초록 ▼

A method for depositing a thin film of diamond on the surface of a Fe-based substrate comprises the step of pre-treating the surface of the Fe-based substrate prior to the deposition consisting of nucleating carbon atoms on the Fe-based substrate to grow the thin film of diamond. The pre-treatment c

A method for depositing a thin film of diamond on the surface of a Fe-based substrate comprises the step of pre-treating the surface of the Fe-based substrate prior to the deposition consisting of nucleating carbon atoms on the Fe-based substrate to grow the thin film of diamond. The pre-treatment consists of supersaturating the surface of the Fe-based substrate with carbon atoms and heating it to form a diffusion barrier layer. During the pre-treatment, at least a portion of the carbon atoms are diffused into the Fe-based substrate. During the deposition process, carbon atoms are prevented by the diffusion barrier layer previously formed to diffuse into the Fe-based substrate whereby these carbon atoms remain available for the nucleation and growth of the thin film of diamond. A portion of the carbon atoms diffused into the Fe-based substrate during the pre-treatment are nucleated during the deposition process and act as anchors to provide a high adhesion between the thin film of diamond and the surface of the Fe-based substrate.

대표청구항 ▼

[ What is claimed is:] [1.] A method for depositing a thin film of diamond on a surface of a Fe-based substrate, comprising the steps of:pre-treating the surface of the Fe-based substrate to produce a concentration of carbon atoms and thereby form a diffusion barrier layer, said pre-treating step co

[ What is claimed is:] [1.] A method for depositing a thin film of diamond on a surface of a Fe-based substrate, comprising the steps of:pre-treating the surface of the Fe-based substrate to produce a concentration of carbon atoms and thereby form a diffusion barrier layer, said pre-treating step comprising the following steps:a) heating the surface of the Fe-based substrate;b) exposing the heated surface of the Fe-based substrate to a carbon atom donor substance to produce the concentration of carbon atoms and thereby form the diffusion barrier, said step (b)producing a black carbon deposit on the surface of the Fe-based substrate; and,c) removing the black carbon deposit from the surface of the Fe-based substrate; anddepositing the thin film of diamond on the pre-treated surface, said depositing step comprising nucleating carbon atoms on the Fe-based substrate to grow the thin film of diamond;wherein the diffusion barrier layer prevents the carbon atoms participating in the deposition process to diffuse into the Fe-based substrate whereby said carbon atoms remain available for nucleation and growth of the thin film of diamond.