Barrier-layer capacitor and process for the production thereof

US4340898A · kind A · utility

Assignee

• Draloric Electronic GmbH · DE

Inventor

• Rudolf Fink · Selb, DE

Key dates

• Filing date: May 7, 1979
• Grant date: Jul 20, 1982
• Expiry date: May 7, 1999

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01G4/1272
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A barrier layer capacitor and a process for producing that capacitor: A central reduction layer formed of ceramic material is produced with a rectangular cross-section. A reoxidation layer is formed on all of the surfaces and is removed from one of the surfaces. Grooves are formed in opposite surfaces, including the one from which the reoxidation layer has been removed. A metal layer is applied around the entire capacitor body, except on the surface from which the reoxidation layer has been removed. Narrow strips are removed from the metal layer on the sides adjacent the surface without the reoxidation layer and at a location slightly away from that reoxidation layer free surface. On the reoxidation layer free surface, a connection coating is applied which extends up to the unremoved portion of the solderable metal coating. The capacitor may be cut from an elongated bar. The bar from which the capacitor may be cut may be the width of two capacitors and it may be separated along the line running through the center into two individual capacitors. In that event, the ceramic bar has a longitudinally extending borehole therethrough which becomes the conductor receiving grooves upon sepa…