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).
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Patent number: 7919409Abstract: We have used the state-of-the-art computational chemistry techniques to identify adhesion promoting layer materials that provide good adhesion of copper seed layer to the adhesion promoting layer and the adhesion promoting layer to the barrier layer. We have identified factors responsible for providing good adhesion of copper layer on various metallic surfaces and circumstances under which agglomeration of copper film occur. Several promising adhesion promoting layer materials based on chromium alloys have been predicted to be able to significantly enhance the adhesion of copper films. Chromium containing complexes of a polydentate ?-ketoiminate have been identified as chromium containing precursors to make the alloys with chromium.Type: GrantFiled: August 15, 2008Date of Patent: April 5, 2011Assignee: Air Products and Chemicals, Inc.Inventors: Hansong Cheng, Xinjian Lei, Daniel P. Spence, John Anthony Thomas Norman, David Allen Roberts, Bo Han, Chenggang Zhou, Jinping Wu
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Publication number: 20100038785Abstract: We have used the state-of-the-art computational chemistry techniques to identify adhesion promoting layer materials that provide good adhesion of copper seed layer to the adhesion promoting layer and the adhesion promoting layer to the barrier layer. We have identified factors responsible for providing good adhesion of copper layer on various metallic surfaces and circumstances under which agglomeration of copper film occur. Several promising adhesion promoting layer materials based on chromium alloys have been predicted to be able to significantly enhance the adhesion of copper films. Chromium containing complexes of a polydentate ?-ketoiminate have been identified as chromium containing precursors to make the alloys with chromium.Type: ApplicationFiled: August 15, 2008Publication date: February 18, 2010Applicant: AIR PRODUCTS AND CHEMICALS, INC.Inventors: Hansong Cheng, Xinjian Lei, Daniel P. Spence, John Anthony Thomas Norman, David Allen Roberts, Bo Han, Chenggang Zhou, Jinping Wu
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Patent number: 7662959Abstract: A compound having the structure: w-A-x-CY—Z(CF3), where CY is cyclohexane or substituted cyclohexane, exemplified by 4-trifluoromethyl-4-methylcarboxy-4?-propyl-1,1?-(bi)cyclohexane.Type: GrantFiled: January 7, 2008Date of Patent: February 16, 2010Assignee: Air Products and Chemicals, Inc.Inventors: Gauri Sankar Lal, Michael Ulman, David Allen Roberts, Wade Hampton Bailey, William Franklin Burgoyne
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Publication number: 20080188690Abstract: A compound having the structure: w-A-x-CY-Z(CF3), where CY is cyclohexane or substituted cyclohexane, exemplified by 4-trifluoromethyl-4-methylcarboxy-4?-propyl-1,1?-(bi)cyclohexane.Type: ApplicationFiled: January 7, 2008Publication date: August 7, 2008Applicant: AIR PRODUCTS AND CHEMICALS, INC.Inventors: GAURI SANKAR LAL, MICHAEL ULMAN, DAVID ALLEN ROBERTS, WADE HAMPTON BAILEY, WILLIAM FRANKLIN BURGOYNE
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Publication number: 20070193026Abstract: This invention is directed to a method of forming electrical conductors comprised of conductive metals generally carried on a substrate. In the method, a conductor formulation generally comprised of metal particles or metal precursor or mixture thereof, typically in the form of an ink or paste, is applied to the substrate and converted into a conductive metal by application of sufficient heat and for a sufficient time to effect sintering thereof while in the presence of a negatively charged ionic reducing gas.Type: ApplicationFiled: July 6, 2006Publication date: August 23, 2007Inventors: Chun Christine Dong, Eugene Joseph Karwacki, Richard E. Patrick, David Allen Roberts, Robert Krantz Pinschmidt, John Anthony Thomas Norman, John Christopher Ivankovits
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Patent number: 7119032Abstract: This invention relates to apparatus and a method to protect the internal components of semiconductor processing equipment such as a plasma reactor or a reactive species generator against physical and/or chemical damages during etching and/or cleaning processes. Layered superlattice materials having three or more metal elements such as strontium bismuth tantalate (SBT) are used to form a protective barrier on the surfaces of the internal components of a reaction chamber.Type: GrantFiled: August 23, 2004Date of Patent: October 10, 2006Assignee: Air Products and Chemicals, Inc.Inventors: Bing Ji, Stephen Andrew Motika, Dingjun Wu, Eugene Joseph Karwacki, Jr., David Allen Roberts
