Patents by Inventor Sriram Muthukumar

Sriram Muthukumar 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: 8502400
    Abstract: A dam stiffener for a package substrate is presented. In an embodiment, the dam stiffener comprises a thermally curable polymer, and is simultaneously cured with the underfill material to act as stiffener to the substrate. In another embodiment, a curable reservoir material can be dispensed to fill the space between the integrated circuit die and the dam stiffener, forming a thick reservoir layer, acting as an additional stiffener for the package substrate.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: August 6, 2013
    Assignee: Intel Corporation
    Inventors: Prasanna Karpur, Sriram Muthukumar
  • Publication number: 20130127054
    Abstract: A stacked-chip apparatus includes a package substrate and an interposer with a chip stack disposed with a standoff that matches the interposer. A package-on-package stacked-chip apparatus includes a top package disposed on the interposer.
    Type: Application
    Filed: January 14, 2013
    Publication date: May 23, 2013
    Inventors: Sriram MUTHUKUMAR, Charles A. GEALER
  • Patent number: 8387240
    Abstract: In one embodiment, a method includes forming a plurality of vias partially through a body, the vias including sidewalls defined by the body. An electrically insulating layer is formed on the sidewalls and on an upper surface of the body. An electrically conductive layer is formed on the insulating layer in the vias and on the upper surface, the electrically conductive layer defining first metal pads on the upper surface and second metal pads in contact with the first metal pads, the second metal pads having a denser pitch than the first metal pads. A dielectric layer is formed between adjacent first metal pads and between adjacent second metal pads. The body is thinned through a lower surface and the electrically insulating layer in the vias is exposed. After the thinning, a portion of the electrically insulating layer in the, vias is removed. The body is coupled to a substrate.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: March 5, 2013
    Assignee: Intel Corporation
    Inventors: Sriram Muthukumar, Raul Mancera, Yoshihiro Tomita, Chi-won Hwang
  • Publication number: 20120187583
    Abstract: A dam stiffener for a package substrate is presented. In an embodiment, the dam stiffener comprises a thermally curable polymer, and is simultaneously cured with the underfill material to act as stiffener to the substrate. In another embodiment, a curable reservoir material can be dispensed to fill the space between the integrated circuit die and the dam stiffener, forming a thick reservoir layer, acting as an additional stiffener for the package substrate.
    Type: Application
    Filed: March 6, 2012
    Publication date: July 26, 2012
    Applicant: Intel Corporation
    Inventors: Prasanna Karpur, Sriram Muthukumar
  • Patent number: 8143110
    Abstract: A dam stiffener for a package substrate is presented. In an embodiment, the dam stiffener comprises a thermally curable polymer, and is simultaneously cured with the underfill material to act as stiffener to the substrate. In another embodiment, a curable reservoir material can be dispensed to fill the space between the integrated circuit die and the dam stiffener, forming a thick reservoir layer, acting as an additional stiffener for the package substrate.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: March 27, 2012
    Assignee: Intel Corporation
    Inventors: Prasanna Karpur, Sriram Muthukumar
  • Patent number: 8030782
    Abstract: Embodiments of the invention provide a first component with a compliant interconnect bonded to a second component with a land pad by a metal to metal bond. In some embodiments, the first component may be a microprocessor die and the second component a package substrate.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: October 4, 2011
    Assignee: Intel Corporation
    Inventors: Shriram Ramanathan, Sriram Muthukumar
  • Publication number: 20110147912
    Abstract: A dam stiffener for a package substrate is presented. In an embodiment, the dam stiffener comprises a thermally curable polymer, and is simultaneously cured with the underfill material to act as stiffener to the substrate. In another embodiment, a curable reservoir material can be dispensed to fill the space between the integrated circuit die and the dam stiffener, forming a thick reservoir layer, acting as an additional stiffener for the package substrate.
    Type: Application
    Filed: December 23, 2009
    Publication date: June 23, 2011
    Inventors: Prasanna Karpur, Sriram Muthukumar
  • Publication number: 20110067236
    Abstract: The formation of electronic assemblies, including assemblies having an interposer, are described. In one embodiment, a method includes forming a plurality of vias extending partially through a body, the vias including sidewalls defined by the body. An insulating layer is formed on the sidewalls and on an upper surface of the body. An electrically conductive layer is formed on the insulating layer in the vias and on the upper surface of the body, the electrically conductive layer defining a first metal pad layer on the upper surface and a second metal pad layer in contact with the first metal pad layer, the second metal pad layer having a denser pitch between adjacent pads than the first metal pad layer. The method also includes forming a dielectric layer between the adjacent metal pads in the first and second pad layers. The method also includes coupling a plurality of elements to the second metal pad layer.
