Process and apparatus for manufacturing thin perforated foils by electroforming.

摘要

The apparatus comprises an electrically conductive cathode (3) having an active surface which has at least one island which is not receptive to deposition. This island (4) is embedded in the cathode and has an outer face situated flush with the active surface of the cathode. This island may be formed in a hollow arranged either in the active surface of the cathode or in a conductive layer deposited onto this active surface. The island may be formed by localised deposition or by continuous deposition and selective removal depending on the desired pattern. A metal layer is formed by electrodeposition on the cathode thus prepared and the perforated sheet (1) is then detached. <IMAGE>