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Patent number: 7078358Abstract: 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: GrantFiled: May 3, 2001Date of Patent: July 18, 2006Assignee: Air Products and Chemicals, Inc.Inventors: David Allen Roberts, John Anthony Marsella, Robert Edward Stevens
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Patent number: 6913029Abstract: A process and apparatus to deliver both process chemical and solvent for cleaning the process chemical in a solvent purge refill system along with an integral solvent sorption module, in a single “assembly” that permits ease of shipping, minimal end-user interaction, sufficient solvent for the solvent purge operation, without residual solvent, requiring disposal. This eliminates customer handling of the solvent, and eliminates the customer's need to find a solvent waste facility, as residual solvent can be returned in the same package in one piece/one step.Type: GrantFiled: September 15, 2004Date of Patent: July 5, 2005Assignee: Air Products and Chemicals, Inc.Inventors: Robert Sam Zorich, David Allen Roberts, George Oleg Voloshin
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Patent number: 6869876Abstract: In the present invention, a metal halide film is grown which is then reduced to the metal film rather than growing the metal film directly on the substrate surface. In certain embodiments, a metal halide film is grown from at least two precursors: a halogen-containing precursor and a metal-containing precursor. The metal halide film is then exposed to a reducing agent to form the metal film. In certain preferred embodiments, the metal halide film is exposed to the reducing agent prior to the completion of the growing step.Type: GrantFiled: December 20, 2002Date of Patent: March 22, 2005Assignee: Air Products and Chemicals, Inc.Inventors: John Anthony Thomas Norman, David Allen Roberts, Melanie Anne Boze
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Patent number: 6840252Abstract: A process and apparatus to deliver both process chemical and solvent for cleaning the process chemical in a solvent purge refill system along with an integral solvent sorption module, in a single “assembly” that permits ease of shipping, minimal end-user interaction, sufficient solvent for the solvent purge operation, without residual solvent, requiring disposal. This eliminates customer handling of the solvent, and eliminates the customer's need to find a solvent waste facility, as residual solvent can be returned in the same package in one piece/one step.Type: GrantFiled: July 17, 2003Date of Patent: January 11, 2005Assignee: Air Products and Chemicals, Inc.Inventors: Robert Sam Zorich, David Allen Roberts, George Oleg Voloshin
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Patent number: 6837251Abstract: A process and apparatus to deliver both process chemical and solvent for cleaning the process chemical in a solvent purge refill system along with an integral solvent sorption module, in a single “assembly” that permits ease of shipping, minimal end-user interaction, sufficient solvent for the solvent purge operation, without residual solvent, requiring disposal. This eliminates customer handling of the solvent, and eliminates the customer's need to find a solvent waste facility, as residual solvent can be returned in the same package in one piece/one step.Type: GrantFiled: September 29, 2000Date of Patent: January 4, 2005Assignee: Air Products and Chemicals, Inc.Inventors: Robert Sam Zorich, David Allen Roberts, George Oleg Voloshin
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Patent number: 6818783Abstract: 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. A structural representation of the compounds of this invention is shown below: wherein M and M′ are each a metal such as Cu, Ag, Au and Ir; X and X′ can be N or O; Y and Y′ can be Si, C; Sn, Ge, Al, or B; and Z and Z′ can be C, N, or O. Substituents represented by R1, R2, R3, R4, R5, R6, R1′, R2′, R3′, R4′, R5′, and R6′ will vary depending on the ring atom to which they are attached. This invention is also directed to depositing metal and metal-containing films on a substrate, under ALD or CVD conditions, using the above novel compounds as precursors.Type: GrantFiled: December 19, 2002Date of Patent: November 16, 2004Assignee: Air Products and Chemicals, Inc.Inventors: John Anthony Thomas Norman, David Allen Roberts, Morteza Farnia, Melanie Anne Boze
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Patent number: 6770254Abstract: This invention relates to an improved process for removing trace levels of Group IVb contaminants from a Group IVb metal tetrahalide of and particularly to a process for removing zirconium tetrachloride from titanium tetrachloride. The improvement resides in contacting a titanium tetrachloride feedstock containing trace impurities of zirconium tetrachloride or hafnium tetrachloride with a sufficient amount of titanium hydride to convert any zirconium tetrachloride or hafnium tetrachloride to a lower volatile compound. The resultant mixture is distilled and the titanium tetrachloride separated from the lower volatile zirconium or hafnium compounds.Type: GrantFiled: January 17, 2002Date of Patent: August 3, 2004Assignee: Air Products and Chemicals, Inc.Inventors: Heather Regina Bowen, David Allen Roberts
