Patent ID: 7361379

Claim:
A method of producing a relief structure on a patterned conductor comprising the steps of: coating a layer of conductive material onto a transparent substrate; coating a layer of metal onto the layer of conductive material; coating a layer of photoresist onto the layer of metal; curing the layer of photoresist; exposing, through a first mask, a desired pattern of transparent conductors onto the layer of photoresist; developing the photoresist and simultaneously etching the layer of the conductive material and the layer of metal; exposing, through a second mask, a desired pattern of metal conductors onto the remaining layer of photoresist; developing the photoresist and etching the layer of metal, applying a further layer of photoresist; curing the further layer of photoresist; exposing the further layer of photoresist thorough the substrate; and developing the photoresist and allowing the layer to dry, resulting in a pattern of spacers/reliefs in registration with the metal conductors.