Patents by Inventor Zhengwen Li

Zhengwen Li 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: 10431557
    Abstract: The subject disclosure relates to techniques for providing semiconductor chip security using piezoelectricity. According to an embodiment, an apparatus is provided that comprises an integrated circuit chip comprising a pass transistor that electrically connects two or more electrical components of the integrated circuit chip. The apparatus further comprises a piezoelectric element electrically connected to a gate electrode of the pass transistor; and a packaging component that is physically connected to the piezoelectric element and applies a mechanical force to the piezoelectric element, wherein the piezoelectric element generates and provides a voltage to the gate electrode as a result of the mechanical force, thereby causing the pass transistor to be in an on-state. In one implementation, the two or more electrical components comprise a circuit and a power source. In another implementation, the two or more electrical components comprise two circuits.
    Type: Grant
    Filed: March 5, 2018
    Date of Patent: October 1, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Kangguo Cheng, Qing Cao, Fei Liu, Zhengwen Li
  • Publication number: 20190273049
    Abstract: The subject disclosure relates to techniques for providing semiconductor chip security using piezoelectricity. According to an embodiment, an apparatus is provided that comprises an integrated circuit chip comprising a pass transistor that electrically connects two or more electrical components of the integrated circuit chip. The apparatus further comprises a piezoelectric element electrically connected to a gate electrode of the pass transistor; and a packaging component that is physically connected to the piezoelectric element and applies a mechanical force to the piezoelectric element, wherein the piezoelectric element generates and provides a voltage to the gate electrode as a result of the mechanical force, thereby causing the pass transistor to be in an on-state. In one implementation, the two or more electrical components comprise a circuit and a power source. In another implementation, the two or more electrical components comprise two circuits.
    Type: Application
    Filed: March 5, 2018
    Publication date: September 5, 2019
    Inventors: Kangguo Cheng, Qing Cao, Fei Liu, Zhengwen Li
  • Patent number: 10373908
    Abstract: A semiconductor device includes a first dielectric layer formed on a second dielectric layer and planar contacts formed in the second dielectric layer. The planar contacts are spaced apart to form a gap therebetween. The first dielectric layer includes a thermally conductive dielectric layer and is formed on lateral sides of the planar contacts and in the gap. A resistive element is formed between the planar contacts over the gap and in contact with at least the thermally conductive dielectric layer in the gap.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: August 6, 2019
    Assignee: International Business Machines Corporation
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Patent number: 10365379
    Abstract: A dosimetry device includes a first chamber formed on a substrate with a first decomposable barrier sensitive to radiation and a first chemical component. A second chamber is formed on the substrate in proximity of the first chamber and includes a second decomposable barrier sensitive to radiation and a second chemical component. Upon a radiation event, decomposition of the first and second barriers of the first and second chambers permits a mixing of the first and second chemical components to cause a visible change of the dosimetry device.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: July 30, 2019
    Assignee: International Business Machines Corporation
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Patent number: 10355118
    Abstract: Semiconductor devices include a thin channel region formed on a buried insulator. A source and drain region is formed on the buried insulator, separated from the channel region by notches. A gate structure is formed on the thin channel region.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: July 16, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Patent number: 10224277
    Abstract: A semiconductor device includes a first dielectric layer formed from a thermally conductive dielectric material. Contacts are formed in the first dielectric layer, the planar contacts being spaced apart to form a gap therebetween. The thermally conductive dielectric material of the first dielectric layer is formed on lateral sides of the planar contacts and in the gap. A resistive element is formed laterally across the gap between the planar contacts and in direct contact with at least the thermally conductive dielectric material in the gap.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: March 5, 2019
    Assignee: International Business Machines Corporation
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Patent number: 10209367
    Abstract: A dosimetry device includes a first chamber formed on a substrate with a first decomposable barrier sensitive to radiation and a first chemical component. A second chamber is formed on the substrate in proximity of the first chamber and includes a second decomposable barrier sensitive to radiation and a second chemical component. Upon a radiation event, decomposition of the first and second barriers of the first and second chambers permits a mixing of the first and second chemical components to cause a visible change of the dosimetry device.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: February 19, 2019
    Assignee: International Business Machines Corporation
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Publication number: 20190004183
    Abstract: A dosimetry device includes a first chamber formed on a substrate with a first decomposable barrier sensitive to radiation and a first chemical component. A second chamber is formed on the substrate in proximity of the first chamber and includes a second decomposable barrier sensitive to radiation and a second chemical component. Upon a radiation event, decomposition of the first and second barriers of the first and second chambers permits a mixing of the first and second chemical components to cause a visible change of the dosimetry device.
    Type: Application
    Filed: August 14, 2018
    Publication date: January 3, 2019
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Patent number: 10090481
    Abstract: A method of arranging at least one carbon nanotube on a semiconductor substrate includes depositing the at least one carbon nanotube on a dielectric layer of the semiconductor device. The method further includes arranging the at least one carbon nanotube on the dielectric layer in response to applying a voltage potential to an electrically conductive electrode of the semiconductor device, and applying a ground potential to an electrically conductive semiconductor layer of the semiconductor device.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: October 2, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Qing Cao, Kangguo Cheng, Shu-Jen Han, Zhengwen Li, Fei Liu
  • Publication number: 20180277670
    Abstract: Semiconductor devices include a thin channel region formed on a buried insulator. A source and drain region is formed on the buried insulator, separated from the channel region by notches. A gate structure is formed on the thin channel region.
