Electronics Forum | Wed Apr 15 15:24:40 EDT 1998 | D.Lange
| I am looking for a product to repair PCB mask (seal exposed copper) and fill Gouges in pcbs, any suggestions? Try this stuff no mix no mess comes in green and clear and maybe other colors. Dries readily at room temp and is in pen form for easy disp
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 | Tue Feb 06 18:19:30 EST 2001 | davef
Now that's surprising that your board fabricator would say the mask was cured properly [without even inspecting the boards]. I wonder if they can backup those BOLD words when testing your boards with the webbing problem. The reason you can�t find t
Electronics Forum | Fri Jul 06 15:45:50 EDT 2007 | hussman
I have to agree with the fat green guy. And with Real Chunks too. You should also run a matte mask on your board. This will help in preventing shorts.
Electronics Forum | Mon Jan 05 09:59:51 EST 2009 | prkonrad
HI, i work for an EMS company and i got a few remarks on the solder mask question. In the manufacturing of PCBs there should be no difference if they use other color solder mask, but in the production of electronic assembly it could make a difference
Electronics Forum | Thu Feb 04 12:01:07 EST 2016 | g2garyg2
Hi Luis A white mask typically helps in the marking process since you are not reliant upon the PCB layers to create the contrast. Laser marking is really an etching process, so if your laser is set properly (power and focus) the goal with mask is to
Electronics Forum | Fri Sep 11 15:27:50 EDT 2015 | u4bga
Hi! We're noticing white spots on 2 PCBAs after the selective soldering & DI Wash processes. ----Facts---- 1) The marking is on all boards, irrespective of date code 2) It only happens on leads that have been selective soldered 3) The pattern of w
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Electronics Forum | Mon Aug 28 17:04:52 EDT 2006 | Board House
ImSn - Immersion Tin - Not Recomended- short shelf life ImAg - Immersion Silver - Prefered Surface finsh by most Board houses, Best reworkablility, 12 moth self life, ENIG - Electroless Nickel Immersion Gold - Second Choice for Board Shops, 12 -
Electronics Forum | Tue Jan 13 10:35:06 EST 2009 | evtimov
konrad, why did you change your mind now? Now you can agree with PCB manifacturerers? I didn;t hear anything in their defense and you gave up. If colour is not the same each time, that means they don't have standarts or knowledge to control it, an