    Type: Application
    Filed: November 29, 2010
    Publication date: March 24, 2011
    Inventors: Sriram MUTHUKUMAR, Raul MANCERA, Yoshihiro TOMITA, Chi-won HWANG
  • Patent number: 7882628
    Abstract: The formation of electronic assemblies is described. One embodiment includes providing a body and forming a first metal pad layer on a first surface thereof. A second metal pad layer is formed in contact with the first metal pad layer, the second metal pad layer having a denser pitch than the first metal pad layer. A dielectric layer is formed between the metal pads in the first and second metal pad layers. Vias extending through the body from a second surface thereof are formed, the vias exposing the first metal pad layer. An insulating layer is formed on via sidewalls and on the second surface, and an electrically conductive layer formed on the insulating layer and on the exposed surface of the first metal layer. Elements are coupled to the second metal pad layer and the electrically conductive layer coupled to a substrate. Other embodiments are described and claimed.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: February 8, 2011
    Assignee: Intel Corporation
    Inventors: Sriram Muthukumar, Raul Mancera, Yoshihiro Tomita, Chi-won Hwang
  • Publication number: 20100327419
    Abstract: A stacked-chip apparatus includes a package substrate and an interposer with a chip stack disposed with a standoff that matches the interposer. A package-on-package stacked-chip apparatus includes a top package disposed on the interposer.
    Type: Application
    Filed: June 26, 2009
    Publication date: December 30, 2010
    Inventors: Sriram Muthukumar, Charles A. Gealer
  • Patent number: 7851269
    Abstract: Embodiments of the present invention relate to a method of stiffening a semiconductor coreless package substrate to improve rigidity and resistance against warpage. An embodiment of the method comprises disposing a sacrificial mask on a plurality of contact pads on a second level interconnect (package-to-board interconnect) side of a coreless package substrate, forming a molded stiffener around the sacrificial mask without increasing the effective thickness of the substrate, and removing the sacrificial mask to form a plurality of cavities in the molded stiffener corresponding to the contact pads. Embodiments also include plating the surface of the contact pads and the sidewalls of the cavities in the molded cavities with an electrically conductive material.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: December 14, 2010
    Assignee: Intel Corporation
    Inventors: Sriram Muthukumar, Nicholas R. Watts, John S. Guzek
  • Publication number: 20100301492
    Abstract: Embodiments of the present invention relate to a method of stiffening a semiconductor coreless package substrate to improve rigidity and resistance against warpage. An embodiment of the method comprises disposing a sacrificial mask on a plurality of contact pads on a second level interconnect (package-to-board interconnect) side of a coreless package substrate, forming a molded stiffener around the sacrificial mask without increasing the effective thickness of the substrate, and removing the sacrificial mask to form a plurality of cavities in the molded stiffener corresponding to the contact pads. Embodiments also include plating the surface of the contact pads and the sidewalls of the cavities in the molded cavities with an electrically conductive material.
    Type: Application
    Filed: August 16, 2010
    Publication date: December 2, 2010
    Inventors: Sriram Muthukumar, Nicholas R. Watts, John S. Guzek
  • Patent number: 7841080
    Abstract: One embodiment relates to forming a plurality of vias extending partially through a body, the vias including sidewalls defined by the body. An insulating layer is formed on the sidewalls and on an upper surface of the body. An electrically conductive layer is formed on the insulating layer, the electrically conductive layer defining first metal pads on the upper surface and second metal pads in contact with the first metal pads, the second metal pads having a denser pitch than the first metal pads. A dielectric layer is formed between adjacent first metal pads and between adjacent second metal pads. A plurality of electronic elements are coupled to the second metal pads. After the coupling the elements, the body is thinned through a lower surface. A portion of the insulating layer in the vias is removed and the electrically conductive layer is coupled to a substrate.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: November 30, 2010
    Assignee: Intel Corporation
    Inventors: Sriram Muthukumar, Raul Mancera, Yoshihiro Tomita, Chi-won Hwang
  • Publication number: 20100237505
    Abstract: Embodiments of the invention provide a first component with a compliant interconnect bonded to a second component with a land pad by a metal to metal bond. In some embodiments, the first component may be a microprocessor die and the second component a package substrate.
