In the case where through holes in the PC board are not possible. Similar products are available for outer CPU interfaces. The thermal joint is a critical component of the system thermal budget.
Thermal resistance varies greatly among the different types of joints.
There are many factors that influence the D T, in a heat pipe, the wick structure, the properties of the working fluid, and the operating temperature of the heat pipe. To dissipate the absorbed thermal energy in the heat pipe, the condenser end of the pipe must be linked to a suitable heat sink. This is accomplished by rejection of the heat into the air, either by natural or forced convection, or by sinking the output to an enclosure structural component. The more common working fluids for heat pipe designs used for ambient temperature ranges are water, ammonia, acetone and methanol. NPI uses all of these and more, having developed over 37 fluid combinations for specific applications.