Patents by Inventor Randy S. Hahn

Randy S. Hahn 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: 7990683
    Abstract: A method for forming a capacitor including forming an anode from a valve metal; forming an oxide on the anode to form an anodized anode; dipping the anodized anode into a slurry of conductive polymer; drying the intrinsically conductive polymer; and providing external terminations in electrical contact with the anode and the conductive polymer.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: August 2, 2011
    Assignee: Kemet Electronics Corporation
    Inventors: Yongjian Qiu, Randy S. Hahn, Keith R. Brenneman
  • Publication number: 20100246096
    Abstract: A process for forming a capacitor. The process includes providing an anode; providing a dielectric on the anode; exposing the anode to a polymer precursor solution comprising monomer, conjugated oligomer and optionally solvent and polymerizing the polymer precursor. The ratio between monomer and conjugated oligomer ranges from 99.9/0.1 to 75/25 by weight. The solvent content in the polymer precursor solution is from 0 to 99% by weight.
    Type: Application
    Filed: May 19, 2010
    Publication date: September 30, 2010
    Inventors: Qingping Chen, Keith R. Brenneman, Yuhong Ma, Yongjian Qiu, Philip M. Lessner, Randy S. Hahn
  • Patent number: 7754276
    Abstract: A method for maintaining quality of monomer during a coating process for intrinsically conductive polymer which suppresses unwanted by-products. A neutralization process using a base or anion exchange resin is used batch-wise or continuous.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: July 13, 2010
    Assignee: KEMET Electronics Corporation
    Inventors: Yongjian Qiu, Qingping Chen, Philip M. Lessner, Randy S. Hahn, Cynthia L. Prince, Keith R. Brenneman
  • Publication number: 20100053849
    Abstract: Porous sintered anode bodies for capacitors formed from valve metals are treated by electrolysis to form a dielectric layer and coated with cathode layers. When standard parallelepiped shapes are used, cathode coverage at the edges and corners is non-uniform and failures occur at those locations. Rectangular prisms, obround prisms and cylindrical prisms are formed with transition surfaces at edges and corners, such as chamfers and curves, to enhance cathode layer uniformity. The transition surface greatly enhances the application of polymer slurries.
    Type: Application
    Filed: November 9, 2009
    Publication date: March 4, 2010
    Inventors: Jeffrey Poltorak, Yongjian Qiu, Christian Guerrero, Lance Paul Thornton, Randy S. Hahn, James C. Bates, JR., John Prymak
  • Patent number: 7658986
    Abstract: Porous sintered anode bodies for capacitors formed from valve metals are treated by electrolysis to form a dielectric layer and coated with cathode layers. When standard parallelpiped shapes are used, cathode coverage at the edges and corners is non-uniform and failures occur at those locations. Rectangular prisms, obround prisms and cylindrical prisms are formed with transition surfaces at edges and corners, such as chamfers and curves, to enhance cathode layer uniformity. The transition surface greatly enhances the application of polymer slurries.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: February 9, 2010
    Assignee: Kemet Electronics Corporation
    Inventors: Jeffrey Poltorak, Yongjian Qiu, Christian Guerrero, Lance Paul Thornton, Randy S. Hahn, James C. Bates, Jr., John Prymak
  • Patent number: 7563290
    Abstract: A method for forming a capacitor including forming an anode from a valve metal; forming an oxide on the anode to form an anodized anode; dipping the anodized anode into a slurry of conductive polymer; drying the intrinsically conductive polymer; and providing external terminations in electrical contact with the anode and the conductive polymer.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: July 21, 2009
    Assignee: Kemet Electronics Corporation
    Inventors: Yongjian Qiu, Randy S. Hahn, Keith R. Brenneman
  • Publication number: 20080299371
    Abstract: Porous sintered anode bodies for capacitors formed from valve metals are treated by electrolysis to form a dielectric layer and coated with cathode layers. When standard parallelpiped shapes are used, cathode coverage at the edges and corners is non-uniform and failures occur at those locations. Rectangular prisms, obround prisms and cylindrical prisms are formed with transition surfaces at edges and corners, such as chamfers and curves, to enhance cathode layer uniformity. The transition surface greatly enhances the application of polymer slurries.
