Patent ID: 11881394
Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 0:
1. A stack comprising:
a base portion consisting of silicon carbide and having a first surface that is a Si face; and
a carbon atom thin film disposed on the first surface and including a first main surface facing the first surface and a second main surface that is a main surface on an opposite side from the first main surface, the carbon atom thin film consisting of carbon atoms,
wherein the carbon atom thin film includes at least one of a buffer layer that is a carbon atom layer including carbon atoms bonded to silicon atoms forming the Si face and a graphene layer,
the second main surface includes
a plurality of terraces parallel to the Si face of the silicon carbide forming the base portion, and
a plurality of steps connecting together the plurality of terraces,

the terraces have a width of 5 μm or more and 500 μm or less, and
the steps have a height of 10 nm or more and 500 nm or less.