Patent ID: 7907339

Claim:
A security element in the form of a multi-layer film body with a replication lacquer layer, wherein, in a plane defined by co-ordinate axes x and y, a first relief structure is shaped into the replication lacquer layer in a first region of the security element and a metal layer of constant surface density with respect to the plane defined by the co-ordinate axes x and y is applied to the replication lacquer layer in the first region of the security element and in an adjacent second region of the security element, and wherein the first relief structure is a diffractive structure with a depth-to-width ratio of the individual structure elements of >0.5 and wherein the metal layer provided on the second region has a nominal layer thickness t o , and wherein the first relief structure has areas with the metal layer having a layer thickness less than the nominal layer thickness t o such that at least one of the areas with the metal layer having a layer thickness less than the nominal layer thickness t o forms a transparent area in the first region, wherein the transparency of the metal layer is increased by the first relief structure in the first region with respect to the transparency of the metal layer in the second region.