Patents by Inventor J. Leon Shohet

J. Leon Shohet 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).

  • Publication number: 20230375474
    Abstract: The present disclosure provides systems and methods for characterizing the interaction of free radicals with various materials and the use of known interactions to isolate free radical generation from free radical interaction with a target molecule.
    Type: Application
    Filed: February 27, 2023
    Publication date: November 23, 2023
    Inventors: J. Leon Shohet, Michael R. Sussman, Faraz A. Choudhury, Benjamin B. Minkoff, Grzegorz Sabat, Joshua M. Blatz
  • Publication number: 20230061431
    Abstract: This disclosure provides methods, systems, and compositions of matter for studying solvent accessibility and three-dimensional structure of biological molecules. A plasma can be used to generate marker radicals, which can interact with a biological molecule and mark the solvent-accessible portions of the biological molecule.
    Type: Application
    Filed: April 8, 2022
    Publication date: March 2, 2023
    Applicant: Wisconsin Alumni Research Foundation
    Inventors: Michael R. Sussman, J. Leon Shohet, Faraz A. Choudhury, Joshua M. Blatz, Benjamin B. Minkoff, Daniel I. Benjamin
  • Patent number: 11592394
    Abstract: The present disclosure provides systems and methods for characterizing the interaction of free radicals with various materials and the use of known interactions to isolate free radical generation from free radical interaction with a target molecule.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: February 28, 2023
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: J. Leon Shohet, Michael R. Sussman, Faraz A. Choudhury, Benjamin B. Minkoff, Grzegorz Sabat, Joshua M. Blatz
  • Patent number: 11300562
    Abstract: This disclosure provides methods, systems, and compositions of matter for studying solvent accessibility and three-dimensional structure of biological molecules. A plasma can be used to generate marker radicals, which can interact with a biological molecule and mark the solvent-accessible portions of the biological molecule.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: April 12, 2022
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Michael R. Sussman, J. Leon Shohet, Faraz A. Choudhury, Joshua M. Blatz, Benjamin B. Minkoff, Daniel I. Benjamin
  • Publication number: 20200150106
    Abstract: This disclosure provides methods, systems, and compositions of matter for studying solvent accessibility and three-dimensional structure of biological molecules. A plasma can be used to generate marker radicals, which can interact with a biological molecule and mark the solvent-accessible portions of the biological molecule.
    Type: Application
    Filed: January 16, 2020
    Publication date: May 14, 2020
    Applicant: Wisconsin Alumni Research Foundation
    Inventors: Michael R. Sussman, J. Leon Shohet, Faraz A. Choudhury, Joshua M. Blatz, Benjamin B. Minkoff, Daniel I. Benjamin
  • Patent number: 10571460
    Abstract: This disclosure provides methods, systems, and compositions of matter for studying solvent accessibility and three-dimensional structure of biological molecules. A plasma can be used to generate marker radicals, which can interact with a biological molecule and mark the solvent-accessible portions of the biological molecule.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: February 25, 2020
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Michael R. Sussman, J. Leon Shohet, Faraz A. Choudhury, Joshua M. Blatz, Benjamin B. Minkoff, Daniel I. Benjamin
  • Patent number: 10090150
    Abstract: A method of forming a low dielectric constant (low-k) dielectric is disclosed. The method includes providing a substrate and forming a dielectric including porogens over the substrate. While subjecting the dielectric to a first pressure, the dielectric is exposed to ultraviolet (UV) radiation. The dielectric is also subject to a second pressure less than 1×10?3 Torr. While subjecting the dielectric to the second pressure, the dielectric is exposed to vacuum UV (VUV) radiation having one or more photon energies greater than 7 eV. Since it is difficult for VUV radiation to travel through a medium at a pressure greater than 10 Torr without being absorbed by intermittent materials, subjecting the dielectric to the second pressure creates a medium wherein the dielectric can be exposed to the VUV radiation. By exposing the dielectric to UV and VUV radiation, the dielectric can achieve a reduced dielectric constant and increased mechanical properties.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: October 2, 2018
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: J. Leon Shohet, Huifeng Zheng, Xiangyu Guo, Weiyi Li, Joshua Blatz, Dongfei Pei
  • Publication number: 20180068848
    Abstract: A method of forming a low dielectric constant (low-k) dielectric is disclosed. The method includes providing a substrate and forming a dielectric including porogens over the substrate. While subjecting the dielectric to a first pressure, the dielectric is exposed to ultraviolet (UV) radiation. The dielectric is also subject to a second pressure less than 1×10?3 Torr. While subjecting the dielectric to the second pressure, the dielectric is exposed to vacuum UV (VUV) radiation having one or more photon energies greater than 7 eV. Since it is difficult for VUV radiation to travel through a medium at a pressure greater than 10 Torr without being absorbed by intermittent materials, subjecting the dielectric to the second pressure creates a medium wherein the dielectric can be exposed to the VUV radiation. By exposing the dielectric to UV and VUV radiation, the dielectric can achieve a reduced dielectric constant and increased mechanical properties.
