ENHANCED THERMAL DIFFUSION SHEETS AND THE USE OF ELECTRONIC DEVICES

摘要

In order to solve the problems of a graphitic sheet using a graphitic heat-diffusion material, the present invention makes it possible to manufacture a heat-diffusion sheet, of which anisotropy of heat conductivity is increased by manufacturing a composite of a ceramic insulation layer and a conductive adhesive layer on a copper thin film layer so as to increase a horizontal heat conductivity with respect to a vertical heat conductivity. In addition, the present invention is intended to solve a rise in a surface temperature of an electronic device by absorbing and dispersing heat generated in the electronic device by using the heat-diffusion material as a heat spreader of the electronic device including a portable communications device. The portable communications devices including the heat-diffusion sheet comprises a polychlorinated binpheneyl (PCB) substrate, a heat source under the PCB substrate, a first heat-diffusion sheet under the heat source, a battery under the first heat diffusion sheet, a second heat diffusion sheet under the battery, and an outer case which surrounds the PCB substrate, the heat source, the first heat-diffusion sheet, the battery, and the second heat-diffusion sheet from the outside.