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 absorbing 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 absorbing layer has a surface resistance of 20 ohm/square or greater,
wherein the light absorbing layer has an asymmetric structure comprising two or more points with different thicknesses,
wherein the light absorbing layer comprises one or more regions in which an upper surface is an inclined surface, wherein the inclined surface is inclined at an angle of greater than 0 degrees and less than or equal to 90 degrees,
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 to achieve a target color difference of the decoration element, and
wherein a difference in thickness of the light absorbing layer ranges from 2 nm to 200 nm.
2. The decoration element of claim 1 , wherein the surface resistance of the light absorbing layer is 1 giga-ohm/square or greater.
3. The decoration element of claim 1 , wherein the light absorbing layer is a single layer or a multilayer comprising one or more materials selected from: indium (In), tin (Sn), silicon (Si), copper (Cu), germanium (Ge), aluminum (Al), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nd), titanium (Ti), iron (Fe), chromium (Cr), cobalt (Co), gold (Au), silver (Ag), and oxides, nitrides or oxynitrides thereof.
4. The decoration element of claim 1 , wherein the light absorbing layer comprises one or more materials selected from: copper oxides, copper nitrides, copper oxynitrides, aluminum oxides, aluminum nitrides, aluminum oxynitrides and molybdenum titanium oxynitrides.
5. The decoration element of claim 1 , wherein the light reflective layer has a surface resistance of 20 ohm/square or greater.
6. The decoration element of claim 1 , wherein the surface resistance of the light reflective layer is 1 giga-ohm/square or greater.
7. 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.
8. The decoration element of claim 1 , which has a surface resistance of 20 ohm/square or greater.
9. The decoration element of claim 1 , which has a surface resistance of 1 giga-ohm/square or greater.
10. The decoration element of claim 1 , further comprising a color film provided:
on 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 the light reflective layer, such that the light reflective layer is between the color film and the light absorbing layer.
11. The decoration element of claim 10 , further comprising a substrate provided:
on the light absorbing layer, such that the light absorbing layer is between the color film and the light reflective layer; or
on the light reflective layer, such that the light reflective layer is between the color film and the light absorbing layer.
12. The decoration element of claim 1 , wherein the light absorbing layer has dichroism of ΔE*ab>1.
13. The decoration element of claim 1 , wherein an upper surface of the light absorbing layer comprises:
a pattern having cone-shaped, protrusions or grooves, wherein, optionally, an upper surface of the cone-shaped protrusions or grooves is cut, or
a pattern having a protrusion in which the highest point has a line shape or a groove in which the lowest point has a line shape.
14. The decoration element of claim 13 , wherein, in the pattern having cone-shaped protrusions or grooves, two or less protrusions or grooves have a same shape when an upper surface of the cone-shape protrusions or grooves are observed while rotating the cone-shaped pattern 360 degrees around the vertex of the cone-shaped protrusions.
15. The decoration element of claim 13 , wherein the pattern having a protrusion in which the highest point has a line shape or a groove in which the lowest point has a line shape, has only one shape when an upper surface of the pattern is observed while rotating the pattern 360 degrees around a center of gravity of the upper surface.
16. The decoration element of claim 1 , wherein the light absorbing layer has a refractive index of 0 to 8 and an extinction coefficient of greater than 0 and less than or equal to 4 at 400 nm.
17. The decoration element of claim 1 , which is a deco film or a case of a mobile device.