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Publication number: 20040087143Abstract: In the present invention, a metal halide film is grown which is then reduced to the metal film rather than growing the metal film directly on the substrate surface. In certain embodiments, a metal halide film is grown from at two precursors: a halogen-containing precursor and a metal-containing precursor. The metal halide film is then exposed to a reducing agent to form the metal film. In certain preferred embodiments, the metal halide film is exposed to the reducing agent prior to the completion of the growing step.Type: ApplicationFiled: December 20, 2002Publication date: May 6, 2004Inventors: John Anthony Thomas Norman, David Allen Roberts, Melanie Anne Boze
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Publication number: 20040028569Abstract: A process and apparatus to deliver both process chemical and solvent for cleaning the process chemical in a solvent purge refill system along with an integral solvent sorption module, in a single “assembly” that permits ease of shipping, minimal end-user interaction, sufficient solvent for the solvent purge operation, without residual solvent, requiring disposal. This eliminates customer handling of the solvent, and eliminates the customer's need to find a solvent waste facility, as residual solvent can be returned in the same package in one piece/one step.Type: ApplicationFiled: July 17, 2003Publication date: February 12, 2004Inventors: Robert Sam Zorich, David Allen Roberts, George Oleg Voloshin
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Publication number: 20030133861Abstract: This invention relates to an improved process for removing trace levels of Group IVb contaminants from a Group IVb metal tetrahalide of and particularly to a process for removing zirconium tetrachloride from titanium tetrachloride. The improvement resides in contacting a titanium tetrachloride feedstock containing trace impurities of zirconium tetrachloride or hafnium tetrachloride with a sufficient amount of titanium hydride to convert any zirconium tetrachloride or hafnium tetrachloride to a lower volatile compound. The resultant mixture is distilled and the titanium tetrachloride separated from the lower volatile zirconium or hafnium compounds.Type: ApplicationFiled: January 17, 2002Publication date: July 17, 2003Inventors: Heather Regina Bowen, David Allen Roberts
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Publication number: 20030135061Abstract: 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: ApplicationFiled: December 19, 2002Publication date: July 17, 2003Inventors: John Anthony Thomas Norman, David Allen Roberts, Morteza Farnia, Melanie Anne Boze
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Patent number: 6534666Abstract: This invention relates to an improvement in a purification process for producing those liquid copper based complexes of &bgr;-diketones and, particularly the monovalent copper complexes of &bgr;-diketones, which are suited for application by chemical vapor deposition in the electronics industry. In the basic process for preparing a copper based complex, a reactive copper compound is reacted with a fluorinated &bgr;-diketonate and an organo source such as an olefinic source or one having acetylenic unsaturation. Purification is effected by contacting reaction product with a double deionized deoxygenated water source and preferably an acid/water source. An aqueous layer and an organic layer are formed with the aqueous layer containing byproducts and the organic phase containing product.Type: GrantFiled: December 27, 2001Date of Patent: March 18, 2003Assignee: Air Products and Chemicals, Inc.Inventors: Robert Sam Zorich, James Richard Thurmond, David Allen Roberts
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Patent number: 6526824Abstract: 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: GrantFiled: June 7, 2001Date of Patent: March 4, 2003Assignee: Air Products and Chemicals, Inc.Inventors: Geoffrey L. Chase, John Eric Baker, Lee Senecal, Robert Sam Zorich, David Allen Roberts
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Patent number: 6503561Abstract: 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: GrantFiled: April 10, 2000Date of Patent: January 7, 2003Assignee: Air Products and Chemicals, Inc.Inventors: Yoshihide Senzaki, David Allen Roberts, John Anthony Thomas Norman, Arthur Kenneth Hochberg