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).
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Patent number: 12191300Abstract: 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: GrantFiled: May 11, 2022Date of Patent: January 7, 2025Assignee: GlobalFoundries U.S. Inc.Inventors: Robert J. Gauthier, Jr., Rajendran Krishnasamy, Anupam Dutta, Anindya Nath, Xiangxiang Lu, Satyasuresh Vvss Choppalli, Lin Lin
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Publication number: 20230369314Abstract: 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: ApplicationFiled: May 11, 2022Publication date: November 16, 2023Inventors: Robert J. Gauthier, JR., Rajendran Krishnasamy, Anupam Dutta, Anindya Nath, Xiangxiang Lu, Satyasuresh Vvss Choppalli, Lin Lin
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Patent number: 10741542Abstract: 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: GrantFiled: August 6, 2018Date of Patent: August 11, 2020Assignee: GLOBALFOUNDRIES INC.Inventors: Chien-Hsin Lee, Xiangxiang Lu, Manjunatha Prabhu, Mahadeva Iyer Natarajan
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Publication number: 20200135856Abstract: 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: ApplicationFiled: October 31, 2018Publication date: April 30, 2020Inventors: Shunhua T. Chang, Ephrem G. Gebreselasie, Mujahid Muhammad, Xiangxiang Lu, Mickey H. Yu
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Patent number: 10636872Abstract: 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: GrantFiled: October 31, 2018Date of Patent: April 28, 2020Assignee: GLOBALFOUNDRIES INC.Inventors: Shunhua T. Chang, Ephrem G. Gebreselasie, Mujahid Muhammad, Xiangxiang Lu, Mickey H. Yu
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Publication number: 20180342501Abstract: 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: ApplicationFiled: August 6, 2018Publication date: November 29, 2018Applicant: GLOBALFOUNDRIES Inc.Inventors: Chien-Hsin LEE, Xiangxiang LU, Manjunatha PRABHU, Mahadeva Iyer NATARAJAN
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Patent number: 10068895Abstract: 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: GrantFiled: March 18, 2015Date of Patent: September 4, 2018Assignee: GLOBALFOUNDRIES INC.Inventors: Chien-Hsin Lee, Xiangxiang Lu, Manjunatha Prabhu, Mahadeva Iyer Natarajan
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Patent number: 9831236Abstract: 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: GrantFiled: April 29, 2015Date of Patent: November 28, 2017Assignee: GLOBALFOUNDRIES, INC.Inventors: Chien-Hsin Lee, Xiangxiang Lu, Mahadeva Iyer Natarajan
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Patent number: 9761664Abstract: 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: GrantFiled: April 20, 2016Date of Patent: September 12, 2017Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.Inventors: Wei Gao, Manjunatha Prabhu, Chien-Hsin Lee, Xiangxiang Lu, Vaddagere Nagaraju Vasantha Kumar
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Patent number: 9741849Abstract: 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: GrantFiled: April 8, 2016Date of Patent: August 22, 2017Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.Inventors: Chien-Hsin Lee, Mahadeva Iyer Natarajan, Xiangxiang Lu, Tsung-Che Tsai, Manjunatha Prabhu
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Publication number: 20170194311Abstract: 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: ApplicationFiled: December 31, 2015Publication date: July 6, 2017Inventors: Xiangxiang Lu, Manjunatha Prabhu, Chien-Hsin Lee
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Patent number: 9698139Abstract: 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: GrantFiled: December 31, 2015Date of Patent: July 4, 2017Assignee: GLOBALFOUNDRIES SINGAPORE PTE. LTD.Inventors: Xiangxiang Lu, Manjunatha Prabhu, Chien-Hsin Lee
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Publication number: 20160322345Abstract: 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: ApplicationFiled: April 29, 2015Publication date: November 3, 2016Inventors: Chien-Hsin Lee, Xiangxiang Lu, Mahadeva Iyer Natarajan
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Publication number: 20160276336Abstract: 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: ApplicationFiled: March 18, 2015Publication date: September 22, 2016Applicant: GLOBALFOUNDRIES INC.Inventors: Chien-Hsin LEE, Xiangxiang LU, Manjunatha PRABHU, Mahadeva Iyer NATARAJAN