▎ 摘　　要

NOVELTY - The utility model claims a composite graphene thermal diffusion sheet, composed of a heat conducting adhesive tape layer, a graphene film layer, a boron nitride film layer, a heat conducting epoxy layer, an alumina fibre layer. The electronic design continuously pushes the device structure to be thinner and lighter configuration development, the requirement of the small device with more complex power requirement must be required to closely monitor the heat management. The utility model claims a composite graphene heat diffusion sheet with high heat conduction and excellent radiation effect, which has enough heat transmission capability, capable of quickly transferring the heat from the heating component, so as to solve the problem that the existing silicon heat diffusion sheet has bad heat conducting performance, low bending strength and so on.