The thermal conductivity in the usual sense is the power per m2 of cross-section, per m of path length, per K of temperature difference. The unit is W/m/k. The value shown at 9:18 is in W/m2/k because the path length has been ignore. The value 84MW/m2/K is very large only because the path length is very small. The gate thickness is in the order of 1E-8m. To get the true thermal conductivity, the 84MW/m2/K is to be multiplied by 1E-8m. The result is 0.84W/m/K. This is a very low thermal conductivity. For comparison, the conductivity of copper is 400W/m/K.
To: @rangeo1492 Without the SAM layer, even if graphene is attached, heat cannot be dissipated! A heat sink needs thermal paste to work.
@laiafbin44956 ай бұрын
I'm curious about why do we need to switching the heat conduction rate between high/low if it can continuously operate at a high conduction rate? Thank you in advanced.