Security Element and Method for the Production Thereof
AssigneeGiesecke & Devrient GmbH
InventorManfred Heim
Life of this patent
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Abstract
The invention relates to a security element (22) for securing items of value, with a relief structure (22) on which a thin film element (24) having a color shift effect is superposed in an overlap zone, wherein the thin film element (24) includes an absorber layer (30) with gaps (32), in the zone of which a color shift effect is not visible, and with a semitransparent ink layer (34), which is superposed on the thin film element (24) and the relief structure (22) in the area of the gaps (32) in the absorber layer (30), wherein the color impression of the thin film element (24) is coordinated with at least a partial zone of the semitransparent ink layer (34) when viewed under predefined viewing conditions.
Claims27
A security element for securing items of value, having
- a relief structure on which a thin film element having a color shift effect is disposed in an overlap area, wherein the thin film element comprises an absorber layer with gaps, in the area of which no color shift effect is perceptible, and
- a semitransparent ink layer, which is disposed on top of the thin film element and the relief structure in the area of the gaps in the absorber layer, wherein the color impression of the thin film element is coordinated with at least one subzone of the semitransparent ink layer when viewed under predefined viewing conditions, such that the color impressions appear very similar when viewed in a certain viewing direction,
- wherein the semitransparent ink layer has a light transmissivity between 30% and 95% in a spectral range in which the color impression of the thin film element is coordinated with the color impression of the semitransparent layer, and
- the thin film element contains either a reflection layer, an absorber layer and a dielectric spacer layer arranged between the reflection layer and the absorber layer, or at least a first absorber layer, a second absorber layer, and a dielectric spacer layer arranged between the two absorber layers.
Dependencies are inferred from the claim text.