Carbon film

摘要

Problem To provide a carbon film and a laminate having optical characteristics of retaining high transparency, having high refraction index and less double refractivity, being excellent in electric insulating property, being capable of being coated at good adhesion to various substrates, and being capable of being formed at a low temperature, and applications thereof. Means for Solving the Problem The invention relates to a carbon film which has an approximate spectrum curve obtainable by superimposing, on a peak fitting curve A at a Bragg's angle (2theta±0.3°) of 43.9°, a peak fitting curve B at 41.7° and a base line in an X-ray diffraction spectrum by a CuKa₁ ray, and has a film thickness of from 2 mm to 100 mum. The intensity of the fitting curve B relative to the intensity of the fitting curve A is preferably from 5 to 90% in the approximated spectrum described above. In the carbon film, the Raman shift has a peak at a 1333±10 cm^-1 in the Raman scattering spectrum, and the half-value width of the peak is from 10 to 40 cm^-1. Further, the invention relates to a laminate characterized by disposing, on the substrate, a carbon aggregate film of 2 nm to 100 mum thickness comprising an aggregate of carbon particles having an approximate spectrum curve described above. Moreover, the invention relates to an optical device, optical glass, wrist watch, electronic circuit substrate, or grinding tool having the laminate described above.