Articles having diamond-like protective film
AssigneeTDK Corporation
InventorsMasanori Shibahara, Masatoshi Nakayama
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Abstract
A protectively coated article comprises a substrate of a material selected from the group consisting of alloys containing at least Co, Ni, or Fe, ceramics, and glass and which has only a slight affinity for a diamond-like thin film, an intermediate carbon layer formed on the substrate, the intermediate layer having a hardness Hv in the range from 1000 to 5000 kg/mm2, or harder than the substrate but less hard than a diamond-like thin film to be formed thereon, and a diamond-like thin film formed further thereon. The interposition of the intermediate layer permits the diamond-like thin film to be bound securely to a substrate surface which has a slight affinity for the film.
Claims7
A protectively coated article which comprises a substrate of a material selected from the group consisting of alloys containing at least Co, Ni, or Fe, ceramics, and glass and which has only a slight affinity for a diamond-like thin film, an intermediate layer formed on the substrate consisting essentially of carbon, said intermediate layer having a hardness Hv in the range from 1000 to 5000 kg/mm.sup.2, and harder than the substrate but less hard than a diamond-like thin film to be formed thereon and having a thickness of 0.02 to 3.0 .mu.m, and a diamond-like thin film consisting of amorphous carbon having a clear Raman's absorption peak at about 1,550 cm.sup.-1 but not having a sharp peak at 1,333 cm.sup.-1 formed further thereon.
Dependencies are inferred from the claim text.