Patents by Inventor Subahu D. Desai

Subahu D. Desai 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: 7627947
    Abstract: A method of making a multilayered circuitized substrate in which a continuous process is used to form electrically conductive layers which each will form part of a sub-composite. The sub-composites are then aligned such that openings within the conductive layers are also aligned, the sub-composites are then bonded together, and a plurality of holes are then laser drilled through the entire thickness of the bonded structure. The dielectric layers used in the sub-composites do not include continuous or semi-continuous fibers therein, thus expediting hole formation there-through.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: December 8, 2009
    Assignee: Endicott Interconnect Technologies, Inc.
    Inventors: Thomas J. Davis, Subahu D. Desai, John M. Lauffer, James J. McNamara, Jr., Voya R. Markovich
  • Patent number: 7629559
    Abstract: A method of improving conductive paste connections in a circuitized substrate in which at least one and preferably a series of high voltage pulses are applied across the paste and at least one and preferably a series of high current pulses are applied, both series of pulses applied separately. The result is an increase in the number of conductive paths through the paste connections from those present prior to the pulse applications and a corresponding resistance reduction in said connections.
    Type: Grant
    Filed: December 19, 2005
    Date of Patent: December 8, 2009
    Assignee: Endicott Interconnect Technologies, Inc.
    Inventors: Subahu D. Desai, John M. Lauffer, How T. Lin, Voya R. Markovich, Ronald V. Smith
  • Patent number: 7326643
    Abstract: A method of making circuitized substrate comprised of at least one dielectric material having an electrically conductive pattern thereon. At least part of the pattern is used as the first layer of an organic memory device which further includes at least a second dielectric layer over the pattern and a second pattern aligned with respect to the lower part for achieving several points of contact to thus form the device.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: February 5, 2008
    Assignee: Endicott Interconnect Technologies, Inc.
    Inventors: Subahu D. Desai, How T. Lin, John M. Lauffer, Voya R. Markovich, David L. Thomas
  • Patent number: 7253502
    Abstract: A circuitized substrate comprised of at least one dielectric material having an electrically conductive pattern thereon. At least part of the pattern is used as the first layer of an organic memory device which further includes at least a second dielectric layer over the pattern and a second pattern aligned with respect to the lower part for achieving several points of contact to thus form the device. The substrate is preferably combined with other dielectric-circuit layered assemblies to form a multilayered substrate on which can be positioned discrete electronic components (e.g., a logic chip) coupled to the internal memory device to work in combination therewith. An electrical assembly capable of using the substrate is also provided, as is an information handling system adapted for using one or more such electrical assemblies as part thereof.
    Type: Grant
    Filed: July 28, 2004
    Date of Patent: August 7, 2007
    Assignee: Endicott Interconnect Technologies, Inc.
    Inventors: Subahu D. Desai, How T. Lin, John M. Lauffer, Voya R. Markovich, David L. Thomas
  • Patent number: 6740819
    Abstract: Via holes are formed in an electrically conductive power plane. Photo-imageable dielectric (PID) material is applied to one side of the power plane filling the via holes. The power plane side with no PID material is exposed to light energy to cure the PID material in the via holes. A developer is used to remove any uncured PID material. Signal plane assemblies comprising a conductive signal plane and a dielectric layer are laminated onto the filled power plane forming a two signal and one power plane (2S1P) structure. In another embodiment, the power plane has PID material applied from both sides. A photo-mask is applied to the power plane and the PID material in the via holes is cured with light energy. A developer is used to remove uncured PID material. Signal plane assemblies, as described above, are laminated onto the filled power plane forming a 2S1P structure.
