 10.7.4 covers solder mask discoloration. Use that for your disposition In a previous thread, Boardhouse told us "Here are a couple of things that can affect color. * Material color is the major, * Matte green from Enthone would be different
Electronics Forum | Thu Feb 12 12:30:16 EST 2015 | stevezeva
I remembered something from the TechNet a long time ago about heating the board with a heat gun to see if the white spots disappear. I searched the archives and found this from Bill Kenyon: Quick identification of solder mask white spots- if it is t
Electronics Forum | Mon Mar 21 20:37:36 EST 2005 | KEN
What does the filter housing smell like (inside)? How often do you change filters? The smell is probably from organic growth. Do you have slime growing on the inside walls below the water line? Does the bleach temporarily fix the problem? What is
Electronics Forum | Mon Jan 07 21:07:00 EST 2002 | davef
Using a flux pen sounds like a good idea. Comments are: * I assume you�re talking aqueous flux. If not, some NC flux pens leave white residues. Nearly all of 15 samples suffered to varying degrees with white residues. * Use the same flux that you
Electronics Forum | Thu May 01 18:37:31 EDT 2003 | gregoryyork
Did you get any dulling of the solder joints at all or importantly was the resist discoloured or bleached after cleaning. It is possible to absorb flux and saponifier into the resist and this will definately cause poor SIR or electromigration especia
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