Patents by Inventor Havard Sorheim

Havard Sorheim 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).

  • SILICON NITRIDE BASED CRUCIBLE
    Publication number: 20120275983
    Abstract: A reusable silicon nitride containing crucible is described. The crucible contains boron (B) or a boron containing compound and phosphorous (P) or a phosphorous containing compound. Use of the crucible for crystallizing silicon is also described.
    Type: Application
    Filed: December 22, 2010
    Publication date: November 1, 2012
    Inventors: Håvard Sørheim, Arve Solheim, Egbert Van De Schootbrugge
  • DEVICE FOR HOLDING SILICON MELT
    Publication number: 20120242016
    Abstract: Device for holding a silicon melt comprising a crucible, which partly surrounds an inner chamber for holding the melt, with a base and at least one side wall made of a base material, whereby the crucible comprises at least one equalizing means for equalizing mechanical thermal stresses.
    Type: Application
    Filed: November 29, 2010
    Publication date: September 27, 2012
    Inventors: Bernhard Freudenberg, Josef Stenzenberger, Michael Timm, Arve Solheim, Håvard Sørheim, Egbert van de Schootbrugge
  • METHOD FOR PREPARING OF CERAMIC SHAPED PART, APPARATUS AND USE THEREOF
    Publication number: 20120056359
    Abstract: Method and apparatus for preparing of at least one ceramic shaped part. A cavity is provided between at least one external shape and at least one internal shape. A Si-containing powder composition is then provided in the cavity. The composition is then heated in a reactive gas atmosphere to obtain a reaction bounded ceramic shaped part. Use of the apparatus is also described.
    Type: Application
    Filed: April 23, 2010
    Publication date: March 8, 2012
    Inventors: Håvard Sørheim, Arve Solheim
  • Mould parts of silicon nitride and method for producing such mould parts
    Patent number: 7422631
    Abstract: The present invention relates to silicon nitride mould parts, particularly crucibles for use in connection with directional solidification and pulling of silicon single crystals. The mould parts consist of Si3N4 having a total open porosity between 40 and 60% by volume and where more than 50% of the pores in the surface of the mould parts have a size which is larger than the means size of the Si3N4 particles. The invention further relates to a method for producing the silicon nitride mould parts.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: September 9, 2008
    Assignee: Crusin AS
    Inventors: Espen Olsen, Arve Solheim, Havard Sorheim
  • Method for removing impurities from silicone-containing residues
    Publication number: 20040220421
    Abstract: The present invention relates to a method for removing impurities from elemental silicon-containing residues from the processes of producing organochlorosilane and chlorosilane. The residues are subjected to magnetic seperation to provide a relative pure non-magnetic fraction having an increased silicon content and a relatively impure magnetic fraction having a lower silicon content than the non-magnetic fraction.
    Type: Application
    Filed: March 30, 2004
    Publication date: November 4, 2004
    Inventors: Harry Morten Rong, Havard Sorheim, Harald Arnljot Oye