▎ 摘　　要

NOVELTY - Carbon film comprises sandwich structure of base carbon film, metal-carbon amorphous transition layer and metal coating, where the base carbon film is 20-30 μm, the metal-carbon amorphous transition layer thickness is 5-10 nm, and the metal coating thickness is 1-2 μm. USE - High-low temperature resistant and frequent alternating performance stable high heat conducting carbon film for thermal management of high power electric device in military, automobile and aerospace field. ADVANTAGE - The method provides high and low temperature resistant and frequent alternating performance stable high heat conducting carbon film with high heat conductivity, high flexibility, low density of special quality and magnetic control sputtering technique device that is mature, simple operation, easy to obtain raw material large scale production, obtaining the carbon-based heat management material with low temperature impact resistance and stable performance in extreme environment. The method improves the structure damage and performance loss of high heat-conducting carbon film under frequent temperature alternating environment. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the carbon film with stable performance and high thermal conductivity that is resistant to high and low temperature frequent alternation. DESCRIPTION OF DRAWING(S) - The drawing shows schematic view of high and low temperature resistant high heat-conducting carbon film.