Patents by Inventor Diptarka Majumdar

Diptarka Majumdar 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).

  • Publication number: 20230107273
    Abstract: Described are substrates including a layer of an aluminum alloy with a conductive coating, also referred to as a protective overlayer. The conductive coating can prevent certain material from coming into contact with the aluminum alloy layer while allowing transmission of electrons to the aluminum alloy. The substrates may be used, for example, in electronics applications, such as current collectors or electrodes for batteries, electrochemical cells, capacitors, supercapacitors, or the like.
    Type: Application
    Filed: March 8, 2021
    Publication date: April 6, 2023
    Applicants: Novelis Inc., Georgia Tech Research Corporation
    Inventors: Diptarka Majumdar, Venkatesh Sundaram, Matthew McDowell, Francisco J. Quintero Cortes, DaeHoon Kang
  • Publication number: 20140124713
    Abstract: Provided are high-aspect ratio printable thick film metal paste compositions that can be deposited onto a substrate using, for example, screening printing techniques; and methods of preparing and using thick film printable metal pastes; and methods of screen printing of the thick film metal paste compositions onto a substrate to produce printed circuits, conductive lines or features on the substrate and/or a conductive surface on a solar cell device. Also provided are printed substrates containing an electronic feature produced by the high-aspect ratio printable thick film metal paste compositions.
    Type: Application
    Filed: March 29, 2012
    Publication date: May 8, 2014
    Inventors: Diptarka Majumdar, Hsien Ker, Philippe Schottland, Michael McAllister
  • Publication number: 20110048527
    Abstract: This invention provides a silver thick film paste composition comprising a silver powder comprising silver particles, each said silver particle comprising silver components 100-2000 nm long, 20-100 nm wide and 20-100 nm thick assembled to form a spherically-shaped, open-structured particle, wherein the d50 particle size is from about 2.5 ?m to about 6 ?m. There is also provided a method of making a semiconductor device, and in particular a solar cell, using the silver thick film paste composition to form a front side electrode.
    Type: Application
    Filed: April 30, 2010
    Publication date: March 3, 2011
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Roberto Irizarry, Diptarka Majumdar
  • Patent number: 7741189
    Abstract: A method of embedding thick-film fired-on-foil capacitors includes entirely covering the dielectric with an encapsulating electrode to avoid cracking in the dielectric due to shrinkage and temperature coefficient of expansion differences between the electrode and dielectric.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: June 22, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: William J. Borland, Saul Ferguson, Diptarka Majumdar, Richard Ray Traylor
  • Patent number: 7649361
    Abstract: Making process test capacitors simultaneously with circuit capacitors that are to be embedded into a printed wiring board and firing the test capacitors to result in fired-on-foil test capacitors for the purpose of using the test capacitors as test substitutes for the embedded circuit capacitors to predict whether capacitance, dissipation factor or insulation resistance of the circuit capacitors will fall within acceptable specified ranges prior to and after embedment.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: January 19, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: William Borland, Saul Ferguson, Diptarka Majumdar, Daniel I. Amey
  • Patent number: 7586198
    Abstract: Innerlayer panels are provided with high density fiducials during manufacture. The fiducials can be identified using X-rays without etching away portions of the innerlayer panel to expose the fiducials.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: September 8, 2009
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: William J. Borland, Saul Ferguson, Diptarka Majumdar, Matthew C. Snogren, Richard H. Snogren
  • Publication number: 20080145995
    Abstract: Making process test capacitors simultaneously with circuit capacitors that are to be embedded into a printed wiring board and firing the test capacitors to result in fired-on-foil test capacitors for the purpose of using the test capacitors as test substitutes for the embedded circuit capacitors to predict whether capacitance, dissipation factor or insulation resistance of the circuit capacitors will fall within acceptable specified ranges prior to and after embedment.
