Patent ID: 11859309
Assignee: DS TECHNO CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 0:
1. A chemical-vapor-deposition silicon carbide (SIC) bulk having an improved etching characteristic, comprising:
silicon carbide (SIC) manufactured by a chemical vapor deposition method using MTS (met yltrichlorosilane), hydrogen (H2), and nitrogen (N2) gases,
wherein the SIC manufactured by the chemical vapor deposition method is β-SiC (3C-SiC), 6H-SiC is present in the SIC manufactured by the chemical vapor deposition method, five peaks having a reference code of 03-065-0360 and at least one peak having a reference code of 00-049-1428 are confirmed to be present from XRD analysis of the silicon carbide bulk, and a nitrogen concentration value is 4.0×1018 atoms/cm3 or more at a depth of 1,500 nm or more from a surface of the bulk, which is a metastable layer,
wherein comb patterns are formed in grains of the carbide bulk,
wherein an area ratio of comb patterns in grains of the bulk is 50% or more.