Coloring forgery prevention structure and coloring forgery prevention medium

Patent metadata

Field	Value
Publication number	US-2016237622-A1
Application number	US-201615141359-A
Country	US
Kind code	A1
Filing date	Apr 28, 2016
Priority date	May 25, 2011
Publication date	Aug 18, 2016
Grant date	—

Abstract

A forgery prevention structure, in one configuration, includes a relief forming layer, a first reflection layer, a functional thin film layer, a second reflection layer and a protection layer in this order. In this configuration, the relief forming layer has a relief structure comprising a first relief and a second relief; each of the reliefs has an uneven surface, a surface area of the uneven surface of the first relief being smaller than a surface area of the uneven surface of the second relief; the first reflection layer and the functional thin film layer each are provided along a whole of the uneven surfaces of the reliefs and each has uneven surfaces corresponding respectively to the uneven surfaces of the reliefs; and the second reflection layer and the protection layer each has an uneven surface corresponding to the uneven surface of the first relief.

First claim

What is claimed is:

1 . A forgery prevention structure comprising:
a relief forming layer, a first reflection layer, a functional thin film layer, a second reflection layer and a protection layer in this order, wherein the relief forming layer has, on one side, a relief structure comprising a first relief and a second relief, each of the first relief and the second relief performing an effect of diffracting, scattering, absorbing, or polarizing/separating a wavelength range of at least a part of visible light, each of the first and second reliefs has an uneven surface, a surface area of the uneven surface of the first relief being smaller than a surface area of the uneven surface of the second relief, the first reflection layer and the functional thin film layer each are provided along a whole of the uneven surfaces of the first and second reliefs and each has uneven surfaces corresponding respectively to the uneven surfaces of the first and second reliefs, and the second reflection layer and the protection layer each cover only a surface of the functional thin film layer of the first relief and each has an uneven surface corresponding to the uneven surface of the first relief.

2 . The forgery prevention structure according to claim 1 , wherein the first reflection layer includes at least one selected from a group of tantalum oxide, niobium oxide, titanium oxide, indium oxide tin, zirconium oxide, cerium oxide, and hafnium oxide.

3 . The forgery prevention structure according to claim 1 , wherein the first reflection layer is formed by a high-luminance transparent reflection painting material, which is made of high refraction particles.

4 . The forgery prevention structure according to claim 1 , wherein an adhesion layer is layered on both of the functional thin film layer of the second relief and the protection layer of the first relief to provide the forgery prevention structure with a sticker configuration.

5 . The forgery prevention structure according to claim 2 , wherein an adhesion layer is layered on both of the functional thin film layer of the second relief and the protection layer of the first relief to provide the forgery prevention structure with a sticker configuration.

6 . The forgery prevention structure according to claim 3 , wherein an adhesion layer is layered on both of the functional thin film layer of the second relief and the protection layer of the first relief to provide the forgery prevention structure with a sticker configuration.

7 . The forgery prevention structure according to claim 1 , wherein
at least a separate substrate is provided, on which at least the relief forming layer, the first reflection layer, the functional thin film of the first and second reliefs, and the second reflection layer and the protection layer of the first relief are layered, and an adhesion layer is layered on both the functional thin film layer of the second relief and the protection layer of the first relief to provide the forgery prevention structure with a transfer foil configuration which can be separated from the substrate.

8 . The forgery prevention structure according to claim 2 , wherein
at least a separate substrate is provided, on which at least the relief forming layer, the first reflection layer, the functional thin film of the first and second reliefs, and the second reflection layer and the protection layer of the first relief are layered, and an adhesion layer is layered on both the functional thin film layer of the second relief and the protection layer of the first relief to provide the forgery prevention structure with a transfer foil configuration which can be separated from the substrate.

9 . The forgery prevention structure according to claim 3 , wherein
at least a separate substrate is provided, on which at least the relief forming layer, the first reflection layer, the functional thin film of the first and second reliefs, and the second reflection layer and the protection layer of the first relief are layered, and an adhesion layer is layered on both the functional thin film layer of the second relief and the protection layer of the first relief to provide the forgery prevention structure with a transfer foil configuration which can be separated from the substrate.

Assignees

• Toppan Printing Co Ltd

Inventors

• Yashiki Kazuhiro

Classifications

• B42D25/328

  Diffraction gratings; Holograms · CPC title

• G03H1/0256

  having specific functional layer · CPC title

• G03H1/0244

  Surface relief holograms (replicating hologram without interference recording G03H1/0276) · CPC title

• B42D25/29

  Securities; Bank notes · CPC title

• B42D25/45

  Associating two or more layers · CPC title