Patents by Inventor Zhigang Rick Li

Zhigang Rick Li 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 forming an electrically conductive structure on a substrate
    Patent number: 9284459
    Abstract: A conductive paste composition contains a source of an electrically conductive metal, an alkaline-earth-metal boron tellurium oxide, and an organic vehicle. An article such as a high-efficiency photovoltaic cell is formed by a process of deposition of the paste composition on a semiconductor device substrate (e.g., by screen printing) and firing the paste to remove the organic vehicle and sinter the metal and establish electrical contact between it and the device.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: March 15, 2016
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Zhigang Rick Li, Kurt Richard Mikeska, David Herbert Roach, Carmine Torardi, Paul Douglas Vernooy
  • Conductive paste composition containing lithium, and articles made therefrom
    Patent number: 9129725
    Abstract: A paste composition contains an electrically conductive silver powder, one or more glass frits or fluxes, and a lithium compound dispersed in an organic medium. The paste is useful in forming an electrical contact on the front side of a solar cell device having an insulating layer. The lithium compound aids in establishing a low-resistance electrical contact between the front-side metallization and underlying semiconductor substrate during firing.
    Type: Grant
    Filed: December 9, 2011
    Date of Patent: September 8, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven Dale Ittel, Zhigang Rick Li, Kurt Richard Mikeska, Paul Douglas Vernooy
  • CONDUCTIVE PASTE COMPOSITION AND SEMICONDUCTOR DEVICES MADE THEREWITH
    Publication number: 20150068598
    Abstract: A conductive paste composition contains a source of an electrically conductive metal, an alkaline-earth-metal boron tellurium oxide, and an organic vehicle. An article such as a high-efficiency photovoltaic cell is formed by a process of deposition of the paste composition on a semiconductor device substrate (e.g., by screen printing) and firing the paste to remove the organic vehicle and sinter the metal and establish electrical contact between it and the device.
    Type: Application
    Filed: November 19, 2014
    Publication date: March 12, 2015
    Inventors: ZHIGANG RICK LI, Kurt Richard Mikeska, David Herbert Roach, Carmine Torardi, Paul Douglas Vernooy
  • Conductive paste composition and semiconductor devices made therewith
    Patent number: 8900488
    Abstract: A conductive paste composition contains a source of an electrically conductive metal, an alkaline-earth-metal boron tellurium oxide, and an organic vehicle. An article such as a high-efficiency photovoltaic cell is formed by a process of deposition of the paste composition on a semiconductor device substrate (e.g., by screen printing) and firing the paste to remove the organic vehicle and sinter the metal and establish electrical contact between it and the device.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: December 2, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: Zhigang Rick Li, Kurt Richard Mikeska, David Herbert Roach, Carmine Torardi, Paul Douglas Vernooy
  • CONDUCTIVE PASTE COMPOSITION AND SEMICONDUCTOR DEVICES MADE THEREWITH
    Publication number: 20140061830
    Abstract: A conductive paste composition contains a source of an electrically conductive metal, an alkaline-earth-metal boron tellurium oxide, and an organic vehicle. An article such as a high-efficiency photovoltaic cell is formed by a process of deposition of the paste composition on a semiconductor device substrate (e.g., by screen printing) and firing the paste to remove the organic vehicle and sinter the metal and establish electrical contact between it and the device.
    Type: Application
    Filed: September 3, 2013
    Publication date: March 6, 2014
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: ZHIGANG RICK LI, Kurt Richard Mikeska, David Herbert Roach, Carmine Torardi, Paul Douglas Vernooy
  • Conductive paste composition containing lithium, and articles made therefrom
    Patent number: 8486308
    Abstract: A lead-free paste composition contains an electrically conductive silver powder, one or more glass frits or fluxes, and a lithium compound dispersed in an organic medium. The paste is useful in forming an electrical contact on the front side of a solar cell device having an insulating layer. The lithium compound aids in establishing a low-resistance electrical contact between the front-side metallization and underlying semiconductor substrate during firing.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: July 16, 2013
    Assignee: E I du Pont de Nemours and Company
    Inventors: Steven Dale Ittel, Zhigang Rick Li, Kurt Richard Mikeska, Paul Douglas Vernooy
  • CONDUCTIVE PASTE COMPOSITION CONTAINING LITHIUM, AND ARTICLES MADE THEREFROM
    Publication number: 20130000714
    Abstract: A paste composition contains an electrically conductive silver powder, one or more glass frits or fluxes, and a lithium compound dispersed in an organic medium. The paste is useful in forming an electrical contact on the front side of a solar cell device having an insulating layer. The lithium compound aids in establishing a low-resistance electrical contact between the front-side metallization and underlying semiconductor substrate during firing.
    Type: Application
    Filed: December 9, 2011
    Publication date: January 3, 2013
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: STEVEN DALE ITTEL, Zhigang Rick Li, Kurt Richard Mikeska, Paul Douglas Vernooy
  • LOW BOW ALUMINUM PASTE WITH AN ALKALINE EARTH METAL SALT ADDITIVE FOR SOLAR CELLS
    Publication number: 20120325307
    Abstract: Disclosed are aluminum paste compositions for forming an aluminum back electrode, processes to form aluminum back electrode of solar cells, and the solar cells so-produced. The aluminum paste composition has particulate aluminum and an additive wherein the additive is a salt of an alkaline earth metal ion and an organic counterion dispersed in an organic vehicle.
