Patents by Inventor Anant Kumar

Anant Kumar 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).

  • Publication number: 20150084062
    Abstract: A vertical field-effect transistor (FET) device includes a monolithically integrated bypass diode connected between a source contact and a drain contact of the vertical FET device. According to one embodiment, the vertical FET device includes a pair of junction implants separated by a junction field-effect transistor (JFET) region. At least one of the junction implants of the vertical FET device includes a deep well region that is shared with the integrated bypass diode, such that the shared deep well region functions as both a source junction in the vertical FET device and a junction barrier region in the integrated bypass diode. The vertical FET device and the integrated bypass diode may include a substrate, a drift layer over the substrate, and a spreading layer over the drift layer, such that the junction implants of the vertical FET device are formed in the spreading layer.
    Type: Application
    Filed: April 17, 2014
    Publication date: March 26, 2015
    Applicant: Cree, Inc.
    Inventors: Vipindas Pala, Lin Cheng, Anant Kumar Agarwal, John Williams Palmour, Edward Robert Van Brunt
  • Publication number: 20150048489
    Abstract: Embodiments of a semiconductor die having a semiconductor device implemented on the semiconductor die and an edge termination structure around a periphery of the semiconductor device and methods of fabricating the same are disclosed. In one embodiment, a semiconductor die includes a semiconductor device and an edge termination structure around a periphery of the semiconductor device, where the edge termination structure includes negative features (e.g., trenches and/or divots) that vary dose in a corresponding edge termination region to approximate a desired dose profile. In one embodiment, the desired dose profile is a substantially decreasing or substantially linearly decreasing dose from an edge of a main junction of the semiconductor device to an edge of the edge termination region. In this manner, electric field crowding at the edge of the main junction of the semiconductor device is substantially reduced, which in turn substantially improves a break-down voltage of the semiconductor device.
    Type: Application
    Filed: August 16, 2013
    Publication date: February 19, 2015
    Applicant: Cree, Inc.
    Inventors: Edward Robert Van Brunt, Vipindas Pala, Lin Cheng, Anant Kumar Agarwal
  • Publication number: 20150041886
    Abstract: A power metal-oxide-semiconductor field-effect transistor (MOSFET) includes a substrate, a drift layer over the substrate, and a spreading layer over the drift layer. The spreading layer includes a pair of junction implants separated by a junction gate field effect (JFET) region. A gate oxide layer is on top of the spreading layer. The gate contact is on top of the gate oxide layer. Each one of the source contacts are on a portion of the spreading layer separate from the gate oxide layer and the gate contact. The drain contact is on the surface of the substrate opposite the drift layer.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 12, 2015
    Applicant: Cree, Inc.
    Inventors: Vipindas Pala, Anant Kumar Agarwal, Lin Cheng, Daniel Jenner Lichtenwalner, John Williams Palmour
  • Publication number: 20150021623
    Abstract: The present disclosure relates to a silicon carbide (SiC) field effect device that has a gate assembly formed in a trench. The gate assembly includes a gate dielectric that is an dielectric layer, which is deposited along the inside surface of the trench and a gate dielectric formed over the gate dielectric. The trench extends into the body of the device from a top surface and has a bottom and side walls that extend from the top surface of the body to the bottom of the trench. The thickness of the dielectric layer on the bottom of the trench is approximately equal to or greater than the thickness of the dielectric layer on the side walls of the trench.
    Type: Application
    Filed: July 17, 2013
    Publication date: January 22, 2015
    Inventors: Daniel Jenner Lichtenwalner, Lin Cheng, Anant Kumar Agarwal, John Williams Palmour
  • Publication number: 20150021742
    Abstract: Methods of forming a power semiconductor device having an edge termination are provided in which the power semiconductor device that has a drift region of a first conductivity type is formed on a substrate. A junction termination extension is formed on the substrate adjacent the power semiconductor device, the junction termination extension including a plurality of junction termination zones that are doped with dopants having a second conductivity type. The junction termination zones have different effective doping concentrations. A dopant activation process is performed to activate at least some of the dopants in the junction termination zones. An electrical characteristic of the power semiconductor device is measured. Then, the junction termination extension is etched in order to reduce the effective doping concentration within the junction termination extension.
    Type: Application
    Filed: July 19, 2013
    Publication date: January 22, 2015
    Inventors: Edward Robert Van Brunt, Vipindas Pala, Lin Cheng, Anant Kumar Agarwal
  • Patent number: 8926682
    Abstract: A system for treating an aneurysm comprises an elongate flexible shaft and an expandable member. An expandable scaffold is disposed over the expandable member and may be expanded from a collapsed configuration to an expanded configuration. A double-walled filling structure is disposed over the scaffold and has an outer wall and an inner wall. The filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a substantially tubular lumen to provide a path for blood flow. In the expanded configuration the scaffold engages the inner wall of the filling structure. A tether is releasably coupled with the filling structure and the flexible shaft thereby constraining axial movement of the structures relative to each other.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: January 6, 2015
    Assignee: Nellix, Inc.
