Patents by Inventor Stephen M. Rossnagel

Stephen M. Rossnagel 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: 8003319
    Abstract: Techniques for controlling the position of a charged polymer inside a nanopore are provided. For example, one technique includes using electrostatic control to position a linear charged polymer inside a nanopore, and creating an electrostatic potential well inside the nanopore, wherein the electrostatic potential well controls a position of the linear charged polymer inside the nanopore.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: August 23, 2011
    Assignee: International Business Machines Corporation
    Inventors: Stanislav Polonsky, Stephen M. Rossnagel, Gustavo A. Stolovitzky
  • Publication number: 20110201204
    Abstract: Methods are provided for fabricating devices. A first layer is formed. A hardmask on the first layer is formed. Features on the hardmask are patterned. The sizes of features on the hardmask are reduced by applying a plasma treatment process to form reduced size features. Also, the size of features on the hardmask can be enlarged to form enlarged size features by applying the plasma treatment process and/or removing the oxidized part of the feature during plasma treatment process. Another method may include a first layer formed on a substrate and a second layer formed on the first layer. First features are patterned on the first layer, and second features are patterned on the second layer. A size of second features on the second layer is closed due to the different oxidation rate of the two layers during the plasma treatment process, to form a self-sealed channel and/or self-buried trench.
    Type: Application
    Filed: February 12, 2010
    Publication date: August 18, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Hongbo Peng, Stephen M. Rossnagel, Katherine L. Saenger
  • Patent number: 7998842
    Abstract: The present invention provides metallic films containing a Group IVB or VB metal, silicon and optionally nitrogen by utilizing atomic layer deposition (ALD). In particularly, the present invention provides a low temperature thermal ALD method of forming metallic silicides and a plasma-enhanced atomic layer deposition (PE-ALD) method of forming metallic silicon nitride film. The methods of the present invention are capable of forming metallic films having a thickness of a monolayer or less on the surface of a substrate. The metallic films provided in the present invention can be used for contact metallization, metal gates or as a diffusion barrier.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: August 16, 2011
    Assignee: International Business Machines Corporation
    Inventors: Cyril Cabral, Jr., Hyungjun Kim, Stephen M. Rossnagel
  • Publication number: 20110193045
    Abstract: Techniques for forming a phase change memory cell. An example method includes forming a bottom electrode within a substrate. The method includes forming a phase change layer above the bottom electrode. The method includes forming a capping layer and an insulator layer. The method includes crystallizing the phase change material in the phase change layer so that the phase change layer is void free. The method further comprises heating the phase change material in the phase change layer from the bottom electrode and as a result the phase change layer is crystallized from the bottom to the top. In one embodiment, a rapid thermal anneal (RTA) is applied for crystallizing the phase change material.
    Type: Application
    Filed: February 9, 2010
    Publication date: August 11, 2011
    Applicant: International Business Machines Corporation
    Inventors: Alejandro G. Schrott, Chung H. Lam, Stephen M. Rossnagel
  • Publication number: 20110188172
    Abstract: A capacitor includes a plurality of nanochannels formed in a dielectric material. A conductive film is formed over interior surfaces of the nanochannels, and a charge barrier is formed over the conductive film. An electrolytic solution is disposed in the nanochannels. An electrode is coupled to the electrolytic solution in the nanochannels to form the capacitor.
    Type: Application
    Filed: February 3, 2010
    Publication date: August 4, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Richard A. Haight, Stephen M. Rossnagel
  • Publication number: 20110168560
    Abstract: A filter includes a membrane having a plurality of nanochannels formed therein. Functionalized nanoparticles are deposited through self assembly onto surfaces defining the nanochannels so as to decrease the final diameter of the membrane. Methods for making and using the filter are also provided.
    Type: Application
    Filed: January 12, 2010
    Publication date: July 14, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ali Afzali-Ardakani, Stephen M. Rossnagel
  • Patent number: 7960808
    Abstract: A reversible fuse structure in an integrated circuit is obtained through the implementation of a fuse cell having a short thin line of phase change materials in contact with via and line structures capable of passing current through the line of phase change material (fuse cell). The current is passed through the fuse cell in order to change the material from a less resistive material to a more resistive material through heating the phase change material in the crystalline state to the melting point then quickly quenching the material into the amorphous state. The reversible programming is achieved by passing a lower current through the fuse cell to convert the high resistivity amorphous material to a lower resistivity crystalline material. Appropriate sense-circuitry is integrated to read the information stored in the fuses, wherein said sense circuitry is used to enable or disable circuitry.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: June 14, 2011
    Assignee: International Business Machines Corporation
    Inventors: Geoffrey W. Burr, Chandrasekharan Kothandaraman, Chung Hon Lam, Xiao Hu Liu, Stephen M. Rossnagel, Christy S. Tyberg, Robert L. Wisnieff
  • Patent number: 7956463
    Abstract: An interconnect structure having reduced electrical resistance and a method of forming such an interconnect structure are provided. The interconnect structure includes a dielectric material including at least one opening therein. The at least one opening is filled with an optional barrier diffusion layer, a grain growth promotion layer, an agglomerated plating seed layer, an optional second plating seed layer a conductive structure. The conductive structure which includes a metal-containing conductive material, typically Cu, has a bamboo microstructure and an average grain size of larger than 0.05 microns. In some embodiments, the conductive structure includes conductive grains that have a (111) crystal orientation.
