Production of partially metallised grating structures

Details Production of partially metallised grating structures Production of partially metallised grating structures

1996-05-17

1998-06-02

Martin, Roland

Etching a substrate: processes

Forming or treating optical article

216 32, 216 34, 216 35, B29D 1100

Patent

active

057594201

ABSTRACT:
A process for producing a partially transparent, visually discernible surface pattern with surface elements which diffusely scatter, reflect or diffract light incident on the surface pattern commences with a base foil which may include a carrier foil and a lacquer layer, and also an intermediate layer between these two layers to provide for good adhesion. Before or after application of the microscopically fine relief structures in the lacquer layer, the free surface thereof is covered over its entire area with a reflection layer. A printed image is then printed with an etching agent for the reflective material on the reflection layer in such a way that, at surface portions corresponding to the printed image, the reflection layer is removed and the surface of the lacquer layer is exposed again. The exposed surfaces of the lacquer layer and the remaining surfaces of the reflection layer are covered with at least one protective layer so that the relief structures are embedded in a plastic laminate and adhesive bridges are formed where the lacquer layer and protective layer are in direct contact.

REFERENCES:
patent: 3647508 (1972-03-01), Gorrell
patent: 4662653 (1987-05-01), Greenaway
patent: 5004673 (1991-04-01), Vlannes
patent: 5300190 (1994-04-01), Sugimoto et al.

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