Patents by Inventor Michael KERSCHER

Michael KERSCHER 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).

  • Process for the preparation of polycrystalline silicon
    Patent number: 10400329
    Abstract: Siemens reactors for polysilicon deposition may employ faster and/or more economical deposition conditions without reduction in yield, by pre-sorting polysilicon rods into different quality classifications prior to comminution, and further sorting the polysilicon fragments in each classification into further classifications.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: September 3, 2019
    Assignee: WACKER CHEMIE AG
    Inventors: Michael Kerscher, Reiner Pech, Armin Sandner
  • Polycrystalline silicon rod and process for production thereof
    Patent number: 9481578
    Abstract: The invention provides a polycrystalline silicon rod having a total diameter of at least 150 mm, including a core A having a porosity of 0 to less than 0.01 around a thin rod, and at least two subsequent regions B and C which differ in porosity by a factor of 1.7 to 23, the outer region C being less porous than region B.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: November 1, 2016
    Assignee: Wacker Chemie AG
    Inventors: Martin Weber, Erich Dornberger, Michael Kerscher, Heinz Kraus, Reiner Pech
  • PROCESS FOR THE PREPARATION OF POLYCRYSTALLINE SILICON
    Publication number: 20160068949
    Abstract: Siemens reactors for polysilicon deposition may employ faster and/or more economical deposition conditions without reduction in yield, by pre-sorting polysilicon rods into different quality classifications prior to comminution, and further sorting the polysilicon fragments in each classification into further classifications.
    Type: Application
    Filed: March 24, 2014
    Publication date: March 10, 2016
    Inventors: Michael KERSCHER, Reiner PECH, Armin SANDNER
  • POLYCRYSTALLINE SILICON ROD AND PROCESS FOR PRODUCTION THEREOF
    Publication number: 20150166351
    Abstract: The invention provides a polycrystalline silicon rod having a total diameter of at least 150 mm, including a core A having a porosity of 0 to less than 0.01 around a thin rod, and at least two subsequent regions B and C which differ in porosity by a factor of 1.7 to 23, the outer region C being less porous than region B.
    Type: Application
    Filed: February 27, 2015
    Publication date: June 18, 2015
    Inventors: Martin WEBER, Erich DORNBERGER, Michael KERSCHER, Heinz KRAUS, Reiner PECH
  • Polycrystalline silicon rod and process for production thereof
    Patent number: 8999516
    Abstract: The invention provides a polycrystalline silicon rod having a total diameter of at least 150 mm, including a core A having a porosity of 0 to less than 0.01 around a thin rod, and at least two subsequent regions B and C which differ in porosity by a factor of 1.7 to 23, the outer region C being less porous than region B.
    Type: Grant
    Filed: May 3, 2013
    Date of Patent: April 7, 2015
    Assignee: Wacker Chemie AG
    Inventors: Martin Weber, Erich Dornberger, Michael Kerscher, Heinz Kraus, Reiner Pech
  • POLYCRYSTALLINE SILICON ROD AND PROCESS FOR PRODUCTION THEREOF
    Publication number: 20130295408
    Abstract: The invention provides a polycrystalline silicon rod having a total diameter of at least 150 mm, including a core A having a porosity of 0 to less than 0.01 around a thin rod, and at least two subsequent regions B and C which differ in porosity by a factor of 1.7 to 23, the outer region C being less porous than region B.
    Type: Application
    Filed: May 3, 2013
    Publication date: November 7, 2013
    Applicant: Wacker Chemie AG
    Inventors: Martin WEBER, Erich DORNBERGER, Michael KERSCHER, Heinz KRAUS, Reiner PECH