Patent ID: 8007909
Filing Date: 2011-08-30
Classification: B24D,C03C,C23C,G02B,Y10T

Abstract:
1. A carbon film, which has an approximate spectrum curve obtainable by superimposing, on a peak fitting curve A at a Bragg's angle (2θ±0.3°) of 43.9°, a peak fitting curve B at 41.7° and a base line in an X-ray diffraction spectrum by CuKa 1 ray, said fitting curve B having an intensity of from 5 to 90% relative to an intensity of the fitting curve A, said carbon film having a film thickness of from 2 nm to 100 μm, said carbon film having a Raman shift having a peak at 1333 cm said peak having a half-value width of from 10 to 40 cm wherein the fitting curve A is a curve of a Pearson VII function, the fitting curve B is a curve of an asymmetric normal distribution function, and the base line is represented by a primary function, wherein said carbon film comprises a structure in which a cubic diamond and a hexagonal diamond are mixed and a defect remains at a high concentration in a portion removed by etching, and a peak is observed at 2θ of 43.9°±0.3° in the X-ray diffraction spectrum in the cubic diamond and a peak is observed at 2θ of 41.7°±0.3° in the X-ray diffraction spectrum in the defect, wherein the crystal defect comprises hexagonal diamond and a point defect including atomic vacancy, a linear defect including relocation or a defect on the basis of a surface unit including a lamination defect, and wherein the defect is formed in a portion formed by removing a graphite or amorphous carbonaceous substance deposited in the course of the film formation by etching.