Electronics Forum | Wed Jan 16 15:22:29 EST 2002 | Terry Burnette
In his book titled "Manufacturing Techniques for Surface Mount Assemblies" author R.J. Klein Wassink describes the relationship between solder land dimensions, component lead coplanarity, board warpage, solder volumes, and solder paste flux wetting b
Electronics Forum | Mon Nov 15 12:13:41 EST 1999 | Dave F
Steve: There are guidelines for determining if your aperture has the correct proportions to the foil thickness. Maybe that�s what you�re looking for: 1 Aspect ratio = aperture width/foil thickness Chemically etched SB GT 1.5 Laser cut SB GT 1.2
Electronics Forum | Tue May 14 13:18:33 EDT 2002 | Scott B
I think what David was getting at was, as an example. Take a cubic inch of gold. Surface area = 6 sq/in. Volume = 1 cu/in. Water displacement = X. Mass = Y Roll that cube of gold out to a micron thick. Surface area = football pitch. Volume = 1 cu/i
Electronics Forum | Tue May 14 13:48:17 EDT 2002 | Hussman69
You guys must be managers!
Electronics Forum | Wed May 15 10:32:23 EDT 2002 | dougt
DaveF to the rescue, my favorate SMT search engine.
Electronics Forum | Tue May 28 20:56:08 EDT 2002 | ianchan
Great story! *grinz* how do engineering managers get portray?
Electronics Forum | Fri May 17 03:04:15 EDT 2002 | Mike Konrad
This conversation reminds me of the old �How Many Engineers Does It Take To�� joke. We manufacturer the ionic contamination (ROSE, SEC) testers and I am not aware of anyone that performs such exacting surface area calculations. Most people use th
Electronics Forum | Fri May 17 14:46:29 EDT 2002 | Claude_Couture
in both samples the water displacement is 1 cubic inch of water since the volume is the same. the first has a thickness of 1 inch, the second has a thickness of a few microns. if you know the volume and one of the lengh, width or thickness, you can c
Electronics Forum | Tue May 14 08:04:58 EDT 2002 | robbied
Hi. Does anyone out there know of a way to calculate the surface area of populated PCB's? We build many different types, and until now have been using a water displacement method, which I believe to be fundamentally flawed. Our technique is to drop a
Electronics Forum | Tue May 14 13:19:23 EDT 2002 | stefwitt
Claude is right, however, this may work: Dip the empty board in paint and let the access paint drip off. Measure the volume of the paint before and after. Dip a populated board and measure how much more paint was required in percent. Measure the surf
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