    Type: Application
    Filed: May 30, 2007
    Publication date: December 4, 2008
    Inventors: Jeffrey Poltorak, Yongjian Qiu, Christian Guerrero, Lance Paul Thornton, Randy S. Hahn, James C. Bates, JR., John Prymak
  • Publication number: 20080283409
    Abstract: A process for forming a capacitor. The process includes providing an anode; providing a dielectric on the anode; exposing the anode to a polymer precursor solution comprising monomer, conjugated oligomer and optionally solvent and polymerizing the polymer precursor. The ratio between monomer and conjugated oligomer ranges from 99.9/0.1 to 75/25 by weight. The solvent content in the polymer precursor solution is from 0 to 99% by weight.
    Type: Application
    Filed: May 16, 2007
    Publication date: November 20, 2008
    Inventors: Qingping Chen, Keith R. Brenneman, Yuhong Ma, Yongjian Qiu, Philip M. Lessner, Randy S. Hahn
  • Publication number: 20080250620
    Abstract: A method for maintaining quality of monomer during a coating process for intrinsically conductive polymer which suppresses unwanted by-products. A neutralization process using a base or anion exchange resin is used batch-wise or continuous.
    Type: Application
    Filed: April 16, 2007
    Publication date: October 16, 2008
    Inventors: Yongjian Qiu, Qingping Chen, Philip M. Lessner, Randy S. Hahn, Cynthia L. Prince, Keith R. Brenneman
  • Publication number: 20080247121
    Abstract: A method for forming a capacitor including forming an anode from a valve metal; forming an oxide on the anode to form an anodized anode; dipping the anodized anode into a slurry of conductive polymer; drying the intrinsically conductive polymer; and providing external terminations in electrical contact with the anode and the conductive polymer.
    Type: Application
    Filed: May 7, 2008
    Publication date: October 9, 2008
    Inventors: Yongjian Qiu, Randy S. Hahn, Keith R. Brenneman
  • Patent number: 7348194
    Abstract: An improved capacitor with an anode with an anode wire and an oxide layer on the surface of the anode. A cathode layer is exterior to the oxide layer. A carbon conductive layer is exterior to the cathode layer wherein the cathode layer comprises 5-75 wt % resin and 25-95 wt % conductor. The conductor has carbon nanotubes. An anode lead is in electrical contact with the anode wire and a cathode lead is in electrical contact with the carbon conductive layer.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: March 25, 2008
    Assignee: Kemet Electronics Corporation
    Inventors: Antony P. Chacko, Qingping Chen, Randy S. Hahn, John T. Kinard, Philip M. Lessner, Anita Melody, legal representative, Brian J. Melody
  • Patent number: 7342775
    Abstract: An anode with an anode body with a first side and a second side opposite to said first side, multiple anode wires and a conductive polymer cathode.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: March 11, 2008
    Assignee: Kemet Electronics Corporation
    Inventors: Randy S. Hahn, Yongjian Qiu
  • Publication number: 20080010797
    Abstract: A method for forming a capacitor including forming an anode from a valve metal; forming an oxide on the anode to form an anodized anode; dipping the anodized anode into a slurry of conductive polymer; drying the intrinsically conductive polymer; and providing external terminations in electrical contact with the anode and the conductive polymer.
    Type: Application
    Filed: July 6, 2006
    Publication date: January 17, 2008
    Inventors: Yongjian Qiu, Randy S. Hahn, Keith R. Brenneman
  • Patent number: 7154742
    Abstract: An anode with narrow flutes (<0.3 mm) allows for the improved penetration of cathode solutions into the anode body and reduces the redistribution which occurs as the solutions are converted to the solid cathode material.
    Type: Grant
    Filed: May 10, 2006
    Date of Patent: December 26, 2006
    Assignee: Kemet Electronics Corporation
    Inventors: Randy S. Hahn, John T. Kinard, Jeffery P. Poltorak, Eric Zediak