Electronics Forum | Mon Jul 23 17:49:04 EDT 2007 | davef
We know nothing of DeFelsko, but do understand how they distinguish between the solder mask and the conformal coat. DeFelsko manufactures hand-held, non-destructive coating thickness gages that are ideal for measuring the dry film thickness of confo
Electronics Forum | Fri Dec 01 12:56:33 EST 2017 | emeto
It seems that it will work with 5 mil stencil. To be safe use 4 mil if the rest of the design allows it. 10x20mil apertures for both rows. If you have bigger footprint in the corners, make bigger apertures there. For the ground plane, I would use ver
Electronics Forum | Thu Aug 13 15:46:57 EDT 2020 | ironsmt
I'm having a problem getting sufficient solder reflow on a SMD part. The board design (which can't be changed) is covered in ground planes that cause a lot of uneven heat distribution. I believe heat is wicking away from the culprit part, causing t
Electronics Forum | Wed Dec 19 21:21:02 EST 2012 | davef
MosheSh: When it comes to ground planes, most designers are out over their skis. They don't understand what's going on or how it affects their design. So, they get massively conservative about the number of plane layers, whether they can be hatched o
Electronics Forum | Fri Aug 25 02:15:42 EDT 2000 | SMT Tech
Is it board specific? If so I used a piece of sheet metal between the board and the heaters to correct a similar issues, where a ground plane was absorbing the heat.
Electronics Forum | Mon Dec 18 17:56:26 EST 2000 | Dave F
Does the thermal conductivity of a copper trace on a printed circuit board change as the copper oxidizes? Is the oxide on copper a thermal insulator? If so, should it be considered in an analysis of thermal resitivity between a ground plane and a h
Electronics Forum | Wed Nov 20 09:23:58 EST 2002 | Adam
Is it possible to achieve a 100% top-side solder fillet where pin 1 on the device is attached to a ground plane ? we've optimised the wavesoldering and fluxing operations, but without much success on that pin, every other pin is fine. Any advice woul
Electronics Forum | Tue Aug 05 18:02:05 EDT 2003 | MikeF
Check the areas that are getting solder on the top side. If you have internal ground planes, and the ground plane pth's are not getting solder on top, and signal pth's are, it's a heat problem. If the ground planes are in the middle of the board yo
Electronics Forum | Wed Aug 13 14:24:49 EDT 2003 | jdumont
Does anybody know where I can get a good high temp soldering iron. We recently began making a very thick board with lots of ground planes in it that dissipates the heat applied to the solder very well, making it difficult to rework. Thanks in advanc
Electronics Forum | Tue Jul 27 09:09:06 EDT 2004 | cisridn
Thanks for your input Cal! It is very helpful. The PCB's that I work on also have large ground planes. I was wondering if the Zephytronics could handle it. It is also good to know that they have a money back guarantee.
