Patents by Inventor Lavakumar Ranganathan

Lavakumar Ranganathan 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: 10605859
    Abstract: A MOS IC includes a first standard cell including first and second power rails, first and second active regions, and a plurality of metal interconnects. The first power rail extends in a first direction and provides a first voltage to the first standard cell. The second power rail extends in the first direction and provides a second voltage to the first standard cell. The first active region is between the first and second power rails on a first side of the first standard cell. The second active region is between the first and second power rails on a second side of the first standard cell. The second active region is separated from the first active region. The plurality of metal interconnects extend in a second direction between the first and second active regions and between the first and second power rails. The second direction is orthogonal to the first direction.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: March 31, 2020
    Assignee: QUALCOMM Incorporated
    Inventors: Rami Salem, Lesly Zaren V. Endrinal, Hyeokjin Lim, Hadi Bunnalim, Robert Kim, Lavakumar Ranganathan, Mickael Malabry
  • Patent number: 10324131
    Abstract: The present disclosure provide techniques for semiconductor testing, and more particularly, to systems and methods for laser-based fault isolation and design for testability (DFT) diagnosis techniques. In one embodiment, an integrated chip (IC) testing apparatus, includes an input pin; a decompressor connected to the input pin; a plurality of scan chains, each scan chain of the plurality of scan chains comprising a plurality of scan cells; a plurality of scan chain control elements, each scan chain control element of the plurality of scan chain control elements being connected between the decompressor and a respective scan chain of the plurality of scan chains, wherein each scan chain control element is configured to enable or disable test data from flowing from the compressor to the respective scan chain; a compressor connected to an output of each scan chain of the plurality of scan chains; and an output pin connected to the compressor.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: June 18, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Lesly Endrinal, Rakesh Kinger, Joseph Fang, Srinivas Patil, Lavakumar Ranganathan, Chia-Ying Chen
  • Publication number: 20190115301
    Abstract: A metal oxide semiconductor (MOS) integrated circuit (IC) has a plurality of fiducial standard cells of different cell sizes. The different cell sizes are non-equally utilized. The plurality of fiducial standard cells are placed to have a random offset from a uniform global placement pattern. Each of the fiducial standard cells has at least four power rails and various sets of active regions. The power rails extend in a first direction. The active regions are provided adjacent to the power rails but are disconnected from contacts and interconnects and thus do not draw power from the power rails. Instead, the active regions are disjoint and collinear thereby creating islands of active regions among spacings of inactive regions. These inactive regions more easily allow electromagnetic radiation to pass through thereby allowing the MOS fiducial standard cell to be visible for a CAD-to-silicon backside image alignment even with 7 nm feature sizes.
    Type: Application
    Filed: March 6, 2018
    Publication date: April 18, 2019
    Inventors: Michael Duane ALSTON, Hadi BUNNALIM, Lesly Zaren Venturina ENDRINAL, Mickael Sebastien Alain MALABRY, Lavakumar RANGANATHAN, Rami Fathy Amin Gomaa SALEM
  • Patent number: 10262950
    Abstract: A metal oxide semiconductor (MOS) integrated circuit (IC) has a plurality of fiducial standard cells of different cell sizes. The different cell sizes are non-equally utilized. The plurality of fiducial standard cells are placed to have a random offset from a uniform global placement pattern. Each of the fiducial standard cells has at least four power rails and various sets of active regions. The power rails extend in a first direction. The active regions are provided adjacent to the power rails but are disconnected from contacts and interconnects and thus do not draw power from the power rails. Instead, the active regions are disjoint and collinear thereby creating islands of active regions among spacings of inactive regions. These inactive regions more easily allow electromagnetic radiation to pass through thereby allowing the MOS fiducial standard cell to be visible for a CAD-to-silicon backside image alignment even with 7 nm feature sizes.
