Patents by Inventor Prabu Gopalraja

Prabu Gopalraja 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: 20210134561
    Abstract: Systems and methods for tunable workpiece biasing in a plasma reactor are provided herein. In some embodiments, a system includes: a plasma chamber that performs plasma processing on a workpiece, a first pulsed voltage source, coupled directly to a workpiece, a second pulsed voltage source, coupled capacitively to the workpiece, and a biasing controller comprising one or more processors, and memory, wherein the memory comprises a set of computer instructions that when executed by the one or more processors, independently controls the first pulsed voltage source and the second pulsed voltage source based on one or more parameters of the first pulsed voltage source and the second pulsed voltage source in order to tailor ion energy distribution of the flux of ions directed to the workpiece.
    Type: Application
    Filed: January 8, 2021
    Publication date: May 6, 2021
    Inventors: Travis KOH, Philip Allan KRAUS, Leonid DORF, Prabu GOPALRAJA
  • Patent number: 10923320
    Abstract: Systems and methods for tunable workpiece biasing in a plasma reactor are provided herein. In some embodiments, a system includes: a plasma chamber that performs plasma processing on a workpiece, a first pulsed voltage source, coupled directly to a workpiece, a second pulsed voltage source, coupled capacitively to the workpiece, and a biasing controller comprising one or more processors, and memory, wherein the memory comprises a set of computer instructions that when executed by the one or more processors, independently controls the first pulsed voltage source and the second pulsed voltage source based on one or more parameters of the first pulsed voltage source and the second pulsed voltage source in order to tailor ion energy distribution of the flux of ions directed to the workpiece.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: February 16, 2021
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Travis Koh, Philip Allan Kraus, Leonid Dorf, Prabu Gopalraja
  • Publication number: 20190348258
    Abstract: Systems and methods for tunable workpiece biasing in a plasma reactor are provided herein. In some embodiments, a system includes: a plasma chamber that performs plasma processing on a workpiece, a first pulsed voltage source, coupled directly to a workpiece, a second pulsed voltage source, coupled capacitively to the workpiece, and a biasing controller comprising one or more processors, and memory, wherein the memory comprises a set of computer instructions that when executed by the one or more processors, independently controls the first pulsed voltage source and the second pulsed voltage source based on one or more parameters of the first pulsed voltage source and the second pulsed voltage source in order to tailor ion energy distribution of the flux of ions directed to the workpiece.
    Type: Application
    Filed: July 24, 2019
    Publication date: November 14, 2019
    Inventors: TRAVIS KOH, PHILIP ALLAN KRAUS, LEONID DORF, PRABU GOPALRAJA
  • Patent number: 10373804
    Abstract: Systems and methods for tunable workpiece biasing in a plasma reactor are provided herein. In some embodiments, a system includes: a plasma chamber that performs plasma processing on a workpiece, a first pulsed voltage source, coupled directly to a workpiece, a second pulsed voltage source, coupled capacitively to the workpiece, and a biasing controller comprising one or more processors, and memory, wherein the memory comprises a set of computer instructions that when executed by the one or more processors, independently controls the first pulsed voltage source and the second pulsed voltage source based on one or more parameters of the first pulsed voltage source and the second pulsed voltage source in order to tailor ion energy distribution of the flux of ions directed to the workpiece.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: August 6, 2019
    Assignee: APPLIED MATERIALS, INC.
    Inventors: Travis Koh, Philip Allan Kraus, Leonid Dorf, Prabu Gopalraja
  • Publication number: 20180226225
    Abstract: Systems and methods for tunable workpiece biasing in a plasma reactor are provided herein. In some embodiments, a system includes: a plasma chamber that performs plasma processing on a workpiece, a first pulsed voltage source, coupled directly to a workpiece, a second pulsed voltage source, coupled capacitively to the workpiece, and a biasing controller comprising one or more processors, and memory, wherein the memory comprises a set of computer instructions that when executed by the one or more processors, independently controls the first pulsed voltage source and the second pulsed voltage source based on one or more parameters of the first pulsed voltage source and the second pulsed voltage source in order to tailor ion energy distribution of the flux of ions directed to the workpiece.
    Type: Application
    Filed: February 3, 2017
    Publication date: August 9, 2018
    Inventors: TRAVIS KOH, PHILIP ALLAN KRAUS, LEONID DORF, PRABU GOPALRAJA
  • Patent number: 9441298
    Abstract: Described are apparatus and methods for forming films comprise indium and arsenic. In particular, these films may be formed in a configuration of two or more chambers under “load lock” conditions. These films may include additional components as dopants, such as aluminum and/or gallium. Such films can be used in metal/silicon contacts having low contact resistances. Also disclosed are devices including the films comprising indium arsenide.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: September 13, 2016
    Assignee: Applied Materials, Inc.
    Inventors: Khaled Z. Ahmed, Prabu Gopalraja, Atif Noori, Mei Chang
  • Publication number: 20160068962
    Abstract: Described are apparatus and methods for forming films comprise indium and arsenic. In particular, these films may be formed in a configuration of two or more chambers under “load lock” conditions. These films may include additional components as dopants, such as aluminum and/or gallium. Such films can be used in metal/silicon contacts having low contact resistances. Also disclosed are devices including the films comprising indium arsenide.
    Type: Application
    Filed: November 12, 2015
    Publication date: March 10, 2016
    Inventors: Khaled Z. Ahmed, Prabu Gopalraja, Atif Noori, Mei Chang
  • Patent number: 9190320
    Abstract: Described are apparatus and methods for forming films comprise indium and arsenic. In particular, these films may be formed in a configuration of two or more chambers under “load lock” conditions. These films may include additional components as dopants, such as aluminum and/or gallium. Such films can be used in metal/silicon contacts having low contact resistances. Also disclosed are devices including the films comprising indium arsenide.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: November 17, 2015
    Assignee: Applied Materials, Inc.
    Inventors: Khaled Z. Ahmed, Prabu Gopalraja, Atif Noori, Mei Chang
  • Publication number: 20130200518
    Abstract: Described are apparatus and methods for forming films comprise indium and arsenic. In particular, these films may be formed in a configuration of two or more chambers under “load lock” conditions. These films may include additional components as dopants, such as aluminum and/or gallium. Such films can be used in metal/silicon contacts having low contact resistances. Also disclosed are devices including the films comprising indium arsenide.
    Type: Application
    Filed: January 24, 2013
    Publication date: August 8, 2013
    Inventors: Khaled Z. Ahmed, Prabu Gopalraja, Atif Noori, Mei Chang