JP2002282024A - Personal ornament made of precious metal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a personal ornament made of a precious metal which is convenient and has mass-productivity and on the surface of which a black- type color is applied in a striped pattern and which is modern and rich in decorative properties. SOLUTION: The personal ornament made of the precious metal forms a hard carbon film on the surface of an ornament main body made of gold or a gold alloy in such a way that the outer periphery of the hard carbon film becomes to a notched striped pattern is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jewelry made of precious metal, which is rich in decorativeness and whose surface is colored black in stripes.

[0002]

2. Description of the Related Art Various designs of precious metal jewelry have been commercialized, but in recent years, colorful jewelry has been desired along with diversification of needs. Conventional methods for obtaining various colors on the surface of gold and other precious metal accessories include the following: (1) Parts made of gold or other precious metal and having different colors are individually formed. Later, they are assembled. (2) After forming a predetermined accessory using gold or other noble metal, a mask material is formed in a pattern using a mask method,
Then, a colored film is coated thereon, and then the mask material is peeled off and removed to obtain a colored accessory. (3) After forming a predetermined accessory with gold or other noble metal, a mask material is formed in a pattern using a mask method,
A chemical treatment such as an acid treatment is performed thereon, and then the mask material is peeled off and removed to obtain a colored accessory. Are roughly divided into

[0003]

However, each of the above means has the following disadvantages.
That is, in the method (1), since two or more parts are individually processed, there is a limit to the reduction in the size of the parts. However, it must be created from each part, and it takes time to assemble. In the method (2), the mask material used in the mask method has problems in heat resistance, releasability, pattern transferability, and the like. there were. The method (3) involves a chemical treatment such as an acid treatment, which requires large-scale and expensive equipment, and has a problem that it is difficult to obtain an essential black accessory.

SUMMARY OF THE INVENTION An object of the present invention is to provide a modern and highly decorative jewelry made of precious metal, which has a simple and mass-producible color, and has a blackish color striped on its surface.

[0005]

According to the present invention, there is provided a jewelry made of precious metal, in which a hard carbon film is formed on the surface of a jewelry body made of gold or gold alloy so that the outer periphery has a jagged striped pattern. It is a feature.

In the jewelry made of precious metal of the present invention, a hard carbon film is formed on the surface of a jewelry body made of gold or a gold alloy through an intermediate layer made of silicon or germanium so that the outer periphery has a jagged striped pattern. It is also characterized by being formed.

Here, the hard carbon film used as a black stripe pattern has a large film stress by itself, so that it is impossible to directly form a film having a thickness of 0.5 μm or more on a component. For this reason, adhesion is assured by forming silicon or germanium having excellent adhesion between the hard carbon film and the precious metal accessory body serving as the base as the intermediate layer. Silicon or germanium used here can be formed by a PVD method, a CVD method, or the like.

[0008] The jewelry made of precious metal obtained by the present invention comprises:
The outer periphery has a jagged striped pattern, which is similar to a pattern made by animal hair called an animal pattern. Therefore, as an unprecedented variety of expression methods, it brings a new style to the pattern on the surface of precious metal accessories.

In addition, the striped pattern with a knurled outer periphery also has the effect of fixing the hard carbon film very firmly to the surface of the accessory body made of gold or a gold alloy.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a noble metal accessory according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an embodiment in which the jewelry of the present invention is applied to a ring, and FIG. 2 is a sectional view thereof.

In FIGS. 1 and 2, reference numeral 1 denotes a ring body made of gold or a gold alloy. In FIG. 1 and FIG. 2, a ring having a wide upper surface and a slightly thinner portion on the back side of the finger is provided so that the pattern on the surface can be emphasized. Is shown. A hard carbon film 2 is formed on the surface of the ring main body 1 via an intermediate layer 3 made of silicon or germanium so that the outer periphery has a jagged striped pattern.

Here, the hard carbon film 2 used as a black stripe pattern has a large film stress by itself, so that a hard film having a desired thickness with good color can be formed directly on the component. Therefore, the adhesion between the hard carbon film and the precious metal accessory body serving as a base is formed by forming the intermediate layer 3 of silicon or germanium having excellent adhesion. The thickness of the intermediate layer 3 is 0.1 μm, and the thickness of the hard carbon film 2 is 1 μm.
About m is preferable.

The hard carbon film 2 has a jagged outer periphery, which is similar to the animal hair pattern called an animal pattern. It brings a new breeze to the surface pattern. Of course, at the boundary between the hard carbon film 2 and the ring main body 1 inside the striped pattern, a step having a predetermined uneven pattern can be formed, and this step can give the obtained ring a three-dimensional effect. it can. The formation of such a striped pattern with a jagged outer periphery is performed as follows. That is, first, a pattern is formed on the surface of the ring main body by using a resist material used in a normal photolithography process. The pattern processing of the surface of the ring main body 1 can be performed by a dry etching method, a lift-off method, or the like.

Thereafter, an intermediate layer 3 such as a silicon film is formed by means such as sputtering. As a method for forming the silicon film, another PVD method or a plasma CVD method is also possible. Next, the hard carbon film 2 is formed by the plasma CVD method.

The thus-obtained striped pattern with a knurled outer periphery has the additional effect of fixing the hard carbon film 2 very firmly to the surface of the ring body 1 made of gold or a gold alloy. It also has. In the above embodiment, a ring is described as an example of a jewelry made of precious metal, but it goes without saying that the jewelry can be applied to brooches, ties, pendant tops and other accessories.

[0016]

[Example] Hard carbon film forming conditions Source gas: CH4, excitation method: high frequency (13.56 MHz), high frequency power: 500 W, gas pressure: 0.1 torr, deposition rate: 0.2, μm / min, processing time: 5 minutes, processing Temperature: about 150 ° C, Film hardness: Vickers hardness, 5.000 kg / mm2, The hard carbon film obtained under the above conditions was analyzed by X-ray diffraction and RHEED analysis.
The film had an amorphous structure, and the result of FT-IR spectrum showed that the film contained a small amount of hydrogen. Note that the same effect as described above can be obtained when germanium is used as the intermediate layer.

[0017]

The jewelry made of precious metal obtained by the present invention has a jagged striped outer periphery, which is similar to the animal hair pattern called an animal pattern. Therefore, as an unprecedented variety of expression methods, it brings a new style to the pattern on the surface of precious metal accessories.

Further, the striped pattern having a jagged outer periphery also has an effect that the hard carbon film is very firmly fixed to the surface of the accessory body made of gold or gold alloy.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment when a jewelry made of precious metal of the present invention is applied to a ring.

FIG. 2 is a sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ring main body 2 Hard carbon film 3 Intermediate layer

Claims (2)

[Claims] 1. A noble metal accessory, wherein a hard carbon film is formed on the surface of a gold or gold alloy accessory body so as to form a jagged striped outer periphery. 2. A hard carbon film is formed on the surface of a gold or gold alloy accessory body through an intermediate layer made of silicon or germanium so that the outer periphery has a jagged striped pattern. Precious metal jewelry.