    Type: Grant
    Filed: September 16, 2009
    Date of Patent: June 7, 2011
    Assignee: International Business Machines Corporation
    Inventors: Chih-Chao Yang, Daniel C. Edelstein, Takeshi Nogami, Stephen M. Rossnagel
  • Publication number: 20110127438
    Abstract: A system for determining an amount of radiation includes a dosimeter configured to receive the amount of radiation, the dosimeter comprising a circuit having a resonant frequency, such that the resonant frequency of the circuit changes according to the amount of radiation received by the dosimeter, the dosimeter further configured to absorb RF energy at the resonant frequency of the circuit; a radio frequency (RF) transmitter configured to transmit the RF energy at the resonant frequency to the dosimeter; and a receiver configured to determine the resonant frequency of the dosimeter based on the absorbed RF energy, wherein the amount of radiation is determined based on the resonant frequency.
    Type: Application
    Filed: November 30, 2009
    Publication date: June 2, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Cyril Cabral, JR., Michael S. Gordon, Steven J. Koester, Conal E. Murray, Kenneth P. Rodbell, Stephen M. Rossnagel, Robert L. Wisnieff, Jeng-bang Yau
  • Patent number: 7951708
    Abstract: A method of forming a diffusion barrier for use in semiconductor device manufacturing includes depositing, by a physical vapor deposition (PVD) process, an iridium doped, tantalum based barrier layer over a patterned interlevel dielectric (ILD) layer, wherein the barrier layer is deposited with an iridium concentration of at least 60 atomic % such that the barrier layer has a resulting amorphous structure.
    Type: Grant
    Filed: June 3, 2009
    Date of Patent: May 31, 2011
    Assignee: International Business Machines Corporation
    Inventors: Patrick W. DeHaven, Daniel C. Edelstein, Philip L. Flaitz, Takeshi Nogami, Stephen M. Rossnagel, Chih-Chao Yang
  • Publication number: 20110094884
    Abstract: A filter includes a membrane having a plurality of nanochannels formed therein. A first surface charge material is deposited on an end portion of the nanochannels. The first surface charge material includes a surface charge to electrostatically influence ions in an electrolytic solution such that the nanochannels reflect ions back into the electrolytic solution while passing a fluid of the electrolytic solution. Methods for making and using the filter are also provided.
    Type: Application
    Filed: October 28, 2009
    Publication date: April 28, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: John M. Cotte, Christopher V. Jahnes, Hongbo Peng, Stephen M. Rossnagel
  • Publication number: 20110062587
    Abstract: An interconnect structure having reduced electrical resistance and a method of forming such an interconnect structure are provided. The interconnect structure includes a dielectric material including at least one opening therein. The at least one opening is filled with an optional barrier diffusion layer, a grain growth promotion layer, an agglomerated plating seed layer, an optional second plating seed layer a conductive structure. The conductive structure which includes a metal-containing conductive material, typically Cu, has a bamboo microstructure and an average grain size of larger than 0.05 microns. In some embodiments, the conductive structure includes conductive grains that have a (111) crystal orientation.
    Type: Application
    Filed: September 16, 2009
    Publication date: March 17, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Chih-Chao Yang, Daniel C. Edelstein, Takeshi Nogami, Stephen M. Rossnagel
  • Patent number: 7901980
    Abstract: A memory cell and a method of making the same, that includes insulating material deposited on a substrate, a bottom electrode formed within the insulating material, a plurality of insulating layers deposited above the bottom electrode and at least one of which acts as an intermediate insulating layer. Then defining a via in the insulating layers above the intermediate insulating layer, creating a channel for etch with a step spacer, defining a pore in the intermediate insulating layer, removing all insulating layers above the intermediate insulating layer, filling the entirety of the pore with phase change material, and forming an upper electrode above the phase change material. Additionally, the formation of bit line connections with the upper electrode.
    Type: Grant
    Filed: August 7, 2009
    Date of Patent: March 8, 2011
    Assignee: International Business Machines Corporation
    Inventors: Roger W. Cheek, Chung H. Lam, Stephen M. Rossnagel, Alejandro G. Schrott
  • Publication number: 20100311236
    Abstract: A method of forming a diffusion barrier for use in semiconductor device manufacturing includes depositing, by a physical vapor deposition (PVD) process, an iridium doped, tantalum based barrier layer over a patterned interlevel dielectric (ILD) layer, wherein the barrier layer is deposited with an iridium concentration of at least 60% by atomic weight such that the barrier layer has a resulting amorphous structure.
