Patents by Inventor Paul M. Campbell
Paul M. Campbell 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: 11841338Abstract: Optical and electronic detection of chemicals, and particularly strong electron-donors, by 2H to 1T phase-based transition metal dichalcogenide (TMD) films, detection apparatus incorporating the TMD films, methods for forming the detection apparatus, and detection systems and methods based on the TMD films are provided. The detection apparatus includes a 2H phase TMD film that transitions to the 1T phase under exposure to strong electron donors. After exposure, the phase state can be determined to assess whether all or a portion of the TMD has undergone a transition from the 2H phase to the 1T phase. Following detection, TMD films in the 1T phase can be converted back to the 2H phase, resulting in a reusable chemical sensor that is selective for strong electron donors.Type: GrantFiled: September 25, 2020Date of Patent: December 12, 2023Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Adam L. Friedman, F. Keith Perkins, James C. Culbertson, Aubrey T. Hanbicki, Paul M. Campbell
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Publication number: 20210080419Abstract: Optical and electronic detection of chemicals, and particularly strong electron-donors, by 2H to 1T phase-based transition metal dichalcogenide (TMD) films, detection apparatus incorporating the TMD films, methods for forming the detection apparatus, and detection systems and methods based on the TMD films are provided. The detection apparatus includes a 2H phase TMD film that transitions to the 1T phase under exposure to strong electron donors. After exposure, the phase state can be determined to assess whether all or a portion of the TMD has undergone a transition from the 2H phase to the 1T phase. Following detection, TMD films in the 1T phase can be converted back to the 2H phase, resulting in a reusable chemical sensor that is selective for strong electron donors.Type: ApplicationFiled: September 25, 2020Publication date: March 18, 2021Applicant: The Government of the United States of America, as Represented by the Secretary of the NavyInventors: Adam L. Friedman, F. Keith Perkins, James C. Culbertson, Aubrey T. Hanbicki, Paul M. Campbell
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Patent number: 10801987Abstract: Optical and electronic detection of chemicals, and particularly strong electron-donors, by 2H to 1T phase-based transition metal dichalcogenide (TMD) films, detection apparatus incorporating the TMD films, methods for forming the detection apparatus, and detection systems and methods based on the TMD films are provided. The detection apparatus includes a 2H phase TMD film that transitions to the 1T phase under exposure to strong electron donors. After exposure, the phase state can be determined to assess whether all or a portion of the TMD has undergone a transition from the 2H phase to the 1T phase. Following detection, TMD films in the 1T phase can be converted back to the 2H phase, resulting in a reusable chemical sensor that is selective for strong electron donors.Type: GrantFiled: July 18, 2017Date of Patent: October 13, 2020Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Adam L. Friedman, F. Keith Perkins, James C. Culbertson, Aubrey T. Hanbicki, Paul M. Campbell
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Publication number: 20190389727Abstract: A method of forming a carbon microtube includes providing a wire substrate in a heated furnace, contacting a surface of the wire substrate in the heated furnace with a reducing gas, forming a carbon microtube on the wire substrate by chemical vapor deposition of a carbon precursor in the heated furnace, and removing the carbon microtube, on the wire substrate, from the furnace.Type: ApplicationFiled: June 21, 2019Publication date: December 26, 2019Inventors: F. Keith Perkins, Ignacio Perez De Leon, Paul M. Campbell, Adam L. Friedman, Erin Cleveland
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Patent number: 10436744Abstract: A method of making a low dimensional material chemical vapor sensor comprising providing a monolayer of a transition metal dichalcogenide, applying the monolayer to a substrate, applying a PMMA film, defining trenches, and placing the device in a n-butyl lithium (nbl) bath. A low dimensional material chemical vapor sensor comprising a monolayer of a transition metal dichalcogenide, the monolayer applied to a substrate, a region or regions of the transition metal dichalcogenide that have been treated with n-butyl lithium, the region or regions of the transition metal dichalcogenide that have been treated with n-butyl lithium have transitioned from a semiconducting to metallic phase, metal contacts on the region or regions of the transition metal dichalcogenide that have been treated with the n-butyl lithium.Type: GrantFiled: April 4, 2017Date of Patent: October 8, 2019Assignee: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Adam L. Friedman, F. Keith Perkins, James C. Culbertson, Aubrey T. Hanbicki, Paul M. Campbell
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Publication number: 20180024085Abstract: Optical and electronic detection of chemicals, and particularly strong electron-donors, by 2H to 1T phase-based transition metal dichalcogenide (TMD) films, detection apparatus incorporating the TMD films, methods for forming the detection apparatus, and detection systems and methods based on the TMD films are provided. The detection apparatus includes a 2H phase TMD film that transitions to the 1T phase under exposure to strong electron donors. After exposure, the phase state can be determined to assess whether all or a portion of the TMD has undergone a transition from the 2H phase to the 1T phase. Following detection, TMD films in the 1T phase can be converted back to the 2H phase, resulting in a reusable chemical sensor that is selective for strong electron donors.Type: ApplicationFiled: July 18, 2017Publication date: January 25, 2018Applicant: The Government of the United States of America, as Represented by the Secretary of the NavyInventors: Adam L. Friedman, F. Keith Perkins, James C. Culbertson, Aubrey T. Hanbicki, Paul M. Campbell
