Patents by Inventor Kalipada Palit

Kalipada Palit 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: 6551720
    Abstract: Materials for making a plasma display having a transparent front panel spaced from a back panel which is a metal core having layers of a dielectric material extending over and bonded to the core. The materials of which the back panel is made are chosen to form a back panel having a thermal coefficient of expansion compatible with that of the front panel. The dielectric material is made from a green ceramic tape which is bonded to the core and cofired with the core to form the back panel. The materials for the dielectric can be chosen such that the composite TCE of the cofired assembly matches the TCE of the front panel.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: April 22, 2003
    Assignee: Sarnoff Corporation
    Inventors: Attiganal Narayanaswamy Sreeram, Kalipada Palit, Leszek Hozer, Ellen Schwartz Tormey, Michael James Liberatore
  • Patent number: 6361390
    Abstract: A plasma display device of the type having a composite back plate including a metal substrate and a ceramic barrier rib structure, is formed using a green ceramic tape which is a combination of two glasses, a primary glass which flows back during firing and a secondary glass that has a relatively high thermal coefficient of expansion. These glasses are combined in proportion to match the thermal coefficient of expansion of the metal substrate. Channels are formed on the inner surface of the back panel by laminating a green ceramic tape to the metal substrate and then soaking the laminated tape in a solvent before embossing the green tape to form the ribs. This soaking step enhances the flow of the green ceramic tape during the embossing process. The ceramic components of the green tape are formulated with a particle size 15 &mgr;m or more to enhance particle flow when the green tape is embossed.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: March 26, 2002
    Assignee: Sarnoff Corporation
    Inventors: Attiganal Narayanaswamy Sreeram, Ashok Narayan Prabhu, Les Hozer, Kalipada Palit
  • Publication number: 20020022565
    Abstract: Materials for making a plasma display having a transparent front panel spaced from a back panel which is a metal core having layers of a dielectric material extending over and bonded to the core. The materials of which the back panel is made are chosen to form a back panel having a thermal coefficient of expansion compatible with that of the front panel. The dielectric material is made from a green ceramic tape which is bonded to the core and cofired with the core to form the back panel. The materials for the dielectric can be chosen such that the composite TCE of the cofired assembly matches the TCE of the front panel.
    Type: Application
    Filed: May 2, 2001
    Publication date: February 21, 2002
    Inventors: Attiganal Narayanaswamy Sreeram, Kalipada Palit, Leszek Hozer, Ellen Schwartz Tormey, Michael James Liberatore
  • Patent number: 6286204
    Abstract: An integrated double sided metal supported display device has a green tape stack on both sides of the metal support. The green tape stacks incorporate circuitry and conductor filled vias to access the circuitry electrically on each green tape layer. The metal support has a plurality of openings to access both of the green tape stacks. These openings are made by forming the openings in the metal support, filling them with a dielectric that has a thermal coefficient of expansion close to that of the metal support, forming an opening in the dielectric and filling the opening with a conductive ink.
    Type: Grant
    Filed: March 8, 1999
    Date of Patent: September 11, 2001
    Assignee: Sarnoff Corporation
    Inventors: Attiganal Narayanaswamy Sreeram, Ashok Narayan Prabhu, Leszek Hozer, Kalipada Palit
  • Patent number: 6168490
    Abstract: A plasma display having a transparent front panel spaced from a back panel which is a metal core having layers of a dielectric material extending over and bonded to the core. Conductive electrodes are on the surface of or imbedded in the dielectric layer of the back panel. The materials of which the back panel is made are chosen to form a back panel having a thermal coefficient of expansion compatible with that of the front panel. Barrier ribs are formed on the back panel by embossing the green tape before cofiring the bonded assembly. The green tape is embossed using pulsed pressure and an embossing tool that is formed by assembling embossing members and spacing members in compression. The embossing tool further includes elastic spacers mounted outside of the embossing tool and in a position such that the elastic spacers are held in compression during the embossing operation to aid in releasing the embossed green tape from the embossing tool after the embossing operation.
    Type: Grant
    Filed: June 1, 1998
    Date of Patent: January 2, 2001
    Assignees: Sarnoff Corporation, LG Electronics, Inc.
    Inventors: Leszek Hozer, Kalipada Palit, Attiganal Narayanaswamy Sreeram, Robert L. Quinn, Ashok Narayan Prabhu
  • Patent number: 6140759
    Abstract: A plasma display device having a composite back panel including a metal substrate having a predetermined thermal coefficient of expansion (TCE) and a ceramic barrier rib structure which are co-fired at a pre-determined temperature, the ceramic barrier rib structure is composed from a first glass material having a TCE which is less than the TCE of the metal substrate, the first glass formulated to flow-back at the co-firing temperature; and a second glass material having a TCE which is greater than the TCE of the metal substrate, wherein the first and the second glass materials are mixed in a proportion to produce a composite ceramic material having a TCE which is substantially equal to the TCE of the metal substrate. The plasma display device having the ceramic barrier rib structure composed of the first and second glasses provides control of the TCE to minimize stresses in the final produce and assure panel flatness.
    Type: Grant
    Filed: July 31, 1998
    Date of Patent: October 31, 2000
    Assignee: Sarnoff Corporation
    Inventors: Attiganal Narayanaswamy Sreeram, Ashok Narayan Prabhu, Les Hozer, Kalipada Palit