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On mouser they have Panasonic Thermally Conductive Graphite Sheets listed. The Panasonic Thermal Interface Products PGS Graphite Sheet 130X180X0.1mm claims to have a thermal conductivity of 700W/m-k, almost twice that of Cu.

The Panasonic Industry datasheet on this product (“PGS” Graphite Sheets) indicates it can have a thermal conductivity of from 700 to 1950 W/(m·K). The sheets are very thin - 0100um is the thickest.

Is this product meant to be the TIM between a heatsink and electronic package?
 

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On mouser they have Panasonic Thermally Conductive Graphite Sheets listed. The Panasonic Thermal Interface Products PGS Graphite Sheet 130X180X0.1mm claims to have a thermal conductivity of 700W/m-k, almost twice that of Cu.

The Panasonic Industry datasheet on this product (“PGS” Graphite Sheets) indicates it can have a thermal conductivity of from 700 to 1950 W/(m·K). The sheets are very thin - 0100um is the thickest.

Is this product meant to be the TIM between a heatsink and electronic package?
If you look at that datasheet: Microsoft PowerPoint - PGS Presentation-Ver10.10E (mouser.com) the thermal conductivity is very good across the flat part (x,y axis) but not so good through the flat part (z axis) where it is more like a thermal pad with 15 W/m K. And it probably won't contact as well as a thermal pad.
So it would work great if you wanted to spread the heat laterally like in a tablet, but not as excellent if you wanted to transfer the heat right through to a typical cooler. If the carbon plates were arranged perpendicular to the die this would work better but would be very tough to make.
I picked up some similar pyrolytic graphite as an "ice knife" and it does transfer heat along the plates very well, and also floats on magnets, but is hard like pencil lead when it gets thicker.
 
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