Patents by Inventor Xiangxiang LU

Xiangxiang LU 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: 12191300
    Abstract: Embodiments of the disclosure provide an integrated circuit (IC) structure with resistive semiconductor material for a back well. The IC structure may include a semiconductor substrate having a deep well, and a device within a first portion of the deep well. The device includes a first doped semiconductor material coupled to a first contact, and a second doped semiconductor material coupled to a second contact. The deep well couples the first doped semiconductor material to the second doped semiconductor material. A first back well is within a second portion of the deep well. A first resistive semiconductor material is within the deep well and defines a boundary between the first portion of the deep well and the second portion of the deep well.
    Type: Grant
    Filed: May 11, 2022
    Date of Patent: January 7, 2025
    Assignee: GlobalFoundries U.S. Inc.
    Inventors: Robert J. Gauthier, Jr., Rajendran Krishnasamy, Anupam Dutta, Anindya Nath, Xiangxiang Lu, Satyasuresh Vvss Choppalli, Lin Lin
  • Publication number: 20230369314
    Abstract: Embodiments of the disclosure provide an integrated circuit (IC) structure with resistive semiconductor material for a back well. The IC structure may include a semiconductor substrate having a deep well, and a device within a first portion of the deep well. The device includes a first doped semiconductor material coupled to a first contact, and a second doped semiconductor material coupled to a second contact. The deep well couples the first doped semiconductor material to the second doped semiconductor material. A first back well is within a second portion of the deep well. A first resistive semiconductor material is within the deep well and defines a boundary between the first portion of the deep well and the second portion of the deep well.
    Type: Application
    Filed: May 11, 2022
    Publication date: November 16, 2023
    Inventors: Robert J. Gauthier, JR., Rajendran Krishnasamy, Anupam Dutta, Anindya Nath, Xiangxiang Lu, Satyasuresh Vvss Choppalli, Lin Lin
  • Patent number: 10741542
    Abstract: High-voltage semiconductor devices with electrostatic discharge (ESD) protection and methods of fabrication are provided. The semiconductor devices include a plurality of transistors on a substrate patterned with one or more common gates extending across a portion of the substrate, and a plurality of first S/D contacts and a plurality of second S/D contacts associated with the common gate(s). The second S/D contacts are disposed over a plurality of carrier-doped regions within the substrate. One or more floating nodes are disposed above the substrate and, at least in part, between second S/D contacts to facilitate defining the plurality of carrier-doped regions within the substrate. For instance, the carrier-doped regions may be defined from a mask with a common carrier-region opening, with the floating node(s) intersecting the common carrier-region opening and facilitating defining, along with the common opening, the plurality of separate carrier-doped regions.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: August 11, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Chien-Hsin Lee, Xiangxiang Lu, Manjunatha Prabhu, Mahadeva Iyer Natarajan
  • Publication number: 20200135856
    Abstract: The disclosure provides an apparatus for preventing an integrated circuit (IC) structure from entering a latch-up mode. In an embodiment, the apparatus may include: a p-type substrate; an n-well within the p-type substrate; an n-type region within the p-type substrate, the n-type region being distinct from the n-well; a p-type region within the n-well; a power supply electrically coupled to the p-type region within the n-well; and a directional diode electrically coupling the power supply to the n-well in parallel with the p-type region. The directional diode biases a current flow from the power supply to the n-well, and the directional diode contacts the n-well distal to the p-type region.
    Type: Application
    Filed: October 31, 2018
    Publication date: April 30, 2020
    Inventors: Shunhua T. Chang, Ephrem G. Gebreselasie, Mujahid Muhammad, Xiangxiang Lu, Mickey H. Yu
  • Patent number: 10636872
    Abstract: The disclosure provides an apparatus for preventing an integrated circuit (IC) structure from entering a latch-up mode. In an embodiment, the apparatus may include: a p-type substrate; an n-well within the p-type substrate; an n-type region within the p-type substrate, the n-type region being distinct from the n-well; a p-type region within the n-well; a power supply electrically coupled to the p-type region within the n-well; and a directional diode electrically coupling the power supply to the n-well in parallel with the p-type region. The directional diode biases a current flow from the power supply to the n-well, and the directional diode contacts the n-well distal to the p-type region.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: April 28, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Shunhua T. Chang, Ephrem G. Gebreselasie, Mujahid Muhammad, Xiangxiang Lu, Mickey H. Yu
  • Publication number: 20180342501
    Abstract: High-voltage semiconductor devices with electrostatic discharge (ESD) protection and methods of fabrication are provided. The semiconductor devices include a plurality of transistors on a substrate patterned with one or more common gates extending across a portion of the substrate, and a plurality of first S/D contacts and a plurality of second S/D contacts associated with the common gate(s). The second S/D contacts are disposed over a plurality of carrier-doped regions within the substrate. One or more floating nodes are disposed above the substrate and, at least in part, between second S/D contacts to facilitate defining the plurality of carrier-doped regions within the substrate. For instance, the carrier-doped regions may be defined from a mask with a common carrier-region opening, with the floating node(s) intersecting the common carrier-region opening and facilitating defining, along with the common opening, the plurality of separate carrier-doped regions.
    Type: Application
    Filed: August 6, 2018
    Publication date: November 29, 2018
    Applicant: GLOBALFOUNDRIES Inc.
