Patents by Inventor Albert Blank

Albert Blank 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: 9174361
    Abstract: A method for simultaneously slicing a multiplicity of wafers from a substantially circular-cylindrical workpiece that is connected to a sawing strip includes executing a relative movement between the workpiece and a wire gang of a wire saw with the aid of a forward feed device with a defined forward feed rate so as to slice the wafers. The forward feed rate is varied through the course of the method and includes being set to a value v1 at a cutting depth of 50% of the workpiece diameter. Subsequently, the forward feed rate is to a value v2>1.15×v1 as the forward feed rate passes through a local maximum. The forward feed rate is set to a value v3<v1 when the wire gang first comes into contact with the sawing strip. The forward feed rate is increased to a value v5>v3.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: November 3, 2015
    Assignee: SILTRONIC AG
    Inventor: Albert Blank
  • Patent number: 8844511
    Abstract: A method for slicing a plurality of wafers from a crystal includes providing a crystal of semiconductor material having a longitudinal axis, a cross section and at least one pulling edge. The crystal is fixed on a table and guided through a wire gang defined by sawing wire so as to form the wafers. The guiding is provided by a relative movement between the table and the wire gang such that entry sawing or exit sawing using the sawing wire occurs in a vicinity of the at least one pulling edge of the crystal.
    Type: Grant
    Filed: January 20, 2011
    Date of Patent: September 30, 2014
    Assignee: Siltronic AG
    Inventors: Maximilian Kaeser, Albert Blank
  • Publication number: 20130333682
    Abstract: A method for simultaneously slicing a multiplicity of wafers from a substantially circular-cylindrical workpiece that is connected to a sawing strip includes executing a relative movement between the workpiece and a wire gang of a wire saw with the aid of a forward feed device with a defined forward feed rate so as to slice the wafers. The forward feed rate is varied through the course of the method and includes being set to a value v1 at a cutting depth of 50% of the workpiece diameter. Subsequently, the forward feed rate is to a value v2>1.15×v1 as the forward feed rate passes through a local maximum. The forward feed rate is set to a value v3<v1 when the wire gang first comes into contact with the sawing strip. The forward feed rate is increased to a value v5>v3.
    Type: Application
    Filed: June 3, 2013
    Publication date: December 19, 2013
    Inventor: Albert Blank
  • Publication number: 20110192388
    Abstract: A method for slicing a plurality of wafers from a crystal includes providing a crystal of semiconductor material having a longitudinal axis, a cross section and at least one pulling edge. The crystal is fixed on a table and guided through a wire gang defined by sawing wire so as to form the wafers. The guiding is provided by a relative movement between the table and the wire gang such that entry sawing or exit sawing using the sawing wire occurs in a vicinity of the at least one pulling edge of the crystal.
    Type: Application
    Filed: January 20, 2011
    Publication date: August 11, 2011
    Applicant: SILTRONIC AG
    Inventors: Maximilian Kaeser, Albert Blank