Patents by Inventor David Allen Roberts

David Allen Roberts 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: 6500499
    Abstract: Complex mixed metal containing thin films can be deposited by CVD from liquid mixtures of metal complexes without solvent by direct liquid injection and by other precursor dispersing method such as aerosol delivery with subsequent annealing to improve electrical properties of the deposited films. This process has potential for commercial success in microelectronics device fabrication of dielectrics, ferroelectrics, barrier metals/electrodes, superconductors, catalysts, and protective coatings. Application of this process, particularly the CVD of ZrSnTiOx (zirconium tin titanate, or ZTT) and HfSnTiOx (hafnium tin titanate, or HTT) thin films has been studied successfully.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: December 31, 2002
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Yoshihide Senzaki, Arthur Kenneth Hochberg, David Allen Roberts, John Anthony Thomas Norman, Glenn Baldwin Alers, Robert McLemore Fleming
  • Publication number: 20020184945
    Abstract: A container for high purity chemicals having an externally placed level sensor to avoid contamination of such chemical and for ready serviceability and a removeable liquid out diptube to facilitate cleaning during refilling or refurbishing, both of which are situated adjacent a sump in the bottom of the container. The container can have a valved inlet and outlet and can be constructed of stainless steel which is electropolished.
    Type: Application
    Filed: June 7, 2001
    Publication date: December 12, 2002
    Inventors: Geoffrey L. Chase, John Eric Baker, Lee Senecal, Robert Sam Zorich, David Allen Roberts
  • Publication number: 20020108670
    Abstract: A container for high purity chemicals having an externally placed level sensor to avoid contamination of such chemical and for ready serviceability and a removeable liquid out diptube to facilitate cleaning during refilling or refurbishing. The container can have a valved inlet and outlet and can be constructed of stainless steel which is electropolished.
    Type: Application
    Filed: February 12, 2001
    Publication date: August 15, 2002
    Inventors: John Eric Baker, Lee Senecal, Robert Sam Zorich, David Allen Roberts
  • Publication number: 20020013487
    Abstract: This invention is directed to a group of novel homologous eight membered ring compounds having a metal, such as copper, reversibly bound in the ring and containing carbon, nitrogen, silicon and/or other metals.
    Type: Application
    Filed: February 22, 2001
    Publication date: January 31, 2002
    Inventors: John Anthony Thomas Norman, David Allen Roberts, Morteza Farnia
  • Publication number: 20020006759
    Abstract: A prewetted cleaning wipe for cleaning surfaces and having low volatile organic chemical and low nonvolatile residue properties comprising a wipe substrate wetted with an aqueous solution of high purity water and an effective amount of an acetylenic alcohol surface active agent. The surface active agent is preferably an acetylenic diol. Preferred acetylenic diols include dimethyl octynediol and tetramethyl decynediol.
    Type: Application
    Filed: May 3, 2001
    Publication date: January 17, 2002
    Inventors: David Allen Roberts, John Anthony Marsella, Robert Edward Stevens
  • Patent number: 6238734
    Abstract: The present invention is a composition for deposition of a mixed metal or metal compound layer, comprising a solventless mixture of at least two metal-ligand complex precursors, wherein the mixture is liquid at ambient conditions and the ligands are the same and are selected from the group consisting of alkyls, alkoxides, halides, hydrides, amides, imides, azides cyclopentadienyls, carbonyls, and their fluorine, oxygen and nitrogen substituted analogs.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: May 29, 2001
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Yoshihide Senzaki, David Allen Roberts, John Anthony Thomas Norman
  • Patent number: 6096913
    Abstract: In a process for the synthesis of a first metal-ligand complex, M.sup.+n (L.sup.-).sub.n, where n.gtoreq.1, from a metal compound precursor and a ligand precursor, where the metal of the metal compound precursor may during the synthesis change to a valence in excess of n; the improvement, to suppress formation of a second metal-ligand complex of the metal with a valence in excess of n, of adding the elemental form of the metal to the synthesis of the first metal-ligand complex.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: August 1, 2000
    Assignee: Air Products and Chemicals, Inc.
    Inventors: John Anthony Thomas Norman, Yoshihide Senzaki, David Allen Roberts
  • Patent number: 5976991
    Abstract: A process for the chemical vapor deposition of silicon dioxide and silicon oxynitride from reactant gases O.sub.2, O.sub.3, N.sub.2 O, NO, NO.sub.2, NH.sub.3 and a silane of the formula: (t-C.sub.4 H.sub.9 NH).sub.2 SiH.sub.2. A process whereby a stack of silicon containing dielectrics ranging from silicon nitride to silicon oxide may be deposited successively (at the same pressure and temperature) by changing the reactants O.sub.2, O.sub.3, N.sub.2 O, NO, NO.sub.2, NH.sub.3 while maintaing a constant flow of (t-C.sub.4 H.sub.9 NH).sub.2 SiH.sub.2. The films are suitable for use in the semiconductor and related industries.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: November 2, 1999
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Ravi Kumar Laxman, David Allen Roberts, Arthur Kenneth Hochberg
  • Patent number: 5874368
    Abstract: A process for the low pressure chemical vapor deposition of silicon nitride from ammonia and a silane of the formula: (t-C.sub.4 H.sub.9 NH).sub.2 SiH.sub.2 provides improved properties of the resulting film for use in the semiconductor industry.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: February 23, 1999
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Ravi Kumar Laxman, David Allen Roberts, Arthur Kenneth Hochberg, Herman Gene Hockenhull, Felicia Diane Kaminsky