Patent ID: 11858813
Assignee: GENERAL GRAPHENE CORP.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 12:
13. A method for forming graphene, said method comprising:
disposing, on a laterally extending substrate holder, a laterally extending substrate sheet having located thereon a first surface for processing and a second surface for processing, wherein said second surface for processing is located a positive lateral distance from said first surface for processing;
scavenging, in presence of a substrate gas scavenging composition at a scavenging flow rate in one or more infeed tunnels disposed adjacent to said substrate holder, a substrate gas present in and around said first surface for processing to produce a substrate gas depleted surface;
annealing, in presence of an annealing gas composition at an annealing flow rate and at an annealing temperature in one or more processing sub-enclosures disposed laterally adjacent to one or more said infeed tunnels, said second surface for processing to produce an annealed surface, wherein said annealing temperature is produced using one or more heat sources being disposed adjacent to said second surface for processing, and
wherein the scavenging flow rate is greater than the annealing flow rate such that a pressure drop is created adjacent an entrance of the one or more processing sub-enclosures, and
wherein some of said heat, resulting from said annealing temperature and said annealing gas composition, flows from said one or more processing sub-enclosures towards said first surface for processing and facilitates production of said substrate gas depleted surface in said one or more infeed tunnels.