Patents by Inventor Wenjuan Zhu
Wenjuan Zhu 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: 11527648Abstract: Transistors with switchable polarity and non-volatile configurations are provided. The transistors include a van der Waals (vdW) semiconductor layer. A ferroelectric layer with local polarization determines the type and concentration of the doping in the vdW semiconductor layer. Local program gates allow application of voltage to set or switch the polarization in the ferroelectric layer in the source and drain regions. Source and drain contacts permit either n-type or p-type transistor operations according to the carrier polarity in the vdW semiconductor layer.Type: GrantFiled: February 1, 2021Date of Patent: December 13, 2022Assignee: The Board of Trustees of the University of IllinoisInventors: Wenjuan Zhu, Kai Xu, Jialun Liu, Zijing Zhao
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Patent number: 11239320Abstract: A classifier circuit includes an array of dual gate graphene transistors, each of the transistors having a source, a top gate receiving one of an input voltage to be evaluated or a reference voltage, a bottom or embedded gate receiving the other of the input voltage or reference voltage and a drain, the source and drain contacting a graphene channel One of the source and the drain is connected to a voltage source. A common output combines output current of a plurality of the dual gate graphene transistors, which current varies in response to the difference between the input voltage and the reference voltage. A method for forming a classifier transistor with high remanent polarization forms dielectric with ferroelectric capability on a low resistivity substrate. A non-ferroelectric oxide layer is formed on the dielectric. A window is opened, and a graphene channel is formed in the window.Type: GrantFiled: December 6, 2019Date of Patent: February 1, 2022Assignee: The Board of Trustees of the University of IllinoisInventors: Wenjuan Zhu, Jialun Liu, Hojoon Ryu
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Publication number: 20210249539Abstract: Transistors with switchable polarity and non-volatile configurations are provided. The transistors include a van der Waals (vdW) semiconductor layer. A ferroelectric layer with local polarization determines the type and concentration of the doping in the vdW semiconductor layer. Local program gates allow application of voltage to set or switch the polarization in the ferroelectric layer in the source and drain regions. Source and drain contacts permit either n-type or p-type transistor operations according to the carrier polarity in the vdW semiconductor layer.Type: ApplicationFiled: February 1, 2021Publication date: August 12, 2021Inventors: Wenjuan Zhu, Kai Xu, Jialun Liu, Zijing Zhao
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Publication number: 20200194557Abstract: A classifier circuit includes an array of dual gate graphene transistors, each of the transistors having a source, a top gate receiving one of an input voltage to be evaluated or a reference voltage, a bottom or embedded gate receiving the other of the input voltage or reference voltage and a drain, the source and drain contacting a graphene channel One of the source and the drain is connected to a voltage source. A common output combines output current of a plurality of the dual gate graphene transistors, which current varies in response to the difference between the input voltage and the reference voltage. A method for forming a classifier transistor with high remanent polarization forms dielectric with ferroelectric capability on a low resistivity substrate. A non-ferroelectric oxide layer is formed on the dielectric. A window is opened, and a graphene channel is formed in the window.Type: ApplicationFiled: December 6, 2019Publication date: June 18, 2020Inventors: Wenjuan Zhu, Jialun Liu, Hojoon Ryu
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Graphene transistor gated by charges through a nanopore for bio-molecular sensing and DNA sequencing
Patent number: 10385390Abstract: A technique for a nanodevice is provided. A reservoir is separated into two parts by a membrane. A nanopore is formed through the membrane, and the nanopore connects the two parts of the reservoir. The nanopore and the two parts of the reservoir are filled with ionic buffer. The membrane includes a graphene layer and insulating layers. The graphene layer is wired to first and second metal pads to form a graphene transistor in which transistor current flowing through the graphene transistor is modulated by charges or dipoles passing through the nanopore.Type: GrantFiled: June 29, 2017Date of Patent: August 20, 2019Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hongbo Peng, Gustavo A. Stolovitzky, Wenjuan Zhu -
Patent number: 10236386Abstract: The present disclosure provides vertical hetero- and homo-junction tunnel FET (TFET) based on multi-layer black phosphorus (BP) and transition metal dichalcogenides.Type: GrantFiled: December 15, 2017Date of Patent: March 19, 2019Assignee: The Board of Trustees of the University of IllinoisInventors: Wenjuan Zhu, Shang-Chun Lu, Mohamed Mohamed
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Publication number: 20180204953Abstract: The present disclosure provides vertical hetero- and homo-junction tunnel FET (TFET) based on multi-layer black phosphorus (BP) and transition metal dichalcogenides.Type: ApplicationFiled: December 15, 2017Publication date: July 19, 2018Applicant: The Board of Trustees of the University of IllinoisInventors: Wenjuan Zhu, Shang-Chun Lu, Mohamed Mohamed