    Type: Grant
    Filed: April 23, 2003
    Date of Patent: May 25, 2004
    Assignee: International Business Machines Corporation
    Inventors: Anilkumar C. Bhatt, Ashwinkumar C. Bhatt, Subahu D. Desai, John M. Lauffer, Voya R. Markovich, Thomas R. Miller
  • Publication number: 20030188890
    Abstract: Via holes are formed in an electrically conductive power plane. Photo-imageable dielectric (PID) material is applied to one side of the power plane filling the via holes. The power plane side with no PID material is exposed to light energy to cure the PID material in the via holes. A developer is used to remove any uncured PID material. Signal plane assemblies comprising a conductive signal plane and a dielectric layer are laminated onto the filled power plane forming a two signal and one power plane (2S1P) structure. In another embodiment, the power plane has PID material applied from both sides. A photo-mask is applied to the power plane and the PID material in the via holes is cured with light energy. A developer is used to remove uncured PID material. Signal plane assemblies, as described above, are laminated onto the filled power plane forming a 2S1P structure.
    Type: Application
    Filed: April 23, 2003
    Publication date: October 9, 2003
    Applicant: IBM Corporation
    Inventors: Anilkumar C. Bhatt, Ashwinkumar C. Bhatt, Subahu D. Desai, John M. Lauffer, Voya R. Markovich, Thomas R. Miller
  • Patent number: 6608757
    Abstract: Via holes are formed in an electrically conductive power plane. Photo-imageable dielectric (PID) material is applied to one side of the power plane filling the via holes. The power plane side with no PID material is exposed to light energy to cure the PID material in the via holes. A developer is used to remove any uncured PID material. Signal plane assemblies comprising a conductive signal plane and a dielectric layer are laminated onto the filled power plane forming a two signal and one power plane (2S1P) structure. In another embodiment, the power plane has PID material applied from both sides. A photo-mask is applied to the power plane and the PID material in the via holes is cured with light energy. A developer is used to remove uncured PID material. Signal plane assemblies, as described above, are laminated onto the filled power plane forming a 2S1P structure.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: August 19, 2003
    Assignee: International Business Machines Corporation
    Inventors: Anilkumar C. Bhatt, Ashwinkumar C. Bhatt, Subahu D. Desai, John M. Lauffer, Voya R. Markovich, Thomas R. Miller
  • Patent number: 5546321
    Abstract: Disclosed is a design tool and a method of fabricating a multi-layer printed circuit board. The method utilizes the design tool. The knowledge base means has both (1) printed circuit board cross sectional geometric parameter to transmission line parameter data and (2) "IF . . . THEN . . . " production rules for lamination, registration, circuitization, testability, test tools, and test procedures. These tools relate to manufacturability, cost, test development, second level packaging and printed circuit board. The printed circuit board begins with the user entering the printed circuit board design parameters and performance parameters into the input/output interface. Next, the knowledge base production rules are applied to the printed circuit board design and performance parameters to generate a set of cross section designs meeting the user specified parameters. The printed circuit board is then built up in accordance with one of the generated cross section designs.
    Type: Grant
    Filed: August 23, 1995
    Date of Patent: August 13, 1996
    Assignee: International Business Machines Corporation
    Inventors: Chi S. Chang, Subahu D. Desai, Debra A. Gernhart, Phillip A. Hartley, Robert J. Haskins, Jr., Keith K. T. Ho, Robert A. Martone, Roy T. Mulcahy, Louis J. Shaffer, Robert D. Schoening, Scott A. Versprille
  • Patent number: 5519633
    Abstract: Disclosed is a design tool and a method of fabricating a multi-layer printed circuit board. The method utilizes the design tool. The knowledge base means has both (1) printed circuit board cross sectional geometric parameter to transmission line parameter data and (2) "IF . . . THEN . . . " production rules for lamination, registration, circuitization, testability, test tools, and test procedures. These tools relate to manufacturability, cost, test development, second level packaging and printed circuit board. The printed circuit board begins with the user entering the printed circuit board design parameters and performance parameters into the input/output interface. Next, the knowledge base production rules are applied to the printed circuit board design and performance parameters to generate a set of cross section designs meeting the user specified parameters. The printed circuit board is then built up in accordance with one of the generated cross section designs.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: May 21, 1996
    Assignee: International Business Machines Corporation
    Inventors: Chi S. Chang, Subahu D. Desai, Debra A. Gernhart, Phillip A. Hartley, Robert J. Haskins, Jr., Keith K. T. Ho, Robert A. Martone, Roy T. Mulcahy, Louis J. Shaffer, Robert D. Schoening, Scott A. Versprille