    Inventors: Chien-Hsin LEE, Xiangxiang LU, Manjunatha PRABHU, Mahadeva Iyer NATARAJAN
  • Patent number: 10068895
    Abstract: High-voltage semiconductor devices with electrostatic discharge (ESD) protection and methods of fabrication are provided. The semiconductor devices include a plurality of transistors on a substrate patterned with one or more common gates extending across a portion of the substrate, and a plurality of first S/D contacts and a plurality of second S/D contacts associated with the common gate(s). The second S/D contacts are disposed over a plurality of carrier-doped regions within the substrate. One or more floating nodes are disposed above the substrate and, at least in part, between second S/D contacts to facilitate defining the plurality of carrier-doped regions within the substrate. For instance, the carrier-doped regions may be defined from a mask with a common carrier-region opening, with the floating node(s) intersecting the common carrier-region opening and facilitating defining, along with the common opening, the plurality of separate carrier-doped regions.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: September 4, 2018
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Chien-Hsin Lee, Xiangxiang Lu, Manjunatha Prabhu, Mahadeva Iyer Natarajan
  • Patent number: 9831236
    Abstract: An electro-static discharge (ESD) protection transistor device includes a plurality of transistor gates that extend parallel to one another in a first direction and a plurality of source/drain diffusion areas that extend parallel to one another in a second direction perpendicular to the first direction. Each source/drain diffusion area comprises a plurality of source/drain areas disposed between respective ones of the plurality of transistor gates. The ESD protection transistor device further includes a source contact positioned over each source area of the plurality of source areas and a drain contact positioned over each drain area of the plurality of drain areas. With respect to each source/drain diffusion area of the plurality of source/drain diffusion areas, the source contacts are offset from the drain contacts with respect to the first direction.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: November 28, 2017
    Assignee: GLOBALFOUNDRIES, INC.
    Inventors: Chien-Hsin Lee, Xiangxiang Lu, Mahadeva Iyer Natarajan
  • Patent number: 9761664
    Abstract: Integrated circuits with lateral bipolar transistors and methods for fabricating the same are provided. An exemplary integrated circuit includes a semiconductor layer overlying an insulator layer. The semiconductor layer includes a first region having a first thickness and a trench region having a second thickness less than the first thickness. The integrated circuit further includes an isolation region formed over the trench region of the semiconductor layer. Also, the integrated circuit includes a lateral bipolar transistor including a base formed in the trench region of the semiconductor layer, an emitter, and a collector.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: September 12, 2017
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Wei Gao, Manjunatha Prabhu, Chien-Hsin Lee, Xiangxiang Lu, Vaddagere Nagaraju Vasantha Kumar
  • Patent number: 9741849
    Abstract: Integrated circuits and methods of producing such integrated circuits are provided. In an exemplary embodiment, an integrated circuit includes a heavily doped source area having conductivity determining impurities at a heavily doped source concentration and a lightly doped drain area having conductivity determining impurities at a lightly doped drain concentration less than the heavily doped source concentration. A drain conductor directly contacts the lightly doped drain area, and a channel is positioned between the heavily doped source area and the lightly doped drain area. A gate overlies the channel.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: August 22, 2017
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Chien-Hsin Lee, Mahadeva Iyer Natarajan, Xiangxiang Lu, Tsung-Che Tsai, Manjunatha Prabhu
  • Publication number: 20170194311
    Abstract: Integrated circuits and methods of producing such integrated circuits are provided. In an exemplary embodiment, an integrated circuit includes a first common line and a second common line. A first electrostatic discharge line is in electrical communication with the first and second common lines. The first electrostatic discharge line includes a first diode and a first clamping device.
    Type: Application
    Filed: December 31, 2015
    Publication date: July 6, 2017
    Inventors: Xiangxiang Lu, Manjunatha Prabhu, Chien-Hsin Lee
  • Patent number: 9698139
    Abstract: Integrated circuits with components for protection from electrostatic discharge are provided. An integrated circuit includes a first common line and a second common line. A first electrostatic discharge line is in electrical communication with the first and second common lines. The first electrostatic discharge line includes a first diode and a first clamping device.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: July 4, 2017
    Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.
    Inventors: Xiangxiang Lu, Manjunatha Prabhu, Chien-Hsin Lee
  • Publication number: 20160322345
    Abstract: An electro-static discharge (ESD) protection transistor device includes a plurality of transistor gates that extend parallel to one another in a first direction and a plurality of source/drain diffusion areas that extend parallel to one another in a second direction perpendicular to the first direction. Each source/drain diffusion area comprises a plurality of source/drain areas disposed between respective ones of the plurality of transistor gates. The ESD protection transistor device further includes a source contact positioned over each source area of the plurality of source areas and a drain contact positioned over each drain area of the plurality of drain areas. With respect to each source/drain diffusion area of the plurality of source/drain diffusion areas, the source contacts are offset from the drain contacts with respect to the first direction.
    Type: Application
    Filed: April 29, 2015
    Publication date: November 3, 2016
    Inventors: Chien-Hsin Lee, Xiangxiang Lu, Mahadeva Iyer Natarajan
  • Publication number: 20160276336
    Abstract: High-voltage semiconductor devices with electrostatic discharge (ESD) protection and methods of fabrication are provided. The semiconductor devices include a plurality of transistors on a substrate patterned with one or more common gates extending across a portion of the substrate, and a plurality of first S/D contacts and a plurality of second S/D contacts associated with the common gate(s). The second S/D contacts are disposed over a plurality of carrier-doped regions within the substrate. One or more floating nodes are disposed above the substrate and, at least in part, between second S/D contacts to facilitate defining the plurality of carrier-doped regions within the substrate. For instance, the carrier-doped regions may be defined from a mask with a common carrier-region opening, with the floating node(s) intersecting the common carrier-region opening and facilitating defining, along with the common opening, the plurality of separate carrier-doped regions.
    Type: Application
    Filed: March 18, 2015
    Publication date: September 22, 2016
    Applicant: GLOBALFOUNDRIES INC.
    Inventors: Chien-Hsin LEE, Xiangxiang LU, Manjunatha PRABHU, Mahadeva Iyer NATARAJAN