Conduction cooled leaded package printed circuit board
This is a model of a PCB conduction frame. 

The blue area is on thickness and the green is a thicker area for high dissipation components.  Holes in the frame allow the components to straddle the frame and be bonded to it. 

The model was built very quickly by creating a uniform mesh in one operation then deleting elements where the frame is cut away.

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Thermal model of the PCB conduction frame.
Temperatures of the frame.
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