Patent ID: 8501276

Claim:
A method for producing a laminate comprising a substrate and a carbon film comprising an aggregate of a carbon particle, the method comprising: preparing the substrate; depositing a fine diamond particle on the substrate; and depositing the carbon film comprising the aggregate of a carbon particle having a grain size of 1 to 100 nm on the fine diamond particle deposited on the substrate by using a gas mixture comprising hydrogen, 0.5 to 10 mol % of a carbon-containing gas, and 0.5 to 10 mol % of CO or CO 2 at a temperature of 50 to 300° C. and a pressure of 5×10 1 to 5×10 2 Pa, wherein the carbon film is produced by using a surface wave plasma CVD apparatus, wherein a quartz member is used as a window in said CVD apparatus for microwave transmission, wherein the carbon film 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 CuK α1 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 −1 ±10 cm −1 in a Raman Scattering spectrum, said peak having a half-value width of from 10 to 40 cm −1 in the Raman Scattering spectrum, and wherein the laminate comprises: a cubic diamond in which a peak is observed at 2θ of 43.9°±0.3° in the X-ray diffraction spectrum; and a defect in which a peak is observed at 2θ of 41.7°±0.3° in the X-ray diffraction spectrum, wherein the defect comprises a hexagonal diamond and a lamination defect.