Abstract: An electrical capacitor is formed utilizing a thin dielectric layer which is metallized on both sides to provide electrode areas. Unmetallized margin areas are provided on one side of the dielectric layer along the longitudinal edges of the layer, an unmetallized strip is provided in the center of the other side of the dielectric area which extends along the longitudinal dimension of the layer. The capacitor is formed by pleating, or folding, the dielectric layer once along its longitudinal dimension in the unmetallized central strip area slightly off of the center line of the dielectric layer, so that the unmetallized strip is on the inside of the pleat. The ends of the metallized dielectric layer which contain the unmetallized margin areas are thus staggered so that one end extends beyond the other.
Abstract: A self-healing electrical coil capacitor, in particular for AC applications, comprising dielectric films of polypropylene. Metal coatings are provided on the films and exposed margins are left at the longitudinal sides of the films. The films are swelled in the region of the exposed margins. As a result, the previously observed decrease in capacity which occurred during the operation of such AC capacitors can be eliminated to a large extent.
Type:
Grant
Filed:
April 18, 1977
Date of Patent:
October 17, 1978
Assignee:
Siemens Aktiengesellschaft
Inventors:
Reiner Simson, Karl-Heinz Schindhelm, Werner Vogel
Abstract: Improved electrical capacitors are formed utilizing a thin dielectric layer which is metallized with an aluminum layer and a protective layer of metal, such as lead, tin or zinc, which does not readily oxidize in air is deposited on the aluminum layer. Capacitors of this type are formed by pleating, or folding, the dielectric layer so that one portion of an electrode is brought into contact with or adjacent to another portion of the same or of the opposite electrode. The protective layer prevents conversion of the aluminum layer between the adjacent electrode areas to insulating aluminum oxide, which could otherwise occur during the application of a high voltage pulse during testing or use of the capacitor.
Abstract: An integrated electrical component is provided which functions as an inductive-capacitive network, and which may be used, for example, to form a filter, transformer, or the like. The component includes distributed capacitance and inductance with external connections to permit a variety of distributed element configurations, which results in the elimination of spurious electromagnetic radiation from the component and in the packaging of a multiple-pole filter in an extremely compact configuration, so as to provide a variety of filter networks, or the like, each of high quality factor (Q). The component comprises one or more sheets of dielectric material formed, for example, of a ceramic, and having one or more conductive sheets positioned on each dielectric sheet. The resulting assembly is turned into a spiral configuration, as will be described, to form the component, and the resulting assembly is then cured.
Abstract: A technique is described for depositing organic layers down to a fraction of a monolayer thickness upon insulating substrates by non-vacuum deposition techniques which permit the subsequent deposition of mechanically stable adherent films of b.c.c. tantalum of low resistivity. The deposited films permit the fabrication of low cost, high frequency performance tantalum thin film capacitors.
Type:
Grant
Filed:
May 13, 1976
Date of Patent:
July 19, 1977
Assignee:
Bell Telephone Laboratories, Incorporated