▎ 摘　　要

NOVELTY - The plate comprises an alumina ceramic plate. One surface of alumina ceramic plate has a three-dimensional conical structure layer of alumina ceramic. A copper-graphene composite material layer is compounded on the three-dimensional conical structure layer. USE - Used as packaging carrier plate. ADVANTAGE - The plate: constructs copper-graphene composite structure layer; forms a packaging connection layer with higher thermoelectric transport performance; has controllable mechanical parameter, so as to improve performance of device; prolongs service life; is simple in operation, compatible with thermoelectric device manufacturing process; and also has wide application prospect in each type of temperature area thermoelectric device package. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a preparation method of packaging carrier plate. DESCRIPTION OF DRAWING(S) - The drawing shows a structural schematic diagram of the packaging carrier plate structure.