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Publication number: 20170299544Abstract: A method of making a low dimensional material chemical vapor sensor comprising providing a monolayer of a transition metal dichalcogenide, applying the monolayer to a substrate, applying a PMMA film, defining trenches, and placing the device in a n-butyl lithium (nbl) bath. A low dimensional material chemical vapor sensor comprising a monolayer of a transition metal dichalcogenide, the monolayer applied to a substrate, a region or regions of the transition metal dichalcogenide that have been treated with n-butyl lithium, the region or regions of the transition metal dichalcogenide that have been treated with n-butyl lithium have transitioned from a semiconducting to metallic phase, metal contacts on the region or regions of the transition metal dichalcogenide that have been treated with the n-butyl lithium.Type: ApplicationFiled: April 4, 2017Publication date: October 19, 2017Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Adam L. Friedman, F. Keith Perkins, James C. Culbertson, Aubrey T. Hanbicki, Paul M. Campbell
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Patent number: 9785735Abstract: A system and method perform global routing during integrated circuit fabrication. The method includes performing a design change in a portion of an integrated circuit design using a processor, determining whether the design change requires rerouting, and requesting a global routing lock based on determining that the design change requires the rerouting. The method also includes a router providing control of the global routing lock to one of two or more of the threads that request the global routing lock, and performing global routing for all of the two or more of the threads in parallel. A physical implementation of the integrated circuit design is obtained.Type: GrantFiled: October 11, 2016Date of Patent: October 10, 2017Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Paul M. Campbell, Nathaniel D. Hieter, Douglas Keller, Adam P. Matheny, Alexander J. Suess
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Patent number: 9063063Abstract: A method of making a low-dimensional material chemical vapor sensor comprising exfoliating MoS2, applying the monolayer flakes of MoS2 onto a SiO2/Si wafer, applying a methylmethacrylate (MMA)/polymethylmethacrylate (PMMA) film, defining trenches for the deposition of metal contacts, and depositing one of Ti/Au, Au, and Pt in the trench and resulting in a MoS2 sensor. A low-dimensional material chemical vapor sensor comprising monolayer flakes of MoS2, trenches in the SiO2/Si wafer, metal contacts in the trenches, and thereby resulting in a MoS2 sensor. A full spectrum sensing suite comprising similarly fabricated parallel sensors made from a variety of low-dimensional materials including graphene, carbon nanotubes, MoS2, BN, and the family of transition metal dichalcogenides. The sensing suites are small, robust, sensitive, low-power, inexpensive, and fast in their response to chemical vapor analytes.Type: GrantFiled: November 8, 2013Date of Patent: June 23, 2015Assignee: The United States of America, as represented by the Secretary of the NavyInventors: Adam L. Friedman, F. Keith Perkins, Enrique Cobas, Paul M Campbell, Glenn G. Jernigan, Berend T Jonker
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Publication number: 20140273259Abstract: A method of making a low-dimensional material chemical vapor sensor comprising exfoliating MoS2, applying the monolayer flakes of MoS2 onto a SiO2/Si wafer, applying a methylmethacrylate (MMA)/polymethylmethacrylate (PMMA) film, defining trenches for the deposition of metal contacts, and depositing one of Ti/Au, Au, and Pt in the trench and resulting in a MoS2 sensor. A low-dimensional material chemical vapor sensor comprising monolayer flakes of MoS2, trenches in the SiO2/Si wafer, metal contacts in the trenches, and thereby resulting in a MoS2 sensor. A full spectrum sensing suite comprising similarly fabricated parallel sensors made from a variety of low-dimensional materials including graphene, carbon nanotubes, MoS2, BN, and the family of transition metal dichalcogenides. The sensing suites are small, robust, sensitive, low-power, inexpensive, and fast in their response to chemical vapor analytes.Type: ApplicationFiled: November 8, 2013Publication date: September 18, 2014Applicant: The Government of the United States of America, as represented by the Secretary of the NavyInventors: Adam L. Friedman, F. Keith Perkins, Enrique Cobas, Paul M. Campbell, Glenn G. Jernigan, Berend T. Jonker
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Patent number: 7225421Abstract: A method, system and program product are described for generating a clock distribution network on an integrated circuit by determining an allowable placement region for each of a set of clock tree leaf elements in the integrated circuit. This allowable placement region is generated by determining and intersecting a set of sub-regions under different constraints, each of which identifies an area in which the clock tree leaf element is placed to satisfy the respective constraint. Constraints for which sub-regions are determined include timing constraints in the form of slacks and congestion constraints. After allowable placement regions have been determined, the clock tree leaf elements are clustered, and each clock tree leaf element is placed at a location within its allowable placement region which minimizes some cost function for that clustering.Type: GrantFiled: January 28, 2005Date of Patent: May 29, 2007Assignee: International Business Machines CorporationInventors: William R. Migatz, Paul M. Campbell, David J. Hathaway, David S. Kung, Ruchir Puri, Louise H. Trevillyan
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Patent number: 6918284Abstract: An electronic device having an interconnected network of carbon nanotubes on the surface of a substrate, and two or more electrical leads. The network forms an electrical connection between the leads.Type: GrantFiled: September 8, 2003Date of Patent: July 19, 2005Assignee: The United States of America as represented by the Secretary of the NavyInventors: Eric S. Snow, Jamie P. Novak, Paul M. Campbell
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Publication number: 20040192072Abstract: An electronic device having an interconnected network of carbon nanotubes on the surface of a substrate, and two or more electrical leads. The network forms an electrical connection between the leads.Type: ApplicationFiled: September 8, 2003Publication date: September 30, 2004Inventors: Eric S. Snow, Jamie P. Novak, Paul M. Campbell