Patents by Inventor Vishal Gauri

Vishal Gauri 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: 9257302
    Abstract: Provided are methods of filling gaps on a substrate by creating flowable silicon oxide-containing films. The methods involve introducing vapor-phase silicon-containing precursor and oxidant reactants into a reaction chamber containing the substrate under conditions such that a condensed flowable film is formed on the substrate. The flowable film at least partially fills gaps on the substrate. In certain embodiments, the methods involve using a catalyst in the formation of the film. The catalyst may be incorporated into one of the reactants and/or introduced as a separate reactant.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: February 9, 2016
    Assignee: Novellus Systems, Inc.
    Inventors: Feng Wang, Brian Lu, Nerissa Draeger, Vishal Gauri, Raashina Humayun, Michal Danek, Bart van Schravendijk, Lakshminarayana Nittala
  • Patent number: 8809161
    Abstract: Methods of this invention relate to filling gaps on substrates with a solid dielectric material by forming a flowable film in the gap. The flowable film provides consistent, void-free gap fill. The film is then converted to a solid dielectric material. In this manner gaps on the substrate are filled with a solid dielectric material. According to various embodiments, the methods involve reacting a dielectric precursor with an oxidant to form the dielectric material. In certain embodiments, the dielectric precursor condenses and subsequently reacts with the oxidant to form dielectric material. In certain embodiments, vapor phase reactants react to form a condensed flowable film.
    Type: Grant
    Filed: July 3, 2013
    Date of Patent: August 19, 2014
    Assignee: Novellus Systems, Inc.
    Inventors: Vishal Gauri, Raashina Humayun, Chi-I Lang, Judy H. Huang, Michael Barnes, Sunil Shanker
  • Publication number: 20140017904
    Abstract: Methods of this invention relate to filling gaps on substrates with a solid dielectric material by forming a flowable film in the gap. The flowable film provides consistent, void-free gap fill. The film is then converted to a solid dielectric material. In this manner gaps on the substrate are filled with a solid dielectric material. According to various embodiments, the methods involve reacting a dielectric precursor with an oxidant to form the dielectric material. In certain embodiments, the dielectric precursor condenses and subsequently reacts with the oxidant to form dielectric material. In certain embodiments, vapor phase reactants react to form a condensed flowable film.
    Type: Application
    Filed: July 3, 2013
    Publication date: January 16, 2014
    Inventors: Vishal GAURI, Raashina HUMAYUN, Chi-I LANG, Judy H. HUANG, Michael BARNES, Sunil SHANKER
  • Patent number: 8481403
    Abstract: Methods of this invention relate to filling gaps on substrates with a solid dielectric material by forming a flowable film in the gap. The flowable film provides consistent, void-free gap fill. The film is then converted to a solid dielectric material. In this manner gaps on the substrate are filled with a solid dielectric material. According to various embodiments, the methods involve reacting a dielectric precursor with an oxidant to form the dielectric material. In certain embodiments, the dielectric precursor condenses and subsequently reacts with the oxidant to form dielectric material. In certain embodiments, vapor phase reactants react to form a condensed flowable film.
    Type: Grant
    Filed: January 4, 2011
    Date of Patent: July 9, 2013
    Assignee: Novellus Systems, Inc.
    Inventors: Vishal Gauri, Raashina Humayun, Chi-I Lang, Judy H. Huang, Michael Barnes, Sunil Shanker
  • Patent number: 7888233
    Abstract: Methods of this invention relate to filling gaps on substrates with a solid dielectric material by forming a flowable film in the gap. The flowable film provides consistent, void-free gap fill. The film is then converted to a solid dielectric material. In this manner gaps on the substrate are filled with a solid dielectric material. According to various embodiments, the methods involve reacting a dielectric precursor with an oxidant to form the dielectric material. In certain embodiments, the dielectric precursor condenses and subsequently reacts with the oxidant to form dielectric material. In certain embodiments, vapor phase reactants react to form a condensed flowable film.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: February 15, 2011
    Assignee: Novellus Systems, Inc.
    Inventors: Vishal Gauri, Raashina Humayun, Chi-I Lang, Judy H. Huang, Michael Barnes, Sunil Shanker
  • Patent number: 7524735
    Abstract: Methods of this invention relate to filling gaps on substrates with a solid dielectric material by forming a flowable film in the gap. The flowable film provides consistent, void-free gap fill. The film is then converted to a solid dielectric material. In this manner gaps on the substrate are filled with a solid dielectric material. According to various embodiments, the methods involve reacting a dielectric precursor with an oxidant to form the dielectric material. In certain embodiments, the dielectric precursor condenses and subsequently reacts with the oxidant to form dielectric material. In certain embodiments, vapor phase reactants react to form a condensed flowable film.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: April 28, 2009
    Assignee: Novellus Systems, Inc
    Inventors: Vishal Gauri, Raashina Humayun, Chi-I Lang, Judy H. Huang, Michael Barnes, Sunil Shanker
  • Patent number: 7217658
    Abstract: High density plasma chemical vapor deposition and etch back processes fill high aspect ratio gaps without liner erosion or further underlying structure attack. The characteristics of the deposition process are modulated such that the deposition component of the process initially dominates the sputter component of the process. For example, reactive gasses are introduced in a gradient fashion into the HDP reactor and introduction of bias power onto the substrate is delayed and gradually increased or reactor pressure is decreased. In the case of a multi-step etch enhanced gap fill process, the invention may involve gradually modulating deposition and etch components during transitions between process steps. By carefully controlling the transitions between process steps, including the introduction of reactive species into the HDP reactor and the application of source and bias power onto the substrate, structure erosion is prevented.