    Type: Application
    Filed: December 16, 2011
    Publication date: December 27, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: ZHIGANG RICK LI, LIANG LIANG, RAJ G. RAJENDRAN
  • CONDUCTIVE PASTE COMPOSITION CONTAINING LITHIUM, AND ARTICLES MADE THEREFROM
    Publication number: 20120313198
    Abstract: A lead-free paste composition contains an electrically conductive silver powder, one or more glass frits or fluxes, and a lithium compound dispersed in an organic medium. The paste is useful in forming an electrical contact on the front side of a solar cell device having an insulating layer. The lithium compound aids in establishing a low-resistance electrical contact between the front-side metallization and underlying semiconductor substrate during firing.
    Type: Application
    Filed: December 8, 2011
    Publication date: December 13, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Steven Dale Ittel, Zhigang Rick Li, Kurt Richard Mikeska, Paul Douglas Vernooy
  • GLASS COMPOSITIONS USED IN CONDUCTORS FOR PHOTOVOLTAIC CELLS
    Publication number: 20120312372
    Abstract: The invention relates to zinc-containing glass compositions useful in conductive pastes for silicon semiconductor devices and photovoltaic cells.
    Type: Application
    Filed: August 23, 2012
    Publication date: December 13, 2012
    Applicant: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Alan Frederick Carroll, Kenneth Warren Hang, Brian J. Laughlin, Zhigang Rick Li, Hisashi Matsuno, Yueli Wang
  • Glass compositions used in conductors for photovoltaic cells
    Patent number: 8262944
    Abstract: The invention relates to zinc-containing glass compositions useful in conductive pastes for silicon semiconductor devices and photovoltaic cells.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: September 11, 2012
    Assignee: E I du Pont de Nemours and Company
    Inventors: Alan Frederick Carroll, Kenneth Warren Hang, Brian J. Laughlin, Zhigang Rick Li, Hisashi Matsuno, Yueli Wang
  • LOW BOW ALUMINUM PASTE WITH AN ALKALINE EARTH METAL SALT ADDITIVE FOR SOLAR CELLS
    Publication number: 20120152341
    Abstract: The present invention relates to a composition for use as a backside conductive paste in solar cells. The paste comprises aluminum powder, an organic vehicle and an additive comprising a salt of an alkaline earth metal ion and an organic counterion.
    Type: Application
    Filed: December 16, 2010
    Publication date: June 21, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Zhigang Rick LI, Liang Liang, Raj G. Rajendran
  • High-capacitance density thin film dielectrics having columnar grains formed on base-metal foils
    Patent number: 7981741
    Abstract: Deposited thin-film dielectrics having columnar grains and high dielectric constants are formed on heat treated and polished metal foil. The sputtered dielectrics are annealed at low oxygen partial pressures.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: July 19, 2011
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Lijie Bao, Zhigang Rick Li, Damien Reardon, James F. Ryley, Cengiz A. Palanduz
  • GLASS COMPOSITIONS USED IN CONDUCTORS FOR PHOTOVOLTAIC CELLS
    Publication number: 20110147677
    Abstract: The invention relates to zinc-containing glass compositions useful in conductive pastes for silicon semiconductor devices and photovoltaic cells.
    Type: Application
    Filed: June 21, 2010
    Publication date: June 23, 2011
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Alan Frederick Carroll, Kenneth Warren Hang, Brian J. Laughlin, Zhigang Rick Li, Hisashi Matsuno, Yueli Wang
  • PROCESSES FOR THE MANUFACTURE OF BARIUM TITANATE CAPACITORS ON NICKEL FOILS
    Publication number: 20090238955
    Abstract: Provided are processes for the manufacture of capacitors. It is found that by using a nickel foil as the substrate and one electrode of the capacitor and by controlling the oxygen partial pressure in the range of 10?8 to 10?10 atmospheres during the crystallization heat treatment of the barium titanate, the leakage current can be maintained at adequate values without a reoxygenation step.
    Type: Application
    Filed: March 16, 2009
    Publication date: September 24, 2009
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Juan Carlos Figueroa, Zhigang Rick Li, Cengiz Ahmet Palanduz, Damien Francis Reardon, Lei Zhang
  • HIGH-CAPACITANCE DENSITY THIN FILM DIELECTRICS HAVING COLUMNAR GRAINS FORMED ON BASE-METAL FOILS
    Publication number: 20090035913
    Abstract: Deposited thin-film dielectrics having columnar grains and high dielectric constants are formed on heat treated and polished metal foil. The sputtered dielectrics are annealed at low oxygen partial pressures.
    Type: Application
    Filed: August 2, 2007
    Publication date: February 5, 2009
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Lijie Bao, Zhigang Rick Li, Damien F. Reardon, James F. Ryley, Cengiz Ahmet Palanduz