Composite substrate, manufacturing method and LED vertical chip structure based on composite substrate

The invention discloses a composite substrate, a manufacturing method and an LED vertical chip structure based on the composite substrate. The composite substrate structurally comprises a substrate and graphene from bottom to top sequentially, wherein the substrate is a common substrate , such as CuW, SiC, Si, Mo and the like in an LED vertical chip. The composite substrate can be used as a bonding substrate in the manufacturing of the LED vertical chip and can bond the LED chip on a graphene layer. An LED adopting the composite substrate has better heat dissipation performance compared with that adopting the common use substrates of CuW, SiC and Si. Besides, the LED chip is bonded on the graphene layer of the composite substrate to form the LED vertical chip structure, so that the heat dissipation performance of the LED vertical chip structure can be improved effectively.