Patents by Inventor Gerhard Ast

Gerhard Ast 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).

  • Method and device for processing semiconductor material
    Patent number: 6313013
    Abstract: There are a device and method for protecting semiconductor material, wherein semiconductor material is processed on a surface of stabilized ice made from ultrapure water and particles of semiconductor material.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: November 6, 2001
    Assignee: Wacker-Chemie GmbH
    Inventors: Dirk Flottmann, Gerhard Ast, Reinhard Wolf
  • Process for making solar cell base material
    Patent number: 4366024
    Abstract: Competitive current generation by the exploitation of solar energy requires cheap solar cells. A process is described which makes it possible to manufacture from silicon a base material for solar cells of this type in an economical manner and in large quantities. This is achieved by bringing silicon from a supply container into contact with a non-elemental lubricating melt, which is immiscible with silicon but will not wet silicon and has a melting point below that of silicon, and by drawing off a silicon film, sliding on this lubricating melt, and solidifying the silicon continuously by cooling to below its' melting point.
    Type: Grant
    Filed: January 25, 1980
    Date of Patent: December 28, 1982
    Assignee: Heliotronic Forschungs-und Entwicklungsgesellschaft fur Solarzellen-Grundstoffe mbH
    Inventors: Gerhard Ast, Josef Dietl, Dieter Helmreich, Hans-Dieter Miller, Erhard Sirtl