Verfahren zur Herstellung elektrischer Schaltungsträger

摘要

To manufacture electrical circuit bases with extremely fine conducting paths, laminates without metal foil coverings are used as the initial materials; to produce the holes, a temporary metal layer is applied to the laminate surfaces, that metal layer is structured and etched and removed from the laminate surfaces once the holes have been etched in the laminate. A foundation metal layer is then deposited on the laminate surfaces, including the hole walls, to create the conducting paths; this is done by the glow discharge decomposition of volatile metal compounds. Further metal layers are applied to those layers without current and/or electrolytically. The metal layers are structured using photomask techniques.