Security element and security document with one such security element
AssigneeGiesecke & Devrient GmbH
InventorManfred Heim
Life of this patent
Estimating the term…
Abstract
A security element 2, 4 for embedding in or application to a security document in such a way that it is visually recognizable from both sides of the security document 1, is structured in a multilayer fashion and includes two interference elements I1, I2 with color shift effect, a metallic reflection layer R located in between as well as, optionally, diffraction structures 8. Depending on the disposition of the layers I1, R, I2 and the optionally present diffraction structures 8 on a transparent substrate S the color shift effect and/or the diffractive effects are perceptible from one or from both sides of the security element 2, 4. The security element is particularly suitable as a two-sided window thread 4 and as a label or transfer element 2 above a hole 3 in the security document 1.
Claims30
Security document, or semifinished product for the production of the security document, comprising:
- a first and a second surface located opposite to each other;
- and
- a security element, connected to the document or semifinished product such that the security element is respectively recognizable when the first and second surfaces are viewed,
- wherein the security element has a substrate, a reflection layer and, on each side of the reflection layer, a respective interference element with a color shift effect, and
- wherein only the reflection layer has gaps in the form of patterns, symbols or codings, whereas these gaps are covered on each side by the respective interference element wherein both of the interference elements have at least one absorber layer and at least one dielectric layer, which is located between the metal layer and the absorber layer.
Security element for embedding in or application to a security document, characterized in that the security element has a substrate with at least one reflection layer and, on each side of the reflection layer, a respective interference element with color shift effect, wherein only the reflection layer has gaps in the form of patterns, symbols or codings, whereas said gaps are covered on each side by the respective interference element wherein both of the interference elements have at least one absorber layer and at least one dielectric layer, which is located between the metal layer and the absorber layer.
Transfer material for the application of a security element to a document of value, characterized in that the transfer material comprises the following layer structure:
- a carrier layer,
- a reflection layer, and, on each side of the reflection layer, a respective interference element with color shift effect, wherein only the reflection layer has gaps in the form of patterns, symbols or codings, whereas said gaps are covered on each side by the respective interference element wherein both of the interference elements have at least one absorber layer and at least one dielectric layer, which is located between the metal layer and the absorber layer.
Method for producing a transfer element for the application of a security document to a document of value, comprising:
- a) providing a carrier layer;
- and
- b) vapor depositing a reflection layer and, on each side of the reflection layer, a respective interference element with color shift effect, wherein only the reflection layer has gaps in the form of patterns, symbols or codings, whereas said gaps are covered on each side by the respective interference element wherein both of the interference elements have at least one absorber layer and at least one dielectric layer, which is located between the metal layer and the absorber layer.
Dependencies are inferred from the claim text.