Patents by Inventor John (Bon-Woong) Koo

John (Bon-Woong) Koo 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: 8263944
    Abstract: In an ion implanter, an inert gas is directed at a cathode assembly near an ion source chamber via a supply tube. The inert gas is provided with a localized directional flow toward the cathode assembly to reduce unwanted concentrations of cleaning or dopant gases introduced into the ion source chamber, thereby reducing the effects of unwanted filament growth in the cathode assembly and extending the manufacturing life of the ion source.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: September 11, 2012
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: John Bon-Woong Koo, David J. Twiss, Chris Campbell, Frank Sinclair, Alexander S. Perel, Craig R. Chaney, Wilhelm P. Platow, Eric R. Cobb
  • Patent number: 8003956
    Abstract: An ion implantation system for neutralizing the space charge effect associated with a high current low energy ion beam. The implantation system includes an ion source configured to receive a dopant gas and generate ions having a particular energy and mass from which ions are extracted through an aperture. A work piece positioned downstream of the ion source for receiving the extracted ions in the form of an ion beam. A bleed gas channel disposed between the ion source and the work piece. The bleed gas channel supplying a gas used to neutralize the space charge effect associated with the ion beam.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: August 23, 2011
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: D. Jeffrey Lischer, John (Bon-Woong) Koo, Peter F. Kurunczi, Shardul Patel, Wilhelm P. Platow
  • Patent number: 8003498
    Abstract: Several examples of a method for processing a substrate are disclosed. In a particular embodiment, the method may include: introducing a plurality of first particles to a first region of the substrate so as to form at least one crystal having a grain boundary in the first region without forming another crystal in a second region, the second region adjacent to the first region; and extending the grain boundary of the at least one crystal formed in the first region to the second region after stopping the introducing the plurality of first particles.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: August 23, 2011
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Jonathan G. England, Frank Sinclair, John (Bon-Woong) Koo, Rajesh Dorai, Ludovic Godet
  • Publication number: 20100155619
    Abstract: In an ion implanter, an inert gas is directed at a cathode assembly near an ion source chamber via a supply tube. The inert gas is provided with a localized directional flow toward the cathode assembly to reduce unwanted concentrations of cleaning or dopant gases introduced into the ion source chamber, thereby reducing the effects of unwanted filament growth in the cathode assembly and extending the manufacturing life of the ion source.
    Type: Application
    Filed: December 22, 2008
    Publication date: June 24, 2010
    Applicant: Varian Semiconductor Equipment Associates Inc.
    Inventors: John Bon-Woong Koo, David J. Twiss, Chris Campbell, Frank Sinclair, Alexander S. Perel, Craig R. Chaney, Wilhelm P. Platow, Eric R. Cobb
  • Publication number: 20100084582
    Abstract: An ion implantation system for neutralizing the space charge effect associated with a high current low energy ion beam. The implantation system includes an ion source configured to receive a dopant gas and generate ions having a particular energy and mass from which ions are extracted through an aperture. A work piece positioned downstream of the ion source for receiving the extracted ions in the form of an ion beam. A bleed gas channel disposed between the ion source and the work piece. The bleed gas channel supplying a gas used to neutralize the space charge effect associated with the ion beam.
    Type: Application
    Filed: October 3, 2008
    Publication date: April 8, 2010
    Applicant: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC.
    Inventors: D. Jeffrey LISCHER, John (Bon-Woong) KOO, Peter F. KURUNCZI, Shardul PATEL, Wilhelm P. PLATOW
  • Publication number: 20090124066
    Abstract: Several examples of a method for processing a substrate are disclosed. In a particular embodiment, the method may include: disposing a substrate having an upper surface and a lower surface on a platen contained in a chamber; generating a plasma containing a plurality of charged particles above the upper surface of the substrate, the plasma having a cross sectional area equal to or greater than a surface area of the upper surface of the substrate; applying a first bias voltage to the substrate to attract the charged particles toward the upper surface of the substrate; introducing the charged particles to a region extending under entire upper surface of the substrate; and initiating, concurrently, a first phase transformation in the region from the amorphous phase to a crystalline phase.
    Type: Application
    Filed: November 12, 2008
    Publication date: May 14, 2009
    Applicant: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC.
    Inventors: Jonathan G. ENGLAND, Frank Sinclair, John (Bon-Woong) Koo, Rajesh Dorai, Ludovic Godet
  • Publication number: 20090124065
    Abstract: Several examples of a method for processing a substrate are disclosed. In a particular embodiment, the method may include: disposing a substrate having an upper surface and a lower surface on a platen contained in a chamber; generating a plasma containing a plurality of charged particles above the upper surface of the substrate, the plasma having a cross sectional area equal to or greater than a surface area of the upper surface of the substrate; applying a first bias voltage to the substrate to attract the charged particles toward the upper surface of the substrate; introducing the charged particles to a region extending under entire upper surface of the substrate; and initiating, concurrently, a first phase transformation in the region from the amorphous phase to a crystalline phase.
    Type: Application
    Filed: November 12, 2008
    Publication date: May 14, 2009
    Applicant: VARIAN SEMICONDUCTOR EQUIPMENT ASSOCIATES, INC.
    Inventors: Jonathan G. ENGLAND, Frank Sinclair, John (Bon-Woong) Koo, Rajesh Dorai, Ludovic Godet