    Type: Application
    Filed: June 3, 2009
    Publication date: December 9, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Patrick W. DeHaven, Daniel C. Edelstein, Philip L. Flaitz, Takeshi Nogami, Stephen M. Rossnagel, Chih-Chao Yang
  • Publication number: 20100264396
    Abstract: An electrode structure and a method for manufacturing an integrated circuit electrode includes forming a bottom electrode comprising a pipe-shaped member, filled with a conductive material such as n-doped silicon, and having a ring-shaped top surface. A disc-shaped insulating member is formed on the top of the pipe-shaped member by oxidizing the conductive fill. A layer of programmable resistance material, such as a phase change material, is deposited in contact with the top surface of the pipe-shaped member. A top electrode in contact with the layer of programmable resistance material.
    Type: Application
    Filed: April 20, 2009
    Publication date: October 21, 2010
    Applicants: Macronix International Co., Ltd., International Business Machines Corporation
    Inventors: Hsiang-Lan Lung, Shih-Hung Chen, Stephen M. Rossnagel
  • Patent number: 7749898
    Abstract: A method for forming an interconnect structure includes forming a dielectric layer above a first layer having a conductive region defined therein. An opening is defined in the dielectric layer to expose at least a portion of the conductive region. A metal silicide is formed in the opening to define the interconnect structure. A semiconductor device includes a first layer having a conductive region defined therein, a dielectric layer formed above the first layer, and a metal silicide interconnect structure extending through the dielectric layer to communicate with the conductive region.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: July 6, 2010
    Assignee: Globalfoundries Inc.
    Inventors: Paul R. Besser, Christian Lavoie, Cyril Cabral, Jr., Stephen M. Rossnagel, Kenneth P. Rodbell
  • Publication number: 20100025249
    Abstract: Techniques for controlling the position of a charged polymer inside a nanopore are provided. For example, one technique includes using electrostatic control to position a linear charged polymer inside a nanopore, and creating an electrostatic potential well inside the nanopore, wherein the electrostatic potential well controls a position of the linear charged polymer inside the nanopore.
    Type: Application
    Filed: August 13, 2009
    Publication date: February 4, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Stanislav Polonsky, Stephen M. Rossnagel, Gustavo A. Stolovitzky
  • Publication number: 20090315182
    Abstract: A method for forming an interconnect structure includes forming a dielectric layer above a first layer having a conductive region defined therein. An opening is defined in the dielectric layer to expose at least a portion of the conductive region. A metal silicide is formed in the opening to define the interconnect structure. A semiconductor device includes a first layer having a conductive region defined therein, a dielectric layer formed above the first layer, and a metal silicide interconnect structure extending through the dielectric layer to communicate with the conductive region.
    Type: Application
    Filed: June 24, 2008
    Publication date: December 24, 2009
    Inventors: Paul R. Besser, Christian Lavoie, Cyril Cabral, JR., Stephen M. Rossnagel, Kenneth P. Rodbell
  • Publication number: 20090302474
    Abstract: The present invention relates to a very thin multilayer diffusion barrier for a semiconductor device and fabrication method thereof. The multilayer diffusion barrier according to the present invention is fabricated by forming a very thin, multilayer diffusion barrier composed of even thinner sub-layers, where the sub-layers are only a few atoms thick. The present invention provides a diffusion barrier layer for a semiconductor device which is in a substantially amorphous state and thermodynamically stable, even at high temperatures.
    Type: Application
    Filed: August 13, 2009
    Publication date: December 10, 2009
    Inventors: Katayun Barmak, Hyungjun Kim, Ismail C. Noyan, Stephen M. Rossnagel
  • Publication number: 20090298223
    Abstract: A memory cell and a method of making the same, that includes insulating material deposited on a substrate, a bottom electrode formed within the insulating material, a plurality of insulating layers deposited above the bottom electrode and at least one of which acts as an intermediate insulating layer. Then defining a via in the insulating layers above the intermediate insulating layer, creating a channel for etch with a step spacer, defining a pore in the intermediate insulating layer, removing all insulating layers above the intermediate insulating layer, filling the entirety of the pore with phase change material, and forming an upper electrode above the phase change material. Additionally, the formation of bit line connections with the upper electrode.
    Type: Application
    Filed: August 7, 2009
    Publication date: December 3, 2009
    Applicant: International Business Machines Corporation
    Inventors: Roger W. Cheek, Chung H. Lam, Stephen M. Rossnagel, Alejandro G. Schrott