Decorative member and method for preparing same
The present disclosure relates to a decoration element comprising a light reflective layer; and a light absorbing layer provided on the light reflective layer, wherein the light reflective layer has surface resistance of 20 ohm/square or greater.
1. A decoration element comprising:
a light reflective layer; and
a light absorbing layer provided on the light reflective layer,
wherein the light reflective layer has a surface resistance of 20 ohm/square or greater,
wherein an upper surface of the light absorbing layer comprises:
a pattern having cone-shaped protrusions or grooves, optionally, having a cut on an upper surface of the cone-shaped protrusions or grooves, or
a pattern having protrusions or grooves in which a highest point of a protrusion has a line shape or a lowest point in a groove has a line shape, and
wherein, in the pattern having cone-shaped protrusions, two or less of the cone-shaped protrusions have a same shape when the upper surface of the cone-shaped protrusions or grooves is observed while rotating the cone-shaped pattern 360 degrees around a vertex of the cone-shaped protrusion.
2. The decoration element of claim 1 , wherein the surface resistance of the light reflective layer is 1 giga-ohm/square or greater.
3. The decoration element of claim 1 , wherein a material of the light reflective layer has a specific resistance of 2×10-4 ohm*cm or greater.
4. The decoration element of claim 1 , wherein the light reflective layer is a single layer or a multilayer comprising one, two or more types of materials selected from among indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nd), iron (Fe), chromium (Cr), cobalt (Co), gold (Au) and silver (Ag), or oxides, nitrides or oxynitrides thereof, and one, two or more types of materials among carbon and carbon composites.
5. The decoration element of claim 1 , wherein a color film is provided:
on a surface of the light absorbing layer, such that the light absorbing layer is between the color film and the light reflective layer; or
between the light reflective layer and the light absorbing layer; or
on a surface of the light reflective layer, such that the light reflective layer is between the color film and the light absorbing layer.
6. The decoration element of claim 5 , further comprising a substrate provided on the light absorbing layer, such that:
the color film is provided between the light absorbing layer and the substrate, or
the substrate is provided between the color film and the light absorbing layer, or the light absorbing layer is between the color film and the substrate, or
the reflective layer and light absorbing layer are provided between the color film and the substrate.
7. The decoration element of claim 1 , wherein the light absorbing layer comprises at least two points with different thicknesses.
8. The decoration element of claim 1 , wherein the light absorbing layer comprises at least one region in which an upper surface is an inclined surface, which is inclined at an angle of greater than 0 degrees and less than or equal to 90 degrees, and wherein the light absorbing layer comprises one or more regions having a thickness different from a thickness in any one region having the inclined surface.
9. The decoration element of claim 1 , wherein the light absorbing layer has dichroism of ΔE*ab>1.
10. The decoration element of claim 1 , wherein, in the pattern, having protrusions or grooves in which the highest point of a protrusion has a line shape or the lowest point of a groove has a line shape, has only one shape when the upper surface of the pattern is observed while rotating the pattern 360 degrees around a center of gravity of the upper surface.
11. The decoration element of claim 1 , wherein the light absorbing layer has a refractive index of 0 to 8 at 400 nm.
12. The decoration element of claim 1 , wherein the light absorbing layer has an extinction coefficient of greater than 0 and less than or equal to 4 at 400 nm.
13. The decoration element of claim 1 , wherein the light absorbing layer is a single layer or a multilayer comprising one, two or more types of materials selected from among indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nd), iron (Fe), chromium (Cr), cobalt (Co), gold (Au) and silver (Ag), or oxides, nitrides or oxynitrides thereof.
14. The decoration element of claim 1 , which is a deco film or a case of a mobile device.