Method for producing a film element

Patent metadata

Field	Value
Publication number	US-10179472-B2
Application number	US-201615259620-A
Country	US
Kind code	B2
Filing date	Sep 8, 2016
Priority date	Mar 6, 2008
Publication date	Jan 15, 2019
Grant date	Jan 15, 2019

Abstract

The invention concerns a process for producing a film element having mutually registered metallic layers (11, 16) and a film element which can be produced by such a process. A first metallic layer (11) provided on a first surface of a flexible single-layer or multi-layer carrier film (10) and a masking layer (13) provided on the second surface of the carrier film (10), opposite to the first surface, are structured in accurate register relationship with each other by means of mutually synchronized structuring procedures. After structuring of the first metallic layer (11) and the masking layer (13) one or more further layers are applied to the first metallic layer (11). Applied to the one or more further layers (15) is a second metallic layer (16) to which a first photoactivatable layer (17) is applied. The first photoactivatable layer (17) is structured by means of trans-exposure through the masking layer (13), the first metallic layer, the one or more further layers and the second metallic layer (16) from the side of the masking layer (13) by means of electromagnetic radiation of a wavelength to which the first photoactivatable layer (17) is sensitive, or the first photoactivatable layer is exposed controlledly through the masking layer from the side of the film body that is opposite to the masking layer.

First claim

The invention claimed is:

1. A film element comprising:
a flexible single-layer or multi-layer carrier film;
a first metallic layer provided on a first surface of the carrier film;
a masking layer provided on a second surface of the carrier film opposite to the first surface;
a second metallic layer arranged on the side of the first surface; and
one or more further layers arranged between the first and second metallic layers,
wherein the masking layer comprises a pattern of regions including regions in which material of the masking layer is present and regions in which material of the masking layer is not present, and
wherein the first metallic layer and the second metallic layer respectively comprises first regions in which the metal of the metallic layer is provided and second regions in which the metal of the metallic layer is not provided, the first and second regions of the first metallic layer are arranged in accordance with a first regular one-dimensional or two-dimensional raster and the first and second regions of the second metallic layer are arranged in accordance with a second regular one-dimensional or two-dimensional raster, wherein the first and second rasters are oriented in mutually accurate register relationship, and
wherein the raster widths of the first and second rasters coincide and wherein the first and second rasters are so oriented relative to each other that the first regions of the first metallic layer are arranged in the region of the second regions of the second metallic layer and vice-versa.

2. A film element comprising:
a flexible single-layer or multi-layer carrier film;
a first metallic layer provided on a first surface of the carrier film;
a masking layer provided on a second surface of the carrier film opposite to the first surface;
a second metallic layer arranged on the side of the first surface; and
one or more further layers arranged between the first and second metallic layers,
wherein the masking layer comprises a pattern of regions including regions in which material of the masking layer is present and regions in which material of the masking layer is not present, and
wherein the first metallic layer and the second metallic layer respectively comprises first regions in which the metal of the metallic layer is provided and second regions in which the metal of the metallic layer is not provided, the first and second regions of the first metallic layer are arranged in accordance with a first regular one-dimensional or two-dimensional raster and the first and second regions of the second metallic layer are arranged in accordance with a second regular one-dimensional or two-dimensional raster, wherein the first and second rasters are oriented in mutually accurate register relationship, and
wherein the first and second rasters are identical rasters arranged in a phase displacement of about 180° relative to each other.

3. A film element according to claim 1 , wherein the pattern of regions of the masking layer in which material of the masking layer is present is in coincident superposed relationship with the pattern of regions of the second metallic layer in which material of the second metallic layer is present.

4. A film element according to claim 1 , wherein the carrier film comprises a first replication layer, and wherein the one or more further layers arranged between the first and second metallic layers comprises a second replication layer, and wherein a first optical-diffraction relief structure is shaped into a surface of the first replication layer and a second optical-diffraction relief structure is shaped into a surface of the second replication layer.

5. A film element according to claim 4 , wherein the metal of the first metallic layer is disposed on the first optical-diffraction relief structure and the metal of the second metallic layer is disposed on the second optical-diffraction relief structure.

6. A film element according to claim 1 , wherein the first metallic layer comprises silver and is of a layer thickness of 20 to 40 nm.

7. A film element according to claim 1 , wherein the second metallic layer comprises copper and is of a layer thickness of 10 to 50 nm.

8. A film element according to claim 1 , wherein the second metallic layer comprises two or more mutually superposed sublayers of different metals.

9. A film element according to claim 1 , wherein the masking layer comprises a metal or a metal alloy.

10. A film element according to claim 1 , wherein the masking layer comprises two or more layers and in that respect includes one or more metal layers.

11. A film element according to claim 1 , wherein the carrier film has a release layer which permits release of a film body including the first and second metallic layers from the film element.

12. A film element according to claim 1 , wherein the carrier film has a release layer which permits release of a film body including the masking layer from the film element.

Assignees

• Leonhard Kurz Stiftung & Co Kg

Inventors

• Brehm Ludwig
• Katschorek Haymo
• Laus Norbert

Classifications

• B42D25/346

  Perforations · CPC title

• B42D25/41

  using electromagnetic radiation (B42D25/435 takes precedence) · CPC title

• Y10T428/24752

  Laterally noncoextensive components · CPC title

• B42D25/43

  by removal of material · CPC title

• B42D25/29

  Securities; Bank notes · CPC title