Electronics Forum | Thu Jun 14 00:58:06 EDT 2001 | plopez
Hello. We are a contract manufacturer that requires the removal of the green making layer on a PCB board. What we need to do is expose some of the conductive trace (estimated .025 length) to create a solder joint to a SMD. It sounds ridiculous, bu
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 Jun 15 13:17:27 EDT 2001 | CPI
Are you exposing so you can solder and SMD component directly to it? If not are there ant vias near by that connect to the area you are trying to expose? If not I have done as Dave suggested using a dremal tool. Messy but it works.
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 | Tue Dec 30 08:55:29 EST 2008 | umamaheswaruk
Hi all, I have couple of questions/doubts on solder mask, please clarify. Why green color solder mask is popular when compared to other solder mask (RED, PURPLE, BLUE etc.). Are there any performance issues with other solder mask if I use them.
Electronics Forum | Wed Jan 14 18:23:05 EST 2009 | boardhouse
konrad, Here are a couple of things that can affect color. 1) Material color is the major, 2) Matte green from Enthone would be different in shad than Matte green from Taiyo. 3) Solder mask is two parts, One the green mask, two the hardner, having t
Electronics Forum | Thu Jan 22 08:51:07 EST 2009 | mefloump
We use green painters masking tape. Comes off easy and doesn't leave a residue. The blue colored masking tape works well also but tears too easily. Ours runs through and IR oven to cure the coating after it runs in our PVA650 and we have not seen and
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 | Wed Feb 05 19:43:34 EST 2003 | iman
If by the Powers Ta Be (customer/designer), you can't change the PCB design, negotiate for the PCB fab house, to block the via holes with their (green?) solder mask some customers/designers want to have via holes to be present in the PCB pad, due to
Electronics Forum | Thu Jun 01 10:48:21 EDT 2000 | Jeremy
I am having a problem with the green solder mask flaking off exposing bare copper. The mask was defective from the board manufacturer. My problem is the boards are already assembled and we are just finding the problem. Is there a standard that cover
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