Patents by Inventor Tarak A. Railkar

Tarak A. Railkar 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: 8946904
    Abstract: A substrate comprising a plurality of layers, a first side and a second side; and a via extending through the substrate from the first side to the second side. The via comprises:a first substrate via extending through a first layer of the plurality of layers, the first substrate via having a first cross-sectional area; a first capture pad disposed under the first substrate via, wherein the first capture pad physically contacts the first substrate via; a second substrate via extending through a second layer of the plurality of layers, the second substrate via physically contacting the first capture pad, the second substrate via having a second cross-sectional area that is greater than the first cross-sectional area; and a second thermal and electrical contact pad disposed under the second dielectric layer, wherein the second contact pad physically contacts the second substrate via.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: February 3, 2015
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Tarak A. Railkar, Ashish Alawani, Ray Parkhurst
  • Patent number: 8946894
    Abstract: Methods and apparatuses for forming a package for high-power semiconductor devices are disclosed herein. A package may include a plurality of distinct thermal spreader layers disposed between a die and a metal carrier. Other embodiments are described and claimed.
    Type: Grant
    Filed: February 18, 2013
    Date of Patent: February 3, 2015
    Assignee: TriQuint Semiconductor, Inc.
    Inventors: Tarak A. Railkar, Deep C. Dumka
  • Patent number: 8921995
    Abstract: An integrated circuit (IC) package is disclosed comprising a substrate including a plurality of substrate contacts; a semiconductor die including a plurality of die contacts; and a plurality of conductors for providing direct connections between substrate contacts and die contacts, respectively. By having the conductors directly route the connections between the die contacts and substrate contacts, many improvements may be realized including, but not limited to, improved package routing capabilities, reduced die and/or package size, improved package reliability, improved current handling capacity, improved speed, improved thermal performance, and lower costs.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: December 30, 2014
    Assignee: Maxim Intergrated Products, Inc.
    Inventors: Tarak A. Railkar, Steven D. Cate
  • Patent number: 8908383
    Abstract: Embodiments of the present disclosure describe apparatuses, methods, and systems of thermal via structures with surface features. In some embodiments the surface features may have dimensions greater than approximately one micron. The thermal via structures may be incorporated into a substrate of an integrated circuit device. Other embodiments may be described and/or claimed.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: December 9, 2014
    Assignee: TriQuint Semiconductor, Inc.
    Inventors: Tarak A. Railkar, Paul D. Bantz
  • Patent number: 8314472
    Abstract: A semiconductor structure comprises a substrate and a metal layer disposed over the substrate. The metal layer comprises a first electrical trace and a second electrical trace. The semiconductor structure comprises a conductive pillar disposed directly on and in electrical contact with the first electrical trace; and a dielectric layer selectively disposed between the metal layer and the conductive pillar. The dielectric layer electrically isolates the second electrical trace from the pillar.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: November 20, 2012
    Assignee: Avago Technologies Wireless IP (Singapore) Pte. Ltd.
    Inventors: Ray Parkhurst, Tarak Railkar, William Snodgrass
  • Patent number: 8304293
    Abstract: Disclosed are systems and methods for improving the thermal performance of integrated circuit packages. Aspects of the present invention include improved thermal package structures and methods for producing the same through the application of one or more thermal spreaders in the package. In embodiments, a thermal spreader is incorporated in a semiconductor chip package between a semiconductor die and its die pad. By including a thermal spreader in an IC package, the package can handle higher levels of power while maintaining approximately the same temperature of the package or can reduce the temperature of the package when operating at the same power level, as compared to a package without a thermal spreader.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: November 6, 2012
    Assignee: Maxim Integrated, Inc.
    Inventors: Tarak A. Railkar, Steven D. Cate
  • Publication number: 20120049345
    Abstract: A substrate comprising a plurality of layers, a first side and a second side; and a via extending through the substrate from the first side to the second side. The via comprises: a first substrate via extending through a first layer of the plurality of layers, the first substrate via having a first cross-sectional area; a first capture pad disposed under the first substrate via, wherein the first capture pad physically contacts the first substrate via; a second substrate via extending through a second layer of the plurality of layers, the second substrate via physically contacting the first capture pad, the second substrate via having a second cross-sectional area that is greater than the first cross-sectional area; and a second thermal and electrical contact pad disposed under the second dielectric layer, wherein the second contact pad physically contacts the second substrate via.
    Type: Application
    Filed: August 27, 2010
    Publication date: March 1, 2012
    Applicant: Avago Technologies Wireless IP (Singapore) Pte. Ltd.
