Method for producing an improved electrical layer capacitor

A method for the production of a capacitor, comprising the steps of:

• providing an insulating synthetic resin plate, a thickness of which corresponds to a width of a carrier band to be employed in producing the capacitor;
• on opposite side walls of the plate sealing on a contact layer of a high melting metal which is non-melting at a temperature of soldering during mounting of the capacitor;
• applying onto the sealed-on metal layers a soldering metal layer;
• separating the plate into the individual carrier bands which are to be later separated into the individual capacitors, the carrier band having top and bottom cut surfaces;
• vapor depositing a valve metal layer on the top surface of the carrier band which extends over a side edge of and into contact with one of the contact layers but not the other;
• applying a flat surface mask over portions of the valve metal layer which are not to be capacitively active in a region of said edge of the contact layer;
• gas discharge polymerizing with an electrical gas discharge a dielectric layer onto the valve metal layer and mask, the dielectric layer tapering to substantially zero thickness at a corner formed between an edge of the mask and the valve metal layer being coated;
• removing the mask and similarly vapor depositing successive metal layers alternating with successive gas discharge polymerization layers with appropriate masks onto the initial polymerization layer such that alternate metal layers connect to the same frontal contact layers;
• and
• separating capacitor strips which arise in this manner into the individual capacitors.