Elektrolytische Kondensatoren mit einer Festelektrolytschicht und ihre Herstellung.

摘要

A capacitor element for a solid electrolytic capacitor is made from a metal plate (1) preferably of aluminium having a row of projections (2-1... 2-n) along one edge or also (3-1... 3-n) the other edge; an insulator resin band (6) is formed across the neck of each projection (2,3) and the cut-off portion is coated successively with layers of a dielectric oxidation coating (7) (e.g. Al2O3), a solid electrolyte 20-50 um thick formed by electrolytic polymerisation in a solution containing pyrrole, furan or thiophene and a supporting boric acid electrolyte to form a polymer layer, and an electrically conductive layer usually composed of graphite (9) and silver paste (10). Each projection is then cut off, and wire terminals are attached to the conductive layer (10) of the plate and to the uncoated portion of the plate. An electrically insulating cladding can be applied through which the terminals project. The element has a low specific resistance due to the high conductivity of the polymeric layer (8). Numerous modifications are described, including multi-layer capacitors made from a stacked plurality of similar elements all fixed together, optionally with intervening copper plates integrated to the conductive layers, "chip-type" capacitors with 4 plate-shaped terminals, and array-type elements comprising stacked plates.