    Type: Application
    Filed: May 28, 2010
    Publication date: September 23, 2010
    Inventors: Sriram Muthukumar, Shriram Ramanathan
  • Patent number: 7800402
    Abstract: A programmable logic device integrated circuit or other integrated circuit may have logic circuitry that produces data signals. The data signals may be routed to other logic circuits through interconnects. The interconnects may be programmable. A level recovery circuit may be used at the end of each interconnect line to strengthen the transmitted data signal. The level recovery circuit that is attached to a given interconnect line may produce true and complementary versions of the data signal that is on that interconnect line. Level shifting circuitry may be provided to boost the data signals on the interconnects. Each interconnect line may have a level shifter circuit that receives the true and complementary versions of a data signal and that produces corresponding boosted true and complementary versions of the data signal. The boosted signals may be provided to the control inputs of complementary-metal-oxide-semiconductor transistor pass gates in programmable look-up table circuitry.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: September 21, 2010
    Assignee: Altera Corporation
    Inventors: Irfan Rahim, Sriram Muthukumar, William Bradley Vest, Myron Wai Wong
  • Publication number: 20100207265
    Abstract: Embodiments of the present invention relate to a method of stiffening a semiconductor coreless package substrate to improve rigidity and resistance against warpage. An embodiment of the method comprises disposing a sacrificial mask on a plurality of contact pads on a second level interconnect (package-to-board interconnect) side of a coreless package substrate, forming a molded stiffener around the sacrificial mask without increasing the effective thickness of the substrate, and removing the sacrificial mask to form a plurality of cavities in the molded stiffener corresponding to the contact pads. Embodiments also include plating the surface of the contact pads and the sidewalls of the cavities in the molded cavities with an electrically conductive material.
    Type: Application
    Filed: February 19, 2009
    Publication date: August 19, 2010
    Inventors: Sriram Muthukumar, Nicholas R. Watts, John S. Guzek
  • Patent number: 7750487
    Abstract: Embodiments of the invention provide a first component with a compliant interconnect bonded to a second component with a land pad by a metal to metal bond. In some embodiments, the first component may be a microprocessor die and the second component a package substrate.
    Type: Grant
    Filed: August 11, 2004
    Date of Patent: July 6, 2010
    Assignee: Intel Corporation
    Inventors: Sriram Muthukumar, Shriram Ramanathan
  • Patent number: 7589424
    Abstract: Embodiments of the invention provide a device with a die and a substrate having a similar coefficient of thermal expansion to that of the die. The substrate may comprise a silicon base layer. Build up layers may be formed on the side of the base layer further from the die.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: September 15, 2009
    Assignee: Intel Corporation
    Inventors: Sriram Muthukumar, Devendra Natekar
  • Publication number: 20080303159
    Abstract: Embodiments of the invention provide a device with a die and a substrate having a similar coefficient of thermal expansion to that of the die. The substrate may comprise a silicon base layer. Build up layers may be formed on the side of the base layer further from the die.
    Type: Application
    Filed: August 8, 2008
    Publication date: December 11, 2008
    Inventors: Sriram Muthukumar, Devendra Natekar
  • Publication number: 20080295325
    Abstract: The formation of electronic assemblies, including assemblies having an interposer, are described. In one embodiment, a method includes forming a plurality of vias extending partially through a body, the vias including sidewalls defined by the body. An insulating layer is formed on the sidewalls and on an upper surface of the body. An electrically conductive layer is formed on the insulating layer in the vias and on the upper surface of the body, the electrically conductive layer defining a first metal pad layer on the upper surface and a second metal pad layer in contact with the first metal pad layer, the second metal pad layer having a denser pitch between adjacent pads than the first metal pad layer. The method also includes forming a dielectric layer between the adjacent metal pads in the first and second pad layers. The method also includes coupling a plurality of elements to the second metal pad layer.
    Type: Application
    Filed: May 30, 2007
    Publication date: December 4, 2008
    Inventors: Sriram Muthukumar, Raul Mancera, Yoshihiro Tomita, Chi-won Hwang