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GRAPHENE TRANSISTOR GATED BY CHARGES THROUGH A NANOPORE FOR BIO-MOLECULAR SENSING AND DNA SEQUENCING
Publication number: 20170298429Abstract: A technique for a nanodevice is provided. A reservoir is separated into two parts by a membrane. A nanopore is formed through the membrane, and the nanopore connects the two parts of the reservoir. The nanopore and the two parts of the reservoir are filled with ionic buffer. The membrane includes a graphene layer and insulating layers. The graphene layer is wired to first and second metal pads to form a graphene transistor in which transistor current flowing through the graphene transistor is modulated by charges or dipoles passing through the nanopore.Type: ApplicationFiled: June 29, 2017Publication date: October 19, 2017Inventors: Hongbo Peng, Gustavo A. Stolovitzky, Wenjuan Zhu -
Graphene transistor gated by charges through a nanopore for bio-molecular sensing and DNA sequencing
Patent number: 9765392Abstract: A technique for a nanodevice is provided. A reservoir is separated into two parts by a membrane. A nanopore is formed through the membrane, and the nanopore connects the two parts of the reservoir. The nanopore and the two parts of the reservoir are filled with ionic buffer. The membrane includes a graphene layer and insulating layers. The graphene layer is wired to first and second metal pads to form a graphene transistor in which transistor current flowing through the graphene transistor is modulated by charges or dipoles passing through the nanopore.Type: GrantFiled: May 22, 2012Date of Patent: September 19, 2017Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hongbo Peng, Gustavo A. Stolovitzky, Wenjuan Zhu -
Graphene transistor gated by charges through a nanopore for bio-molecular sensing and DNA sequencing
Patent number: 9758822Abstract: A technique for a nanodevice is provided. A reservoir is separated into two parts by a membrane. A nanopore is formed through the membrane, and the nanopore connects the two parts of the reservoir. The nanopore and the two parts of the reservoir are filled with ionic buffer. The membrane includes a graphene layer and insulating layers. The graphene layer is wired to first and second metal pads to form a graphene transistor in which transistor current flowing through the graphene transistor is modulated by charges or dipoles passing through the nanopore.Type: GrantFiled: January 24, 2014Date of Patent: September 12, 2017Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hongbo Peng, Gustavo A. Stolovitzky, Wenjuan Zhu -
Graphene transistor gated by charges through a nanopore for bio-molecular sensing and DNA sequencing
Patent number: 9758821Abstract: A technique for a nanodevice is provided. A reservoir is separated into two parts by a membrane. A nanopore is formed through the membrane, and the nanopore connects the two parts of the reservoir. The nanopore and the two parts of the reservoir are filled with ionic buffer. The membrane includes a graphene layer and insulating layers. The graphene layer is wired to first and second metal pads to form a graphene transistor in which transistor current flowing through the graphene transistor is modulated by charges passing through the nanopore.Type: GrantFiled: April 17, 2012Date of Patent: September 12, 2017Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Hongbo Peng, Gustavo A. Stolovitzky, Wenjuan Zhu -
Patent number: 9377431Abstract: A technique is provided for performing sequencing with a nanodevice. Alternating graphene layers and dielectric layers are provided one on top of another to form a multilayer stack of heterojunctions. The dielectric layers include boron nitride, molybdenum disulfide, and/or hafnium disulfide layers. A nanopore is formed through the graphene layers and the dielectric layers. The graphene layers are individually addressed by applying individual voltages to each of the graphene layers on a one to one basis when a particular base of a molecule is in the nanopore. Each of the graphene layers is an electrode. Individual electrical currents are measured for each of the graphene layers as the particular base moves from a first graphene layer through a last graphene layer in the nanopore. The base is identified according to the individual electrical currents repeatedly measured for the base moving from the first through last graphene layer in the nanopore.Type: GrantFiled: July 24, 2013Date of Patent: June 28, 2016Assignee: GLOBALFOUNDRIES INC.Inventor: Wenjuan Zhu
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Patent number: 9377432Abstract: A technique is provided for performing sequencing with a nanodevice. Alternating graphene layers and dielectric layers are provided one on top of another to form a multilayer stack of heterojunctions. The dielectric layers include boron nitride, molybdenum disulfide, and/or hafnium disulfide layers. A nanopore is formed through the graphene layers and the dielectric layers. The graphene layers are individually addressed by applying individual voltages to each of the graphene layers on a one to one basis when a particular base of a molecule is in the nanopore. Each of the graphene layers is an electrode. Individual electrical currents are measured for each of the graphene layers as the particular base moves from a first graphene layer through a last graphene layer in the nanopore. The base is identified according to the individual electrical currents repeatedly measured for the base moving from the first through last graphene layer in the nanopore.Type: GrantFiled: August 20, 2013Date of Patent: June 28, 2016Assignee: GLOBALFOUNDRIES INC.Inventor: Wenjuan Zhu
