Manufacture having double sided features in a metal-containing web formed by etching

Abstract From the Canadian patent

To achieve a large thickness of conductive metal-containing material in a feature of a product unit processed with a liquid-based etch process the , desired thickness of material is apportioned to the two opposing surfaces of a substrate to create a two-part feature. Conventional features are made by identically patterning two same-thickness metal-containing layers and electrically connecting the resulting patterned parts in any suitable manner. However, features may also be made that do not have identical parts on opposite sides of the substrate, the two parts being electrically connected but differing in thickness, in shape, or both. Moreover having two metal-, containing layers …