    Inventors: Steven L. Herbowy, Michael A. Evans, Anant Kumar, K. T. Venkateswara Rao, Matthew R. Hellewell, Gil Laroya
  • Publication number: 20140145213
    Abstract: The present disclosure generally relates to a Schottky diode that has a substrate, a drift layer provided over the substrate, and a Schottky layer provided over an active region of the drift layer. The metal for the Schottky layer and the semiconductor material for the drift layer are selected to provide a low barrier height Schottky junction between the drift layer and the Schottky layer.
    Type: Application
    Filed: January 31, 2014
    Publication date: May 29, 2014
    Applicant: Cree, Inc.
    Inventors: Jason Patrick Henning, Qingchun Zhang, Sei-Hyung Ryu, Anant Kumar Agarwal, John Williams Palmour, Scott Allen
  • Publication number: 20140070230
    Abstract: A semiconductor die and a process for fabricating the semiconductor die are disclosed. The semiconductor die has a substrate and a silicon carbide (SiC) epitaxial structure on the substrate. The SiC epitaxial structure includes at least a first N-type SiC layer, at least a first P-type SiC layer, and carbon vacancy reduction material, which has been implanted into a surface of the SiC epitaxial structure. Further, the SiC epitaxial structure has been annealed to mobilize the carbon vacancy reduction material to diffuse carbon atoms substantially throughout the SiC epitaxial structure, thereby increasing an average carrier lifetime in the SiC epitaxial structure.
    Type: Application
    Filed: September 12, 2012
    Publication date: March 13, 2014
    Applicant: CREE, INC.
    Inventors: Michael John O'Loughlin, Lin Cheng, Albert Augustus Burk, JR., Anant Kumar Agarwal
  • Patent number: 8539406
    Abstract: Techniques and technology for formally verifying a first electronic design with a second electronic design that has been synthesized from the first electronic design, wherein the synthesis process included structural transformation operations, is provide herein. In various implementations, a first design and a second design are received. The second design having been synthesized from the first design, where no structural transformation operations were performed during synthesis of the second design. Additionally, a third design and a structural transformation guidance file are received. The third design having also been synthesized from the first design, but, where structural transformation operations were performed during synthesis of the third design. The structural transformation guidance file specifies what transformations where made during synthesis.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: September 17, 2013
    Inventors: Michael Mahar, Pradish Mathews, James Henson, Anant-Kumar Jain
  • Publication number: 20130207123
    Abstract: A power module is disclosed that includes a housing with an interior chamber wherein multiple switch modules are mounted within the interior chamber. The switch modules comprise multiple transistors and diodes that are interconnected to facilitate switching power to a load. In one embodiment, at least one of the switch modules supports a current density of at least 10 amperes per cm2.
    Type: Application
    Filed: August 17, 2012
    Publication date: August 15, 2013
    Applicant: CREE, INC.
    Inventors: Jason Patrick Henning, Qingchun Zhang, Sei-Hyung Ryu, Anant Kumar Agarwal, John Williams Palmour, Scott Allen
  • Publication number: 20130024910
    Abstract: Disclosed are systems, apparatus, and methods for integrating an information feed. In various implementations, an identity of a user may be determined based on authentication information, where the authentication information identifies a user profile. In some implementations, profile information is identified based on the determined identity, where the profile information identifies one or more entities tracked using one or more information feeds associated with the user profile, and where the one or more information feeds comprises one or more feed items stored in a database system. In various implementations, the identified profile information is associated with a user account provided by a network communications application.
    Type: Application
    Filed: June 6, 2012
    Publication date: January 24, 2013
    Applicant: SALESFORCE.COM, INC.
    Inventors: Anant Kumar Verma, Michael Brendan Tierney, Krzysztof Sebastian Oblucki, Blake Whitlow Markham
  • Publication number: 20120198398
    Abstract: Techniques and technology for formally verifying a first electronic design with a second electronic design that has been synthesized from the first electronic design, wherein the synthesis process included structural transformation operations, is provide herein. In various implementations, a first design and a second design are received. The second design having been synthesized from the first design, where no structural transformation operations were performed during synthesis of the second design. Additionally, a third design and a structural transformation guidance file are received. The third design having also been synthesized from the first design, but, where structural transformation operations were performed during synthesis of the third design. The structural transformation guidance file specifies what transformations where made during synthesis.