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: April 16, 2019
    Assignee: QUALCOMM Incorporated
    Inventors: Michael Duane Alston, Hadi Bunnalim, Lesly Zaren Venturina Endrinal, Mickael Sebastien Alain Malabry, Lavakumar Ranganathan, Rami Fathy Amin Gomaa Salem
  • Publication number: 20180074117
    Abstract: A MOS IC includes a first standard cell including first and second power rails, first and second active regions, and a plurality of metal interconnects. The first power rail extends in a first direction and provides a first voltage to the first standard cell. The second power rail extends in the first direction and provides a second voltage to the first standard cell. The first active region is between the first and second power rails on a first side of the first standard cell. The second active region is between the first and second power rails on a second side of the first standard cell. The second active region is separated from the first active region. The plurality of metal interconnects extend in a second direction between the first and second active regions and between the first and second power rails. The second direction is orthogonal to the first direction.
    Type: Application
    Filed: September 14, 2016
    Publication date: March 15, 2018
    Inventors: Rami SALEM, Lesly Zaren V. ENDRINAL, Hyeokjin LIM, Hadi BUNNALIM, Robert KIM, Lavakumar RANGANATHAN, Mickael MALABRY
  • Patent number: 9599666
    Abstract: A method and apparatus for mapping an electronic device. The electronic device is loaded into a test fixture, which may be an automated test equipment (ATE). A laser beam is stepped across locations of interest. At each location of interest a minimum voltage and/or maximum frequency are computed. A contour map of the changes in minimum voltage and maximum frequency across a field of view of the electronic device is generated. Additional embodiments provide signaling a laser scan module during the rising edge of a synchronization pulse to indicate that minimum voltage (Vmin) and maximum frequency (Fmax) specification search data is provided to a laser voltage probe. A Vmin/Fmax module compares the specification search data with the data read from the laser voltage probe and computes a parameter shift value. The laser beam is moved to another location when the falling edge of the synchronization pulse occurs.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: March 21, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: Lavakumar Ranganathan, Martin Villafana, Lesly Zaren Venturina Endrinal
  • Publication number: 20160116531
    Abstract: A method and apparatus for mapping an electronic device. The electronic device is loaded into a test fixture, which may be an automated test equipment (ATE). A laser beam is stepped across locations of interest. At each location of interest a minimum voltage and/or maximum frequency are computed. A contour map of the changes in minimum voltage and maximum frequency across a field of view of the electronic device is generated. Additional embodiments provide signaling a laser scan module during the rising edge of a synchronization pulse to indicate that minimum voltage (Vmin) and maximum frequency (Fmax) specification search data is provided to a laser voltage probe. A Vmin/Fmax module compares the specification search data with the data read from the laser voltage probe and computes a parameter shift value. The laser beam is moved to another location when the falling edge of the synchronization pulse occurs.
    Type: Application
    Filed: October 28, 2014
    Publication date: April 28, 2016
    Inventors: Lavakumar Ranganathan, Martin Villafana, Lesly Zaren Venturina Endrinal
  • Publication number: 20150380325
    Abstract: An integrated circuit device includes an active silicon layer, and at least one passive metal layer placed in an input region and an output region of the device. The at least one passive metal layer has a surface area and thickness for at least one of the input region or the output region to provide a phase shift of an optical laser, the phase shift corresponding to an optimized visibility of the optical laser during an optic failure analysis of the device.
    Type: Application
    Filed: June 25, 2014
    Publication date: December 31, 2015
    Inventors: Ulrike KINDEREIT, Lavakumar RANGANATHAN
  • Publication number: 20120212245
    Abstract: An integrated circuit is disclosed. The integrated circuit includes an insulating material layer. The integrated circuit also includes a metal structure. Furthermore, the integrated circuit includes a via through the insulating material layer that is coupled to the metal structure for testing insulating material by applying dynamic voltage switching to two adjacent metal components of the metal structure.
    Type: Application
    Filed: February 1, 2012
    Publication date: August 23, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Angelo Pinto, Martin L. Villafana, You-Wen Yau, Homyar C. Mogul, Lavakumar Ranganathan, Rohan V. Gupte, Weijia Qi, Kent J. Pingrey, Carlos P. Aguilar, Paul J. Giotta, Leon Y. Leung, Jina M. Antosz, Bhupen M. Shah, Choh fei Yeap, Michael J. Campbell, Lawrence A. Elugbadebo, Allen A.B. Hogan