Patents by Inventor Friedrich-Wilhelm Schulze

Friedrich-Wilhelm Schulze has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8197595
    Abstract: A method for producing thin silicon rods using a floating zone crystallization process includes supplying high frequency (HF) current to a flat induction coil having a central opening, a plurality of draw openings and a plate with a slot as a current supply of the HF current so as to provide a circumfluent current to the central opening. An upper end of a raw silicon rod is heated by induction using the flat induction coil so as to form a melt pool. A thin silicon rod is drawn upwards through each of the plurality of draw openings in the flat induction coil from the melt pool without drawing a thin silicon rod through the central opening having the circumfluent current.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: June 12, 2012
    Assignee: PV Silicon Forschungs und Produktions GmbH
    Inventors: Helge Riemann, Friedrich-Wilhelm Schulze, Joerg Fischer, Matthias Renner
  • Publication number: 20110314869
    Abstract: A method for producing thin silicon rods using a floating zone crystallization process includes supplying high frequency (HF) current to a flat induction coil having a central opening, a plurality of draw openings and a plate with a slot as a current supply of the HF current so as to provide a circumfluent current to the central opening. An upper end of a raw silicon rod is heated by induction using the flat induction coil so as to form a melt pool. A thin silicon rod is drawn upwards through each of the plurality of draw openings in the flat induction coil from the melt pool without drawing a thin silicon rod through the central opening having the circumfluent current.
    Type: Application
    Filed: January 19, 2010
    Publication date: December 29, 2011
    Applicant: PV Silicon Forschungs und Produktions GmbH
    Inventors: Helge Riemann, Friedrich-Wilhelm Schulze, Joerg Fischer, Matthias Renner
  • Patent number: 6082060
    Abstract: For simply affixing flat bodies, including solar modules, onto a support, Z-shaped metal profiles may be glued on the bodies, thus acting at the same time to affix the bodies and as a protective device for the edges of the bodies during transport.
    Type: Grant
    Filed: June 24, 1998
    Date of Patent: July 4, 2000
    Assignee: Siemens Solar GmbH
    Inventors: Ernst Bauer, Friedrich Wilhelm Schulze
  • Patent number: 5620528
    Abstract: A solar cell has electrical conductors applied on a pattern of electric contacts on a front surface and extending transversely relative thereto with a portion projecting beyond the edge of the solar cell. The formation of the electrical pattern includes at least two elongated portions interconnected by a return portion which extends beyond the one edge. This return portion provides a stiffening suitable for reliable interconnection to an additional solar cell to achieve a connection of two conductors in the projecting region.
    Type: Grant
    Filed: September 27, 1995
    Date of Patent: April 15, 1997
    Assignees: Siemens Solar GmbH, Siemens Solar Industries International, Inc.
    Inventors: Reinhart Schade, Gerhard Lehner, Adolf Muenzer, Friedrich-Wilhelm Schulze, Robert Wieting
  • Patent number: 4971772
    Abstract: An inside lining for the reaction chamber of an electric low shaft furnace, particularly for producing high-purity silicon from silicon oxide by carbothermic reduction, is provided which has a melting crucible of dense graphite and a thermal insulation, whereby at least the floor of the reaction chamber has an inside lining of high-purity carbon. The inside lining is constructed from graphite, graphite grits or lampblack. The inside lining provides good thermal insulation and does not further contaminate the molten metal due to furnace materials. The inside lining prevents a loss of material in that seepage of molten metal into the insulation is prevented by a rapid dropoff of the temperature in the insulation below the melting point of the metal.
    Type: Grant
    Filed: February 26, 1990
    Date of Patent: November 20, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hubert Aulich, Friedrich-Wilhelm Schulze, Benedikt Strake
  • Patent number: 4643833
    Abstract: In a method for separating solid reaction products from silicon produced in an arc furnace, molten silicon produced in the arc furnace in a reduction of SiO.sub.2 and carbon is filtered through a heated layer composed of SiC/Si after a so-called holding phase at a temperature in a region above a melting point of the silicon. The layer is preferably fashioned as a bottom plate of a crucible. The melt has eliminated from it SiO.sub.2 and SiC particles contained therein. The method serves for the production of silicon for solar cells. Due to the separation of SiO.sub.2 and SiC out of the molten silicon, an efficiency of above 10% is achieved in the solar cells fabricated from this material.
    Type: Grant
    Filed: April 23, 1985
    Date of Patent: February 17, 1987
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hubert Aulich, Friedrich-Wilhelm Schulze
  • Patent number: 4460556
    Abstract: Highly purified starting materials for the production of silicon suitable for fabrication of solar cells are produced via the carbo-thermal reduction process. A carbon-containing material with impurities therein, either by itself or admixed with glass bodies, which are attained from a melt of quartz sand and glass-forming additives formed into a fiber form and pulverized, is converted into a granulate form with the aid of a bonding agent. The resultant granulates are contacted with a hot inorganic acid, such as 3N HCl at about 90.degree. C., to extract substantially all impurities from the granulates, which can be in pellet or tablet form. The resultant purified pellets are then directly charged into an electrical arc furnace to yield solar-quality silicon. With this process, highly purified SiO.sub.2 and highly purified carbon are produced in a simple and cheap manner. The impurity level for boron, phosphorus and transition metal in these starting materials is less than about 10 ppm.
    Type: Grant
    Filed: April 20, 1983
    Date of Patent: July 17, 1984
    Assignee: Siemens Aktiengesellschaft
    Inventors: Hubert Aulich, Karl-Heinz Eisenrith, Friedrich-Wilhelm Schulze, Hans-Peter Urbach