Thermal Resistance：

Thickness / Area (㎡) * Thermal Conductivity (W/mk) = Thermal Resistance. The thinner thickness is, the lower thermal resistance is.

Phase Change：

Phase change means the change of state matter. For example, water change from solid to liquid, liquid to gas, without changing of chemical components. When phase change products reached the phase change temperature, it will change into grease, to fill the slit between surface and surface, exhaust air, reducing the air resistance, to get good thermal effects.

Thermal Conductivity (K value)：

Material’s ability to conduct heat is called thermal conductivity. The definition of thermal conductivity is, material with unit length and cross section can conduct heat directly under unit temperature difference in unit of time. Or means the thermal conductivity when cylinder which has 1㎡ cross-sectional area, the temperature difference of axially 1M is 1 Kelvin（1K = 1℃）. The bigger thermal conductivity is, means the material has faster heat transfer rate to show better thermal conductivity.