    Type: Application
    Filed: January 31, 2011
    Publication date: August 2, 2012
    Inventors: Michael Mahar, Pradish Mathews, James Henson, Anant-Kumar Jain
  • Publication number: 20120016456
    Abstract: A system for treating an aneurysm comprises an elongate flexible shaft and an expandable member. An expandable scaffold is disposed over the expandable member and may be expanded from a collapsed configuration to an expanded configuration. A double-walled filling structure is disposed over the scaffold and has an outer wall and an inner wall. The filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a substantially tubular lumen to provide a path for blood flow. In the expanded configuration the scaffold engages the inner wall of the filling structure. A tether is releasably coupled with the filling structure and the flexible shaft thereby constraining axial movement of the structures relative to each other.
    Type: Application
    Filed: September 23, 2011
    Publication date: January 19, 2012
    Applicant: Endologix, Inc.
    Inventors: Steven L. Herbowy, Michael A. Evans, Anant Kumar, K.T. Venkateswara Rao, Matthew R. Hellewell, Gil Laroya
  • Publication number: 20110015963
    Abstract: Techniques for enabling real-time enterprise workforce management over a telecom network are provided. The techniques include receiving real-time workforce information from one or more telecom networks, and using the real-time information for dynamic load optimization to enable real-time enterprise workforce management.
    Type: Application
    Filed: July 15, 2009
    Publication date: January 20, 2011
    Applicant: International Business Machines Corporation
    Inventors: Girish Bhimrao Chafle, Dipanjan Chakraborty, Koustuv Dasgupta, Anant Kumar, Sumit Mittal, Sougata Mukherjea, Seema Nagar
  • Publication number: 20100036360
    Abstract: A system for treating an aneurysm comprises an elongate flexible shaft and an expandable member. An expandable scaffold is disposed over the expandable member and may be expanded from a collapsed configuration to an expanded configuration. A double-walled filling structure is disposed over the scaffold and has an outer wall and an inner wall. The filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a substantially tubular lumen to provide a path for blood flow. In the expanded configuration the scaffold engages the inner wall of the filling structure. A tether is releasably coupled with the filling structure and the flexible shaft thereby constraining axial movement of the structures relative to each other.
    Type: Application
    Filed: April 24, 2009
    Publication date: February 11, 2010
    Applicant: Nellix, Inc.
    Inventors: Steven L. Herbowy, Michael A. Evans, Anant Kumar, K.T. Venkateswara Rao, Matthew R. Hellewell, Gil Laroya
  • Publication number: 20100004728
    Abstract: A prosthesis comprises a tubular body that is expandable from a contracted configuration to a radially expanded configuration. The tubular body has a total length and comprises a first section, a second section and a central section disposed therebetween. The total length of the tubular body in the expanded configuration is at least 95% of the total length of the tubular body in the contracted configuration. The three sections have a plurality of tubular rings, each with a plurality of struts having a length and coupled together to form a series of peaks and valleys. A connector couples adjacent tubular rings together. The length of the central section struts is different than the length of the other struts and the central section is coupled with both the first and second sections.
    Type: Application
    Filed: February 13, 2009
    Publication date: January 7, 2010
    Applicant: Nellix, Inc.
    Inventors: K.T. Venkateswara Rao, Anant Kumar, Ivan Tzvetanov
  • Publication number: 20090319029
    Abstract: A system for treating an aneurysm in a blood vessel comprises a docking scaffold having with upstream and downstream ends, and a central passageway therebetween. The upstream end engages the blood vessel upstream of the aneurysm. A portion of a first and second scaffolds are slidably received in the central passageway such that an outside surface of the first and second scaffolds engage an inside surface of the docking scaffold. A double-walled filling structure has outer and inner walls and the filling structure is adapted to be filled with a hardenable fluid filling medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a substantially tubular lumen to provide a path for blood flow therethrough. The double-walled filling structure is coupled with at least one of the first and second leg scaffolds in expanded configuration.
    Type: Application
    Filed: June 4, 2009
    Publication date: December 24, 2009
    Applicant: Nellix, Inc.
    Inventors: Michael A. Evans, Ivan Tzvetanov, Steven L. Herbowy, Raj P. Ganpath, Amy Lee, Anant Kumar, Gwendolyn A. Watanabe, K.T. Venkateswara Rao
  • Patent number: 7133417
    Abstract: A switch apparatus and method according to the invention provides a carrier-class switching platform with a highly optimized data path and distributed signaling stacks to achieve high-density differential voice services. Incoming voice calls of any media type (TDM voice/fax, VoIP, VoATM, VoFR) are packetized and adapted for egress transmission of the same or another media type according to the service plan profile of the parties, and/or the instantaneous availability or cost of bandwidth resources. All calls are switched in an ATM switching core with QoS characteristics that can also be determined based on service plan profile. A call server handles call setup and management functions, as well as call signaling. Advantageously, the call server provides signaling relay functions to further support and enable the media conversion of voice calls.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: November 7, 2006
    Assignee: Cisco Technology, Inc.
    Inventors: Ruey Kao, Venkat Kalkunte, Anant Kumar, Hy Quoc Pham