Marcel Duchamp wrote:
> Note that 63/37 eutectic solder resistance = 11.5 times copper
> resistance.  It's hard to see how thick additions of solder would
> boost the power handling capacity.

Actually it's not hard at all.  The basic "1 ounce" copper thickness is 1.4
mil.  There could easily be 40 mils (1mm) of solder on top of the copper,
for more than 50x peak thickness.  Even if the average solder thickness is
only 32 mil (820um), that's still 1/3 the trace resistance according to your
figures.


********************************************************************
Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products
(978) 742-9014.  Gold level PIC consultants since 2000.
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist