Patents by Inventor Randall S. Urdahl

Randall S. Urdahl 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: 7812307
    Abstract: Aspects of the invention include sample ionizing devices and methods of use thereof. Embodiments of the sample ionizing devices include a microplasma generation source with a plasma generation region, a sample input port for delivering a sample to the plasma generation region, and a gas flow element configured to flow gas through the microplasma generation source independently of the sample input port. The devices and methods of the invention find use in a variety of different applications, including analyte detection applications.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: October 12, 2010
    Assignee: Agilent Technologies, Inc.
    Inventors: David T. Dutton, Randall S. Urdahl, Arthur Schleifer, Karen L. Seward
  • Patent number: 6677254
    Abstract: The formation of a barrier layer over a high k dielectric layer and deposition of a conducting layer over the barrier layer prevents intermigration between the species of the high k dielectric layer and the conducting layer and prevents oxygen scavenging of the high k dielectric layer. One example of a capacitor stack device provided includes a high k dielectric layer of Ta2O5, a barrier layer of TaON or TiON formed at least in part by a remote plasma process, and a top electrode of TiN. The processes may be conducted at about 300 to 700° C. and are thus useful for low thermal budget applications. Also provided are MIM capacitor constructions and methods in which an insulator layer is formed by remote plasma oxidation of a bottom electrode.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: January 13, 2004
    Assignee: Applied Materials, Inc.
    Inventors: Pravin Narwankar, Mouloud Bakli, Ravi Rajagopalan, Randall S. Urdahl, Asher Sinensky, Shankarram Athreya
  • Patent number: 6573150
    Abstract: The present invention provides a method of integrating tantalum oxide into an MIM capacitor for a semiconductor device, comprising the step of vapor-depositing the tantalum oxide from an oxygen-free liquid precursor and under process conditions comprising a deposition temperature of less than about 500° C. and a deposition pressure of less than about 96 Torr, wherein the tantalum oxide is integrated into the MIM capacitor. Also provided is a method of forming an MIM capacitor comprising the step of integrating a tantalum oxide dielectric film with a tantalum nitride or a titanium nitride bottom electrode deposited on a substrate and a titanium nitride top electrode thereby forming an MIM capacitor.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: June 3, 2003
    Assignee: Applied Materials, Inc.
    Inventors: Randall S. Urdahl, Pravin K. Narwankar, Shankarrram A. Athreya, Asher K. Sinensky, Andrea M. Mendoza
  • Publication number: 20030025146
    Abstract: The formation of a barrier layer over a high k dielectric layer and deposition of a conducting layer over the barrier layer prevents intermigration between the species of the high k dielectric layer and the conducting layer and prevents oxygen scavenging of the high k dielectric layer. One example of a capacitor stack device provided includes a high k dielectric layer of Ta2O5, a barrier layer of TaON or TiON formed at least in part by a remote plasma process, and a top electrode of TiN. The processes may be conducted at about 300 to 700° C. and are thus useful for low thermal budget applications. Also provided are MIM capacitor constructions and methods in which an insulator layer is formed by remote plasma oxidation of a bottom electrode.
    Type: Application
    Filed: July 23, 2001
    Publication date: February 6, 2003
    Inventors: Pravin Narwankar, Mouloud Bakli, Ravi Rajagopalan, Randall S. Urdahl, Asher Sinensky, Shankarram Athreya
  • Patent number: 6387761
    Abstract: A method for improving the interface between a silicon nitride film and a silicon surface is described. According to the present invention a silicon nitride film is formed on a silicon surface of a substrate. While said substrate is heated the silicon nitride film is exposed to an ambient comprising hydrogen (H2). In a prefered embodiment of the present invention the ambient comprises H2 and N2.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: May 14, 2002
    Assignees: Applied Materials, Inc., Vanguard Semiconductor, Ltd.
    Inventors: Wong-Cheng Shih, Pravin K. Narwankar, Randall S. Urdahl, Turgut Sahin
  • Publication number: 20020009861
    Abstract: A method and apparatus for forming and annealing a dielectric layer. According to the present invention an active atomic species is generated in a first chamber. A dielectric layer formed on a substrate is then exposed to the active atomic species in a second chamber, wherein the second chamber is remote from the first chamber.
    Type: Application
    Filed: June 12, 1998
    Publication date: January 24, 2002
    Inventors: PRAVIN K. NARWANKAR, TURGUT SAHIN, RANDALL S. URDAHL, ANKINEEDU VELAGA, PATRICIA LIU
  • Patent number: 6218300
    Abstract: A method and apparatus for forming a titanium doped tantalum pentaoxide dielectric using a CVD process. According to the present invention a substrate is placed in the deposition chamber. A source of tantalum, a source of titanium, and an oxygen containing gas are then fed into the chamber. Thermal energy is used to decompose the source of tantalum to form tantalum atoms, and decompose the source of titanium to form titanium atoms in the deposition chamber. The titanium atoms, tantalum atoms and the oxygen containing gas then react to form a tantalum pentaoxide dielectric film doped with titanium.
    Type: Grant
    Filed: June 12, 1998
    Date of Patent: April 17, 2001
    Assignee: Applied Materials, Inc.
    Inventors: Pravin K. Narwankar, Turgut Sahin, Randall S. Urdahl, Ankineedu Velaga, Patricia Liu
  • Patent number: 6037235
    Abstract: A method for improving the interface between a silicon nitride film and a silicon surface is described. According to the present invention a silicon nitride film is formed on a silicon surface of a substrate. While said substrate is heated the silicon nitride film is exposed to an ambient comprising hydrogen (H.sub.2). In a prefered embodiment of the present invention the ambient comprises H.sub.2 and N.sub.2.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: March 14, 2000
    Assignee: Applied Materials, Inc.
    Inventors: Pravin K. Narwankar, Randall S. Urdahl, Turgut Sahin, Wong-Cheng Shih