The purpose of using thermal grease and thermal pads in electronic
products is to cool down and dissipate the heat generated by electronic
products during the working process, and maintain the normal working
temperature of electronic products. So in the end is thermal grease good
performance? Or is the performance of thermal pads better? The following
aspects are analyzed and explained for your reference.
1. Operational aspects
Thermal grease belongs to paste or liquid form, and thermal pad belongs to
solid state. Therefore, in terms of shape and operability, thermal pad is
simpler and easier to operate than thermal grease, because thermal grease is in
use during use. It needs to be stirred evenly first, and the smearing should be
as uniform as possible and the thickness should be properly controlled. There
are certain requirements for operators and equipment, and the thermal pad only
needs to choose the appropriate thickness and directly fit it.
2. In terms of stability
In terms of stability in use, thermal grease is superior to thermal pads because thermal pads are damaged during use, do not fit properly, or have
uneven interfaces, which will greatly reduce the thermal stability of
electronic products, not to mention When two planes are in contact, it is
impossible to fit 100%, and there will be some gaps. However, because the
thermal grease is in a liquid state, it fills the plane interface, and then it
is easy to be in complete contact with the heat dissipation interface, so that
the plane gap disappears, so the thermal grease dissipates heat. The
application is relatively stable.
3. Thermal conductivity
Thermal grease and thermal pad have good heat dissipation effect in terms
of thermal conductivity. It is not possible to unilaterally judge the thermal
conductivity of thermal grease and thermal pad. Their thermal conductivity is
based on the requirements of formula technology. The common ones are between
1-5W/m·k, and even more than 5W/m·k, so electronic products choose
heat-dissipating adhesive products, thermally conductive silicone grease and
thermally conductive gaskets, and they need to be combined with their own
products. According to the requirements of structure, personnel operation,
etc., it is necessary to choose whether it is appropriate to use thermal conductive
silicone grease or thermal pad.
