It consists of a tacky, electrically non conductive phase change film on one side of a conformable metal foil carrier. H766 can be assembled onto a heat sink or heat spreader, leaving the metal foil exposed. The natural tack of the phase change polymer holds the H766 to the heat sink while the foil layer acts as a highly conductive interface between the component and heat sink and allows a clean break during dis assembly. The foil also eliminates the need for a protective liner, which simplifies the final assembly process.