Electronics Forum | Mon Feb 02 16:49:05 EST 2009 | davef
Questions are: * What are the soldermasks used by your three board suppliers? * What tests have you run to assess the compatibility between these three soldermasks and your flux?
Electronics Forum | Fri Apr 16 12:17:51 EDT 2010 | richardli
We have asked the supplier use whiter soldermask taking more heat. We also asked the board supplier to double coat board with soldermask. All these tries failed. We are wondering if the stains are flux contamination.
Electronics Forum | Thu Mar 29 15:50:35 EST 2001 | tomgervascio
We've think that with seen solder shorts under BGAs after wave soldering the boards. In addition, it seems to be related to a certain soldermask configuration over the topside BGA vias.. THere is one vendor,A, that is applying soldermask after HASL,
Electronics Forum | Thu Jul 14 19:12:40 EDT 2005 | sync40
Hi. In the past years I had made dozens of PCBs but now I am trying to get a professional finishing on them. The main problem is oxidation of the copper traces. Basically I use the silkscreen method to make the pattern in both layers and then etch. L
Electronics Forum | Wed Sep 19 16:38:07 EDT 2007 | jseagle
Of course there are differences, different equipment, software, tools, etc... We just got a set of questions from a PCB house asking about soldermask clearance between 16 mil pitch pads. Our current manufacturer can put down 3 mils of soldermask.
Electronics Forum | Tue Dec 30 11:29:13 EST 2008 | davef
People use green soldermask because people use green soldermask. In the 1950s, the US military selected green, because they liked green better than other colors. So, here we are. We believe the performance of red and blue is comparable with green. T
Electronics Forum | Fri Jan 09 09:43:48 EST 2009 | boardhouse
Hi Simon, The main reason that it would probably be removed would be do to lack of clearance for a soldermask dam from pad to pad. typically if the clearance from pad to pad is under .008 the solder mask dam would be removed. Min recomended dam siz
Electronics Forum | Fri Oct 15 10:35:44 EDT 2004 | russ
sounds like you have a very thin layer of mask on some pads to me. Russ
Electronics Forum | Mon Aug 22 20:02:06 EDT 2005 | chad
SolderMask, Inc. in Huntington Beach. Ask for Frank Kurisu. Ph: 714-842-1987
Electronics Forum | Tue Nov 28 17:23:03 EST 2006 | flipit
Flash gold usually refers to electrolytic gold with a short plating time. In other words gold plating that requires current to plate. If you have bare copper under your soldermask, the gold is probably ENIG. The only other way to have bare copper