    Inventors: Tarak A. Railkar, Ashish Alawani, Ray Parkhurst
  • Publication number: 20120025269
    Abstract: A semiconductor structure comprises a substrate and a metal layer disposed over the substrate. The metal layer comprises a first electrical trace and a second electrical trace. The semiconductor structure comprises a conductive pillar disposed directly on and in electrical contact with the first electrical trace; and a dielectric layer selectively disposed between the metal layer and the conductive pillar. The dielectric layer electrically isolates the second electrical trace from the pillar.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 2, 2012
    Applicant: Avago Technologies Wireless IP (Singapore) Pte. Ltd.
    Inventors: Ray Parkhurst, Tarak Railkar, William Snodgrass
  • Patent number: 8097963
    Abstract: An IC package including one or more z-axis interconnects for performing at least in part the fan-in/fan out interconnection for electrically coupling contacts of semiconductor die to external contacts of the package. The z-axis interconnect comprises a matrix of electrically conducting elements extending from the top to the bottom surface of the interconnect. Each conductive element is internally insulated from other conductive elements of the matrix. The semiconductor contacts may be electrically coupled to separate portions of the matrix by way of electrical connections to the top of the z-axis interconnect. Similarly, the external contacts of the package may be electrically coupled to the same separate portions of the matrix by way electrical connections to the bottom of the interconnect. The z-axis interconnect improves the miniaturization, integration, thermal and electrical performance of IC packages.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: January 17, 2012
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Steven D. Cate, Ajay K. Ghai, Tarak A. Railkar
  • Publication number: 20120003794
    Abstract: Disclosed are systems and methods for improving the thermal performance of integrated circuit packages. Aspects of the present invention include improved thermal package structures and methods for producing the same through the application of one or more thermal spreaders in the package. In embodiments, a thermal spreader is incorporated in a semiconductor chip package between a semiconductor die and its die pad. By including a thermal spreader in an IC package, the package can handle higher levels of power while maintaining approximately the same temperature of the package or can reduce the temperature of the package when operating at the same power level, as compared to a package without a thermal spreader.
    Type: Application
    Filed: September 12, 2011
    Publication date: January 5, 2012
    Inventors: Tarak A. Railkar, Steven D. Cate
  • Patent number: 8018051
    Abstract: Disclosed are systems and methods for improving the thermal performance of integrated circuit packages. Aspects of the present invention include improved thermal package structures and methods for producing the same through the application of one or more thermal spreaders in the package. In embodiments, a thermal spreader is incorporated in a semiconductor chip package between a semiconductor die and its die pad. By including a thermal spreader in an IC package, the package can handle higher levels of power while maintaining approximately the same temperature of the package or can reduce the temperature of the package when operating at the same power level, as compared to a package without a thermal spreader.
    Type: Grant
    Filed: February 2, 2009
    Date of Patent: September 13, 2011
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Tarak A. Railkar, Steven D. Cate
  • Patent number: 7982305
    Abstract: An integrated circuit (IC) package is disclosed comprising a substrate including a plurality of substrate contacts; a semiconductor die including a plurality of die contacts; and a plurality of conductors for providing direct connections between substrate contacts and die contacts, respectively. By having the conductors directly route the connections between the die contacts and substrate contacts, many improvements may be realized including, but not limited to, improved package routing capabilities, reduced die and/or package size, improved package reliability, improved current handling capacity, improved speed, improved thermal performance, and lower costs.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: July 19, 2011
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Tarak A. Railkar, Steven D. Cate
  • Publication number: 20100193942
    Abstract: Disclosed are systems and methods for improving the thermal performance of integrated circuit packages. Aspects of the present invention include improved thermal package structures and methods for producing the same through the application of one or more thermal spreaders in the package. In embodiments, a thermal spreader is incorporated in a semiconductor chip package between a semiconductor die and its die pad. By including a thermal spreader in an IC package, the package can handle higher levels of power while maintaining approximately the same temperature of the package or can reduce the temperature of the package when operating at the same power level, as compared to a package without a thermal spreader.
    Type: Application
    Filed: February 2, 2009
    Publication date: August 5, 2010
    Inventors: Tarak A. Railkar, Steven D. Cate
  • Patent number: 7112545
    Abstract: The surface of a semiconductor material, e.g., gallium arsenide, is passivated by irradiating the surface with ultra-short laser pulses, until a stable passive surface is achieved. The passive surface so prepared is devoid of a superficial oxide layer.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: September 26, 2006
    Assignee: The Board of Trustees of the University of Arkansas
    Inventors: Tarak A. Railkar, Ajay P. Malshe, William D. Brown