    Type: Grant
    Filed: September 7, 2004
    Date of Patent: May 15, 2007
    Assignee: Novellus Systems, Inc.
    Inventors: Atiye Bayman, George D. Papasouliotis, Yong Ling, Weijie Zhang, Vishal Gauri, Mayasari Lim
  • Patent number: 7122485
    Abstract: Disclosed are methods for modifying the topography of HDP CVD films by modifying the composition of the reactive mixture. The methods allow for deposition profile control independent of film deposition rate. They rely on changes in the process chemistry of the HDP CVD system, rather than hardware modifications, to modify the local deposition rates on the wafer. The invention provides methods of modifying the film profile by altering the composition of the reactive gas mixture, in particular the hydrogen content. In this manner, deposition profile and wiw uniformity are decoupled from deposition rate, and can be controlled without hardware modifications.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: October 17, 2006
    Assignee: Novellus Systems, Inc.
    Inventors: George D. Papasouliotis, Edith Goldner, Vishal Gauri, Md Sazzadur Rahman, Vikram Singh
  • Patent number: 7078312
    Abstract: Plasma etch processes incorporating etch chemistries which include hydrogen. In particular, high density plasma chemical vapor deposition-etch-deposition processes incorporating etch chemistries which include hydrogen that can effectively fill high aspect ratio (typically at least 3:1, for example 6:1, and up to 10:1 or higher), narrow width (typically sub 0.13 micron, for example 0.1 micron or less) gaps while reducing or eliminating chamber loading and redeposition and improving wafer-to-wafer uniformity relative to conventional deposition-etch-deposition processes which do not incorporate hydrogen in their etch chemistries.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: July 18, 2006
    Assignee: Novellus Systems, Inc.
    Inventors: Siswanto Sutanto, Wenxian Zhu, Waikit Fung, Mayasari Lim, Vishal Gauri, George D. Papasouliotis
  • Patent number: 7074690
    Abstract: Methods for selectively depositing a solid material on a substrate having gaps of dimension on the order of about 100 nm or less are disclosed. The methods involve exposing the substrate to a precursor of a solid material, such that the precursor forms liquid regions in at least some of the gaps, followed by exposing the substrate to conditions that evaporate the liquid precursor from regions outside the gaps but maintain at least some of the liquid regions in the gaps. The liquid precursor remaining in the gaps is then converted to solid material, thereby selectively filling the gaps with the material.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: July 11, 2006
    Assignee: Novellus Systems, Inc.
    Inventors: Vishal Gauri, Raashina Humayun
  • Patent number: 7067440
    Abstract: Chemical vapor deposition processes are employed to fill high aspect ratio (typically at least 3:1), narrow width (typically 1.5 microns or less and even sub 0.15 micron) gaps with significantly reduced incidence of voids or weak spots. This deposition process involves the use of hydrogen as a process gas in the reactive mixture of a plasma containing CVD reactor. The process gas also includes dielectric forming precursor molecules such as silicon and oxygen containing molecules.
    Type: Grant
    Filed: July 13, 2004
    Date of Patent: June 27, 2006
    Assignee: Novellus Systems, Inc.
    Inventors: Atiye Bayman, Md Sazzadur Rahman, Weijie Zhang, Bart van Schravendijk, Vishal Gauri, George D. Papasouliotis, Vikram Singh
  • Patent number: 6867086
    Abstract: High density plasma chemical vapor deposition and etch back processes that can fill high aspect ratio (typically at least 5:1, for example 6:1), narrow width (typically sub 0.13 micron, for example 0.1 micron or less) gaps with significantly reduced incidence of voids or weak spots are provided. This deposition part of the process may involve the use of any suitable high density plasma chemical vapor deposition (HDP CVD) chemistry. The etch back part of the process involves an integrated multi-step (for example, two-step) procedure including an anisotropic dry etch followed by an isotropic dry etch. The all dry deposition and etch back process in a single tool increases throughput and reduces handling of wafers resulting in more efficient and higher quality gap fill operations.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: March 15, 2005
    Assignee: Novellus Systems, Inc.
    Inventors: David Chen, Robert A. Shepherd, Jr., Vishal Gauri, George D. Papasouliotis
  • Patent number: 6846745
    Abstract: Chemical vapor deposition processes are employed to fill high aspect ratio (typically at least 3:1), narrow width (typically 1.5 microns or less and even sub 0.15 micron) gaps with significantly reduced incidence of voids or weak spots. This deposition process involves the use of both hydrogen and fluorine as process gases in the reactive mixture of a plasma-containing CVD reactor. The process gas also includes dielectric forming precursors such as silicon and oxygen-containing molecules.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: January 25, 2005
    Assignee: Novellus Systems, Inc.