    Type: Application
    Filed: May 24, 2018
    Publication date: September 27, 2018
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Patent number: 10079354
    Abstract: A transistor device includes an array of fin structures arranged on a substrate, each of the fin structures being vertically alternating stacks of a first isoelectric point material having a first isoelectric point and a second isoelectric point material having a second isoelectric point that is different than the first isoelectric point; one or more carbon nanotubes (CNTs) suspended between the fin structures and contacting a side surface of the second isoelectric point material in the fin structures; a gate wrapped around the array of CNTs; and source and drain contacts arranged over the fin structures; wherein each of the fin structures have a trapezoid shape or parallel sides that are oriented about 90° with respect to the substrate.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: September 18, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu, Zhen Zhang
  • Publication number: 20180261504
    Abstract: An integrated circuit includes an array of devices with a logic pattern to implement a physically unclonable function (PUF) for chip authentication. The logic pattern is determined in accordance with processing variations during the manufacturing. The array of devices includes one or more components having a first state and one or more components having a second state. A combination of the first and second states provides the logic pattern.
    Type: Application
    Filed: May 14, 2018
    Publication date: September 13, 2018
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Patent number: 10062857
    Abstract: Vacuum transistors with carbon nanotube as the collector and/or emitter electrodes are provided. In one aspect, a method for forming a vacuum transistor includes the steps of: covering a substrate with an insulating layer; forming a back gate(s) in the insulating layer; depositing a gate dielectric over the back gate; forming a carbon nanotube layer on the gate dielectric; patterning the carbon nanotube layer to provide first/second portions thereof over first/second sides of the back gate, separated from one another by a gap G, which serve as emitter and collector electrodes; forming a vacuum channel in the gate dielectric; and forming metal contacts to the emitter and collector electrodes. Vacuum transistors are also provided.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: August 28, 2018
    Assignee: International Business Machines Corporation
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Publication number: 20180218872
    Abstract: A vacuum transistor includes a substrate and a first terminal formed on the substrate. A piezoelectric element has a second terminal formed on the piezoelectric element, wherein the piezoelectric element is provided over the first terminal to provide a gap between the first terminal and the second terminal. The gap is adjusted in accordance with an electrical field on the piezoelectric element.
    Type: Application
    Filed: November 2, 2017
    Publication date: August 2, 2018
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Publication number: 20180218871
    Abstract: A vacuum transistor includes a substrate and a first terminal formed on the substrate. A piezoelectric element has a second terminal formed on the piezoelectric element, wherein the piezoelectric element is provided over the first terminal to provide a gap between the first terminal and the second terminal. The gap is adjusted in accordance with an electrical field on the piezoelectric element.
    Type: Application
    Filed: January 30, 2017
    Publication date: August 2, 2018
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Patent number: 10032897
    Abstract: Semiconductor devices and methods of making the same include forming a gate structure on a thin semiconductor layer. Additional semiconductor material is formed on the thin semiconductor layer. The thin semiconductor layer is etched back and the additional semiconductor material to form source and drain regions and a channel region, with notches separating the source and drain region from the channel region.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: July 24, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Publication number: 20180205031
    Abstract: A technique relates to a vertical device. A gate is embedded in a transparent substrate. A gate dielectric material is disposed on the gate. A nanotube film is disposed on the gate dielectric material. A quantum dot light emitting diode is disposed on a portion of the nanotube film.
    Type: Application
    Filed: January 17, 2017
    Publication date: July 19, 2018
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Patent number: 10026648
    Abstract: An integrated circuit includes an array of devices including a physically unclonable function (PUF) for chip authentication. A logic pattern is stored in the devices. The logic pattern is determined in accordance with processing variations during manufacture of the array. The logic pattern is represented with a first state for one or more devices with contact shorts and a second state with one or more devices without contact shorts.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: July 17, 2018
    Assignee: International Business Machines Corporation
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Patent number: 10026912
    Abstract: A technique relates to a vertical device. A gate is embedded in a transparent substrate. A gate dielectric material is disposed on the gate. A nanotube film is disposed on the gate dielectric material. A quantum dot light emitting diode is disposed on a portion of the nanotube film.
    Type: Grant
    Filed: January 17, 2017
    Date of Patent: July 17, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Qing Cao, Kangguo Cheng, Zhengwen Li, Fei Liu
  • Publication number: 20180145270
    Abstract: A method of arranging at least one carbon nanotube on a semiconductor substrate includes depositing the at least one carbon nanotube on a dielectric layer of the semiconductor device. The method further includes arranging the at least one carbon nanotube on the dielectric layer in response to applying a voltage potential to an electrically conductive electrode of the semiconductor device, and applying a ground potential to an electrically conductive semiconductor layer of the semiconductor device.
    Type: Application
    Filed: January 5, 2018
    Publication date: May 24, 2018
    Inventors: Qing Cao, Kangguo Cheng, Shu-Jen Han, Zhengwen Li, Fei Liu