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Publication number: 20150028845Abstract: A technique is provided for performing sequencing with a nanodevice. Alternating graphene layers and dielectric layers are provided one on top of another to form a multilayer stack of heterojunctions. The dielectric layers include boron nitride, molybdenum disulfide, and/or hafnium disulfide layers. A nanopore is formed through the graphene layers and the dielectric layers. The graphene layers are individually addressed by applying individual voltages to each of the graphene layers on a one to one basis when a particular base of a molecule is in the nanopore. Each of the graphene layers is an electrode. Individual electrical currents are measured for each of the graphene layers as the particular base moves from a first graphene layer through a last graphene layer in the nanopore. The base is identified according to the individual electrical currents repeatedly measured for the base moving from the first through last graphene layer in the nanopore.Type: ApplicationFiled: July 24, 2013Publication date: January 29, 2015Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventor: Wenjuan Zhu
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Publication number: 20150028846Abstract: A technique is provided for performing sequencing with a nanodevice. Alternating graphene layers and dielectric layers are provided one on top of another to form a multilayer stack of heterojunctions. The dielectric layers include boron nitride, molybdenum disulfide, and/or hafnium disulfide layers. A nanopore is formed through the graphene layers and the dielectric layers. The graphene layers are individually addressed by applying individual voltages to each of the graphene layers on a one to one basis when a particular base of a molecule is in the nanopore. Each of the graphene layers is an electrode. Individual electrical currents are measured for each of the graphene layers as the particular base moves from a first graphene layer through a last graphene layer in the nanopore. The base is identified according to the individual electrical currents repeatedly measured for the base moving from the first through last graphene layer in the nanopore.Type: ApplicationFiled: August 20, 2013Publication date: January 29, 2015Applicant: International Business Machines CorporationInventor: Wenjuan Zhu
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Patent number: 8901680Abstract: Semiconductor nano pressure sensor devices having graphene membrane suspended over cavities formed in a semiconductor substrate. A suspended graphene membrane serves as an active electro-mechanical membrane for sensing pressure, which can be made very thin, from about one atomic layer to about 10 atomic layers in thickness, to improve the sensitivity and reliability of a semiconductor pressure sensor device.Type: GrantFiled: April 12, 2012Date of Patent: December 2, 2014Assignee: International Business Machines CorporationInventors: Jin Cai, Yanqing Wu, Wenjuan Zhu
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Patent number: 8852985Abstract: Semiconductor nano pressure sensor devices having graphene membrane suspended over open cavities formed in a semiconductor substrate. A suspended graphene membrane serves as an active electro-mechanical membrane for sensing pressure, which can be made very thin, from about one atomic layer to about 10 atomic layers in thickness, to improve the sensitivity and reliability of a semiconductor pressure sensor device.Type: GrantFiled: August 31, 2012Date of Patent: October 7, 2014Assignee: International Business Machines CorporationInventors: Jin Cai, Yanqing Wu, Wenjuan Zhu
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Patent number: 8748871Abstract: A three-dimensional integrated circuit includes a semiconductor device, an insulator formed on the semiconductor device, an interconnect formed in the insulator, and a graphene device formed on the insulator.Type: GrantFiled: January 18, 2012Date of Patent: June 10, 2014Assignee: International Business Machines CorporationInventors: Phaedon Avouris, Josephine B. Chang, Wilfried E. Haensch, Fei Liu, Zihong Liu, Yanqing Wu, Wenjuan Zhu
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Patent number: 8735242Abstract: A method of forming a semiconductor device includes forming a field-effect transistor (FET), and forming a fuse which includes a graphene layer and is electrically connected to the FET.Type: GrantFiled: July 31, 2012Date of Patent: May 27, 2014Assignee: International Business Machines CorporationInventor: Wenjuan Zhu
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GRAPHENE TRANSISTOR GATED BY CHARGES THROUGH A NANOPORE FOR BIO-MOLECULAR SENSING AND DNA SEQUENCING
Publication number: 20140141521Abstract: A technique for a nanodevice is provided. A reservoir is separated into two parts by a membrane. A nanopore is formed through the membrane, and the nanopore connects the two parts of the reservoir. The nanopore and the two parts of the reservoir are filled with ionic buffer. The membrane includes a graphene layer and insulating layers. The graphene layer is wired to first and second metal pads to form a graphene transistor in which transistor current flowing through the graphene transistor is modulated by charges or dipoles passing through the nanopore.Type: ApplicationFiled: January 24, 2014Publication date: May 22, 2014Applicant: International Business Machines CorporationInventors: Hongbo Peng, Gustavo A. Stolovitzky, Wenjuan Zhu