    Type: Application
    Filed: September 6, 2017
    Publication date: March 8, 2018
    Inventors: J. Leon Shohet, Huifeng Zheng, Xiangyu Guo, Weiyi Li, Joshua Blatz, Dongfei Pei
  • Publication number: 20180045645
    Abstract: The present disclosure provides systems and methods for characterizing the interaction of free radicals with various materials and the use of known interactions to isolate free radical generation from free radical interaction with a target molecule.
    Type: Application
    Filed: August 14, 2017
    Publication date: February 15, 2018
    Inventors: J. Leon Shohet, Michael R. Sussman, Faraz A. Choudhury, Benjamin B. Minkoff, Grzegorz Sabat, Joshua M. Blatz
  • Publication number: 20170336390
    Abstract: This disclosure provides methods, systems, and compositions of matter for studying solvent accessibility and three-dimensional structure of biological molecules. A plasma can be used to generate marker radicals, which can interact with a biological molecule and mark the solvent-accessible portions of the biological molecule.
    Type: Application
    Filed: May 19, 2017
    Publication date: November 23, 2017
    Inventors: Michael R. Sussman, J. Leon Shohet, Faraz A. Choudhury, Joshua M. Blatz, Benjamin B. Minkoff, Daniel I. Benjamin
  • Patent number: 6440756
    Abstract: A method and apparatus for reducing plasma-induced charging damage in a semiconducting device are provided. The method includes exposing an article having a dielectric material susceptible to plasma-induced charging, to vacuum-ultraviolet (VUV) radiation of an energy greater than the bandgap energy of the dielectric material during or after plasma processing of the device. The plasma-induced charge is conducted from, or recombined at, the charging site.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: August 27, 2002
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: J. Leon Shohet, Cristian Cismaru, Francesco Cerrina
  • Publication number: 20010041375
    Abstract: A method and apparatus for reducing plasma-induced charging damage in a semiconducting device are provided. The method includes exposing an article having a dielectric material susceptible to plasma-induced charging, to vacuum-ultraviolet (VUV) radiation of an energy greater than the bandgap energy of the dielectric material during or after plasma processing of the device. The plasma-induced charge is conducted from, or recombined at, the charging site.
    Type: Application
    Filed: December 13, 2000
    Publication date: November 15, 2001
    Inventors: J. Leon Shohet, Cristian Cismaru, Francesco Cerrina
  • Patent number: 5661043
    Abstract: A method and apparatus for forming a buried insulator layer, typically a silicon dioxide layer, includes using plasma source ion implantation to uniformly implant ions into exposed regions of a semiconductor wafer. A silicon-on-insulator (SOI) structure is formed by an anneal step before fabricating an integrated circuit into the thin semiconductor layer above the buried insulator layer.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: August 26, 1997
    Inventors: Paul Rissman, James B. Kruger, J. Leon Shohet
  • Patent number: 5604038
    Abstract: Liquid phase polymers deposited upon a substrate are cross-linked in the presence of a non-polymer-forming gas plasma to produce solid polymer coatings having improved chemical, thermal, and mechanical properties. The properties of the polymer layers formed in the method may be exploited by producing microelectronic circuitry, optical materials, and barrier coatings for a variety of substrate materials.
    Type: Grant
    Filed: November 18, 1994
    Date of Patent: February 18, 1997
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Ferencz S. Denes, Raymond A. Young, Abdolmajid Sarmadi, J. Leon Shohet
  • Patent number: 4909164
    Abstract: A hazardou waste incinerator which utilizes a cyclotron resonance plasma. The plasma is generated by introducing vaporized hazardous material and a feed gas into a vacuum chamber. The chamber has a magnetic field source and an electromagnetic radiation source. The cyclotron resonance plasma is produced by the resonance that occurs when the frequency of the electromagnetic radiation is set equal to that of the gyration of electrons or other charged particles in the magnetic field according to the formula: F.sub.res =(1/2.pi.)(qB/m) hertz Where q is the charge of the electron or ion, B is the strength of the magnetic field and m is the mass of the electron or ion. The strength of the electromagnetic radiation is adjusted so that the flowing gases are ionized, forming a plasma. During the reaction, the charged particles collide with neutral particles, providing both ionization and fragmentation (the breaking up of high-mass molecules into lower mass fragments).
    Type: Grant
    Filed: December 8, 1988
    Date of Patent: March 20, 1990
    Inventors: J. Leon Shohet, David T. Anderson