    Type: Application
    Filed: December 18, 2006
    Publication date: June 19, 2008
    Applicant: E.I. du Pont de Nemours and Company
    Inventors: William J. Borland, Saul Ferguson, Diptarka Majumdar, Daniel I. Amey
  • Publication number: 20070244267
    Abstract: Compositions comprising: an epoxy containing cyclic olefin resin with a water absorption of 2% or less; one or more phenolic resins with water absorption of less than 2% or less; an epoxy catalyst; optionally one or more of an electrically insulated filler, a defoamer and a colorant and one or more organic solvents. The compositions are useful as encapsulants and have a cure temperature of 190° C. or less.
    Type: Application
    Filed: April 10, 2006
    Publication date: October 18, 2007
    Inventors: Thomas Dueber, John Summers, William Borland, Olga Renovales, Diptarka Majumdar, Daniel Amey
  • Publication number: 20070236859
    Abstract: An organic encapsulant composition applied to formed-on-foil ceramic capacitors and embedded inside printed wiring boards allows the capacitor to resist printed wiring board chemicals and pass 1000 hours of accelerated life testing conducted under high humidity, elevated temperature and applied DC bias.
    Type: Application
    Filed: April 10, 2006
    Publication date: October 11, 2007
    Inventors: William Borland, Thomas Dueber, John Summers, Olga Renovales, Diptarka Majumdar
  • Patent number: 7178229
    Abstract: Innerlayer panels are provided with high density fiducials during manufacture. The fiducials can be identified using X-rays without etching away portions of the innerlayer panel to expose the fiducials.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: February 20, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: William J. Borland, Saul Ferguson, Diptarka Majumdar, Matthew C. Snogren, Richard H. Snogren
  • Publication number: 20060282999
    Abstract: Disclosed is an improved method of embedding capacitors in printed wiring boards (PWB) made from thick film dielectrics and electrodes.
    Type: Application
    Filed: June 15, 2006
    Publication date: December 21, 2006
    Inventors: Diptarka Majumdar, Saul Ferguson
  • Publication number: 20060284280
    Abstract: A method of embedding thick-film fired-on-foil capacitors includes entirely covering the dielectric with an encapsulating electrode to avoid cracking in the dielectric due to shrinkage and temperature coefficient of expansion differences between the electrode and dielectric.
    Type: Application
    Filed: June 15, 2006
    Publication date: December 21, 2006
    Inventors: William Borland, Saul Ferguson, Diptarka Majumdar, Richard Traylor
  • Publication number: 20060101639
    Abstract: Innerlayer panels are provided with high density fiducials during manufacture. The fiducials can be identified using X-rays without etching away portions of the innerlayer panel to expose the fiducials.
    Type: Application
    Filed: December 29, 2005
    Publication date: May 18, 2006
    Inventors: William Borland, Saul Ferguson, Diptarka Majumdar, Matthew Snogren, Richard Snogren
  • Publication number: 20050111206
    Abstract: Innerlayer panels are provided with high density fiducials during manufacture. The fiducials can be identified using X-rays without etching away portions of the innerlayer panel to expose the fiducials.
    Type: Application
    Filed: November 20, 2003
    Publication date: May 26, 2005
    Inventors: William Borland, Saul Ferguson, Diptarka Majumdar, Matthew Snogren, Richard Snogren
  • Patent number: 5861136
    Abstract: The invention is directed to a method for the manufacture of fully dense, finely divided, spherical particles of copper I oxide with controlled particle size distribution. The invention is further directed to a method for the manufacture of finely divided, spherical particles of copper I oxide with controlled particle size distribution.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: January 19, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Howard David Glicksman, Toivo Tarmo Kodas, Diptarka Majumdar
  • Patent number: 5616165
    Abstract: The invention is directed to a method for the manufacture of substantially fully densified, finely divided particles of gold wherein the operating temperature is below the melting point of gold.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: April 1, 1997
    Assignees: E. I. Du Pont de Nemours and Company, University of New Mexico
    Inventors: Howard D. Glicksman, Toivo T. Kodas, Diptarka Majumdar