    Inventors: George D. Papasouliotis, Vishal Gauri, Raihan M. Tarafdar, Vikram Singh
  • Patent number: 6787483
    Abstract: Chemical vapor deposition processes are employed to fill high aspect ratio (typically at least 3:1), narrow width (typically 1.5 microns or less and even sub 0.15 micron) gaps with significantly reduced incidence of voids or weak spots. This deposition process involves the use of hydrogen as a process gas in the reactive mixture of a plasma containing CVD reactor. The process gas also includes dielectric forming precursor molecules such as silicon and oxygen containing molecules.
    Type: Grant
    Filed: May 20, 2003
    Date of Patent: September 7, 2004
    Assignee: Novellus Systems, Inc.
    Inventors: Atiye Bayman, Md Sazzadur Rahman, Weijie Zhang, Bart van Schravendijk, Vishal Gauri, George D. Papasoulitotis, Vikram Singh
  • Publication number: 20040168470
    Abstract: A method for forming single element arc tubes is provided. The method includes the use of the lost foam process in combination with ceramic forming processes. First, a polymeric material (20) is formed to define the internal dimensions. The outer dimensions are established with an external mold (40), followed by filling the mold with a suspension (60) that hardens. The outer mold is removed and the part is debindered to melt and remove the inner foam shape, followed by sintering to form a substantially transparent ceramic arc tube (70).
    Type: Application
    Filed: April 12, 2004
    Publication date: September 2, 2004
    Inventors: Curtis E. Scott, Douglas G. Seredich, Daniel Polis, Vishal Gauri, Karthik Sivaraman
  • Patent number: 6715498
    Abstract: A supercritical process vessel with an interior for holding a supercritical fluid is provided. A wafer support for supporting a wafer within the interior of a supercritical process vessel to expose the wafer to the supercritical fluid is provided. A lamp, which is able to operate at supercritical fluid pressures within the interior of the supercritical process vessel is provided.
    Type: Grant
    Filed: September 6, 2002
    Date of Patent: April 6, 2004
    Assignee: Novellus Systems, Inc.
    Inventors: Raashina Humayun, Patrick Christopher Joyce, Vishal Gauri, Adrianne Kay Tipton
  • Patent number: 6596654
    Abstract: Chemical vapor deposition processes are employed to fill high aspect ratio (typically at least 3:1), narrow width (typically 1.5 microns or less and even sub 0.15 micron) gaps with significantly reduced incidence of voids or weak spots. This deposition process involves the use of hydrogen as a process gas in the reactive mixture of a plasma containing CVD reactor. The process gas also includes dielectric forming precursor molecules such as silicon and oxygen containing molecules.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: July 22, 2003
    Assignee: Novellus Systems, Inc.
    Inventors: Atiye Bayman, Md Sazzadur Rahman, Weijie Zhang, Bart van Schravendijk, Vishal Gauri, George D. Papasoulitotis, Vikram Singh
  • Patent number: 6592695
    Abstract: A binder system for forming a ceramic body, such as a translucent arc tube for a metal halide lamp, comprises a hydrocarbon, such as a paraffin wax, a copolymer, such as poly (ethylene-co-vinyl acetate), and optionally a surfactant. The binder system is mixed with a ceramic powder and heated to above the melting point of the binder. The heated mixture is formed into a compact having the general shape of the finished ceramic body and then cooled or allowed to cool. The hydrocarbon and copolymer have overlapping freezing points so that when the shaped compact cools, crystalline segments of the copolymer (such as ethylene segments) co-crystallize with the hydrocarbon, while amorphous segments (such as vinyl acetate) form bridges between the crystalline regions. As a result, the cooled compact has improved green strength over conventional binder systems.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: July 15, 2003
    Assignee: General Electric Company
    Inventors: Daniel L. Polis, David Dudik, Vishal Gauri
  • Patent number: 6592804
    Abstract: A method and apparatus for forming a green ceramic arc tube for a metal halide lamp. A feedstock material comprising ceramic and a binder is prepared and injected into an inner cavity of a mold. The inner cavity of the mold has an inner surface that corresponds to a desired outer shape of a body of the ceramic arc tube. A fluid is injected into the feedstock material to create a cavity in the feedstock material and to force the feedstock material into contact with the inner surface of the mold. The mold is then separated from the formed ceramic green arc tube.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: July 15, 2003
    Assignee: General Electric Company
    Inventor: Vishal Gauri
  • Patent number: 6531209
    Abstract: A suspension adhesive comprised of a matrix material and a particulate filler material is useful for bonding, sealing, repairing, and modifying ceramic, glass, and powdered metal components in a light source. A method for making the suspension adhesive includes the selection of a filler material and a volume percentage of the filler material. Additionally, a matrix material is selected and the filler material is dispersed throughout the matrix material. The suspension adhesive is used to bond and seal components to form, for example, an arc tube for a light source.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: March 11, 2003
    Assignee: General Electric Company
    Inventors: Daniel Polis, Vishal Gauri