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cm2⋅∘C/W\text{cm}^{2}{\cdot}^{\circ}\text{C/W}

square centimeter Celsius per watt

Areal thermal resistanceexact by definition

The square centimeter Celsius per watt is 10⁻⁴ m²·K/W. It is the thermal-interface-material unit: thermal grease is quoted around 0.05 to 0.5 °C·cm²/W, and a pad two or three times that. The area normalisation is what lets one number describe a material that will be used under dies of any size.

Watch out: A TIM figure is only meaningful with its bond line thickness and its clamping pressure. The same grease measured at 25 µm and 100 µm gives numbers that differ by a factor of four, and vendors are not always eager to print the test conditions.

1 cm2⋅∘C/W\text{cm}^{2}{\cdot}^{\circ}\text{C/W} 0.0001 RSI (m2⋅K/W)\text{RSI (m}^{2}{\cdot}\text{K/W)}

One square centimeter celsius per watt in every areal thermal resistance unit

100square millimeter kelvin per watt (mm²·K/W)
1square centimeter Celsius per watt (cm²·°C/W)this unit
0.081767square inch hour Fahrenheit per BTU (in²·h·°F/BTU)
0.001tog (tog)
0.000645161clo (clo)
0.000567826hour square foot Fahrenheit per BTU (R (h·ft²·°F/BTU))
0.000116222square meter hour Celsius per kilocalorie (m²·h·°C/kcal)
0.0001square meter kelvin per watt (RSI (m²·K/W))
0.0001square meter Celsius per watt (m²·°C/W)
Solvers that use areal thermal resistance

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