US 7,604,846 B2 · Manufacturing method of colored diamond by ion implantation and heat treatment

Abstract

The present invention relates to a manufacturing method of colored diamond and, more particularly, to a manufacturing method of colored diamond by ion implantation and heat treatment. The manufacturing method comprises a first step of implanting ions to the surface of diamond by accelerating the ions under vacuum, and a second step of heat-treating the implanted diamond. By implanting ions inducing the change in the optical band gap of a diamond, the manufacturing method provides a colored diamond with relatively lower cost compared to a metal ion implantation in the prior art, and a uniform color is obtained by heat treatment. Additionally, the manufacturing method of the present invention provides a diamond having various colors with permanent color development effects, by controlling the condition of ion implantation and heat treatment.

Claims3

Dependent claims

A method for introducing color in a diamond comprising:

providing a diamond having a surface;
introducing color by implanting ions in a first step wherein the ions are selected from the group consisting of boron ions and nitrogen ions wherein the implantation is carried out with an ion density of 1017 ions/cm2 into the surface of the diamond by accelerating the ions under vacuum conditions with an implantation energy in a range of between 50˜100 keV in a single step;
and
heat treating the implanted diamond at a temperature in a range of 500° C.˜650° C. under one of (a) vacuum and (b) an inert gas atmosphere for about 2 hours to produce a colored diamond.

1 more element

Dependencies are inferred from the claim text.

Manufacturing method of colored diamond by ion implantation and heat treatment

Life of this patent

Manufacturing method of colored diamond by ion implantation and heat treatment

Life of this patent

Abstract

Claims3