▎ 摘　　要

NOVELTY - Composite seed crystal comprises aluminum nitride ceramic substrate, a graphene thin layer on the aluminum nitride ceramic substrate and an aluminum nitride thin film on the graphene thin layer. USE - The composite seed crystal is useful for aluminum nitride single crystal growth. ADVANTAGE - The method: meets the needs of seed crystals of any size. The composite seed crystal: has similar physical properties to aluminum nitride single crystal; does not introduce foreign impurities, and has no problem of lattice mismatch and thermal expansion coefficient mismatch caused by heterogeneous seeds. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the composite seed crystal. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the composite seed crystal (Drawing includes non-English language text).