Patents by Inventor Padraic Shafer

Padraic Shafer 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: 6960306
    Abstract: In a method of fabricating a metallization structure during formation of a microelectronic device, the improvement of reducing metal shorts in blanket metal deposition layers later subjected to reactive ion etching, comprising: a) depositing on a first underlayer, a blanket of an aluminum compound containing an electrical short reducing amount of an alloy metal in electrical contact with the underlayer; b) depositing a photoresist and exposing and developing to leave patterns of photoresist on the blanket aluminum compound containing an electrical short reducing amount of an alloy metal; and c) reactive ion etching to obtain an aluminum compound containing an alloy metal line characterized by reduced shorts in amounts less than the aluminum compound without said short reducing amount of alloy metal.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: November 1, 2005
    Assignees: Infineon Technologies AG, International Business Machines Corporation
    Inventors: Roy C. Iggulden, Padraic Shafer, Kwong Hon (Keith) Wong, Michael M. Iwatake, Jay W. Strane, Thomas Goebel, Donna D. Miura, Chet Dziobkowski, Werner Robl, Brian Hughes
  • Patent number: 6936512
    Abstract: Disclosed herein is a method, in an integrated, of forming a high-K node dielectric of a trench capacitor and a trench sidewall device dielectric at the same time. The method includes forming a trench in a single crystal layer of a semiconductor substrate, and forming an isolation collar along a portion of the trench sidewall, wherein the collar has a top below the top of the trench in the single crystal layer. Then, at the same time, a high-K dielectric is formed along the trench sidewall, the high-K dielectric extending in both an upper portion of the trench including above the isolation collar and in a lower portion of the trench below the isolation collar.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: August 30, 2005
    Assignee: International Business Machines Corporation
    Inventors: Michael P. Chudzik, Rajarao Jammy, Carl John Radens, Kenneth T. Settlemyer, Jr., Padraic Shafer, Joseph F. Shepard, Jr.
  • Publication number: 20050179112
    Abstract: Isolation trenches and capacitor trenches containing vertical FETs (or any prior levels p-n junctions or dissimilar material interfaces) having an aspect ratio up to 60 are filled with a process comprising: applying a spin-on material based on silazane and having a low molecular weight; pre-baking the applied material in an oxygen ambient at a temperature below about 450 deg C.; converting the stress in the material by heating at an intermediate temperature between 450 deg C. and 800 deg C. in an H20 ambient; and heating again at an elevated temperature in an O2 ambient, resulting in a material that is stable up to 1000 deg C., has a compressive stress that may be tuned by variation of the process parameters, has an etch rate comparable to oxide dielectric formed by HDP techniques, and is durable enough to withstand CMP polishing.
    Type: Application
    Filed: January 12, 2005
    Publication date: August 18, 2005
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael Belyansky, Rama Divakaruni, Laertis Economikos, Rajarao Jammy, Kenneth Settlemyer, Padraic Shafer
  • Publication number: 20040155268
    Abstract: Methods and apparatus in accordance with the present invention may employ a layer of tungsten nitride having a ratio of nitrogen to tungsten that is below about 0.7 at and a layer of tungsten formed on the layer of tungsten nitride to obtain a conductive material.
    Type: Application
    Filed: February 6, 2003
    Publication date: August 12, 2004
    Applicants: Infineon Technologies North America Corp., International Business Machines Corporation
    Inventors: Werner Robl, Roy Iggulden, Padraic Shafer, Keith Kwong Hon Wong
  • Patent number: 6734097
    Abstract: A method of filling a damascene structure with liner and W characterized by improved resistance and resistance spread and adequate adhesion comprising: a given damascene structure coated by a liner which purposely provides poor step coverage into the afore mentioned structure, followed by a CVD W deposition, and followed by a metal isolation technique.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: May 11, 2004
    Assignees: Infineon Technologies AG, International Business Machines Corporation
    Inventors: Roy C. Iggulden, Padraic Shafer, Werner Robl, Kwong Hon Wong
  • Publication number: 20040063277
    Abstract: Disclosed herein is a method, in an integrated, of forming a high-K node dielectric of a trench capacitor and a trench sidewall device dielectric at the same time. The method includes forming a trench in a single crystal layer of a semiconductor substrate, and forming an isolation collar along a portion of the trench sidewall, wherein the collar has a top below the top of the trench in the single crystal layer. Then, at the same time, a high-K dielectric is formed along the trench sidewall, the high-K dielectric extending in both an upper portion of the trench including above the isolation collar and in a lower portion of the trench below the isolation collar.
    Type: Application
    Filed: September 27, 2002
    Publication date: April 1, 2004
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Michael P. Chudzik, Rajarao Jammy, Carl John Radens, Kenneth T. Settlemyer, Padraic Shafer, Joseph F. Shepard
  • Publication number: 20040020891
    Abstract: In a method of fabricating a metallization structure during formation of a microelectronic device, the improvement of reducing metal shorts in blanket metal deposition layers later subjected to reactive ion etching, comprising:
    Type: Application
    Filed: July 31, 2002
    Publication date: February 5, 2004
    Applicants: Infineon Technologies North America Corp., International Business Machines Corporation or ITR, LP; IT AG; UMC, etc.
    Inventors: Roy C. Iggulden, Padraic Shafer, Kwong Hon Wong, Michael M. Iwatake, Jay W. Strane, Thomas Goebel, Donna D. Miura, Chet Dziobkowski, Wemer Robl, Brian Hughes
  • Publication number: 20030068894
    Abstract: A method of filling a damascene structure with liner and W characterized by improved resistance and resistance spread and adequate adhesion comprising: a given damascene structure coated by a liner which purposely provides poor step coverage into the afore mentioned structure, followed by a CVD W deposition, and followed by a metal isolation technique.
    Type: Application
    Filed: September 28, 2001
    Publication date: April 10, 2003
    Applicant: Infineon Technologies North America Corp.
    Inventors: Roy C. Iggulden, Padraic Shafer, Werner Robl, Kwong Hon Wong