Electronics Forum | Thu Apr 21 14:06:28 EDT 2005 | russ
Dang Patrick, I'm going to have to agree with you again. The design needs to be corrected. This multiple footprint is a common thing nowadays but the designers need to understand the dynamics of reflow and such. PWH - Why would this mask need to
Electronics Forum | Tue Jun 21 21:54:34 EDT 2005 | Zeta
PCB BOARD - After removal of the BGA from the PCBA. In the midst of removal of the solder at the PCB, the green mask was scratched. If we do not repair the green mask, the whole board will have to be scrapped. Which repair kit do you recommend. W
Electronics Forum | Tue Jan 17 09:30:35 EST 2006 | John S.
Anyone ever see problems with peel mask causing ionic contamintion/dendritic growth? Is there a preferred material for a no-clean soldering process? Thanks in advance, John S.
Electronics Forum | Fri Feb 23 01:44:33 EST 2007 | josaf
now we use Solder mask from peters.de but it too thick so we can't use process for screen epoxy
Electronics Forum | Wed Aug 22 22:07:53 EDT 2007 | mdm4ua
Easy fix is put a drop of washable mask on the side of part before reflow. The mask dries before the solder reflows and holds the part in place. After reflow it washes away.
Electronics Forum | Wed Jun 18 08:07:58 EDT 2008 | davef
Here is a link to a basic discussion of solder mask application methods: http://www.ami.ac.uk/courses/topics/0221_smp/index.html
Electronics Forum | Wed Jan 14 06:41:08 EST 2009 | andrzej
I did not tried this before (never hada chance to do it) but I considered such option - maybe try using temporary wavesolder mask on such small components. Run both sides of PCB through SMT oven and then mask 0402 completely and go with wavesoldering
Electronics Forum | Thu Apr 09 06:28:11 EDT 2009 | qualityguy
We have different Solder mask 'gloss' and 'satin' the gloss has a surface energy =40 dynes. The test evidence to date is strong correlation between surface energy, mask type, HASS failure
Electronics Forum | Fri Oct 07 09:00:03 EDT 2011 | blnorman
2D codes take up much less real estate so that might work. Something else we did was to go to CO2 lasers and mark directly into the solder mask. Underlying copper gave adequate contrast to the green mask. Much more of an investment, but works grea
Electronics Forum | Fri Nov 04 16:36:53 EDT 2011 | davef
tombstonesmt: Ammonia based masks can create solderability issues after they are removed. You can get non-ammonia based latex mask material but down side is slower cure and cost a little more as they have higher levels of latex etc
