EEVblog Electronics Community Forum
Products => Other Equipment & Products => Topic started by: alexig on July 20, 2011, 12:04:23 pm
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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.
(http://img16.imageshack.us/img16/5854/img2107is.th.jpg) (http://img16.imageshack.us/img16/5854/img2107is.jpg)
(http://img41.imageshack.us/img41/9003/img2108gh.th.jpg) (http://img41.imageshack.us/img41/9003/img2108gh.jpg)
Alex.
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Could be a ceramic (sintered) material..
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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.
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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.
http://www.electronics-cooling.com/2010/11/micro-porous-ceramic-heat-sinks-enhance-heat-dissipation/ (http://www.electronics-cooling.com/2010/11/micro-porous-ceramic-heat-sinks-enhance-heat-dissipation/)
http://www.ceramtec.com/index/products/ceramcool/ceramic-heat-sinks/ (http://www.ceramtec.com/index/products/ceramcool/ceramic-heat-sinks/)
I've seen them in some LED bulbs, but thought at first they were insulators.
(http://www.ceramtec.com/img/content/1104_01.jpg)
Could be a ceramic (sintered) material..
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Interesting. Good links, thanks.
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I remember ceramic packaged ICs, like Intel's 8088 or something similar... Even older than me!
However, I think some PC processors have been packaged in ceramics until quite recent days.
You could recognize them from the "metallic" sound (with respect to plastics) and roughness of the surface.
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Yes, I remember many of those, I always thought it was some sort of metal alloy that felt like ceramic.
I remember ceramic packaged ICs, like Intel's 8088 or something similar... Even older than me!
However, I think some PC processors have been packaged in ceramics until quite recent days.
You could recognize them from the "metallic" sound (with respect to plastics) and roughness of the surface.