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Stone as a heatsink?

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Hi all,

I just pulled a product apart and found that one chip had a stone based material (or something similar) on it as a heatsink ???.

This is the first time I've seen this, is it common and/or just a way to cut costs? This board also had a proper heatsink on a larger chip.


Could be a ceramic (sintered) material..

It could impulse heat sink needs and using the thermal mass of the ceramic as a buffer.  I'm not familiar with the heat transfer characteristics of ceramics vs more normal heat sink materials. 

Nice, first time I've seen that on a real product.  Read about them, since they are porous and thermally conductive they have more exposed surface area than aluminum.

I've seen them in some LED bulbs, but thought at first they were insulators.

--- Quote from: scrat on July 20, 2011, 12:39:48 pm ---Could be a ceramic (sintered) material..

--- End quote ---

Interesting.  Good links, thanks.


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