Patents by Inventor Rajiv K. Singh

Rajiv K. Singh 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).

  • Publication number: 20240150267
    Abstract: The present disclosure provides a process for producing trifluoroiodomethane, the process comprising providing a reactant stream comprising hydrogen iodide and at least one trifluoroacetyl halide selected from the group consisting of trifluoroacetyl chloride, trifluoroacetyl fluoride, trifluoroacetyl bromide, and combinations thereof, reacting the reactant stream in the presence of a first catalyst at a first reaction temperature from about 25° C. to about 400° C. to produce an intermediate product stream comprising trifluoroacetyl iodide, and reacting the intermediate product stream in the presence of a second catalyst at a second reaction temperature from about 200° C. to about 600° C. to produce a final product stream comprising the trifluoroiodomethane.
    Type: Application
    Filed: December 8, 2023
    Publication date: May 9, 2024
    Inventors: Haridasan K. Nair, Glenn Matthies, Rajiv Ratna Singh, Terris Yang, Haiyou Wang, Ryan J. Hulse, Rajiv Banavali
  • Publication number: 20240052201
    Abstract: The present disclosure describes a slurry composition to reduce roughness a surface, such as a polycrystalline material including silicon carbide, alumina, diamond, and carbon. The present disclosure can also be applied to single crystal materials (e.g., silicon carbide, sapphire, or diamond).
    Type: Application
    Filed: August 9, 2023
    Publication date: February 15, 2024
    Inventors: Rajiv K. Singh, Sunny De, Aditya Dilip Verma
  • Patent number: 11840645
    Abstract: A slurry for chemical mechanical polishing (CMP) includes an aqueous liquid carrier, an oxygen and anion containing transition metal compound or polyatomic cations including a transition metal and oxygen or hydrogen, and a per-based oxidizer. The anion for the oxygen and anion containing transition metal compound can include oxynitrate, oxychloride, oxyhydroxide, oxyacetate, oxysulfide, or oxysulfate. The per-based oxidizer can be a permanganate compound.
    Type: Grant
    Filed: January 30, 2021
    Date of Patent: December 12, 2023
    Assignee: ENTEGRIS, INC.
    Inventors: Rajiv K. Singh, Sunny De, Deepika Singh, Chaitanya Dnyanesh Ginde, Aditya Dilip Verma
  • Patent number: 11820918
    Abstract: A method of CMP includes providing a slurry solution including ?1 per-compound oxidizer in a concentration between 0.01 M and 2 M with a pH from 2 to 5 or 8 to 11, and ?1 buffering agent which provides a buffering ratio ?1.5 that compares an amount of a strong acid needed to reduce the pH from 9.0 to 3.0 as compared to an amount of strong acid to change the pH from 9.0 to 3.0 without the buffering agent. The slurry solution is exclusive any hard slurry particles or has only soft slurry particles that have throughout a Vickers hardness <300 Kg/mm2 or Mohs Hardness <4. The slurry solution is dispensed on a hard surface having a Vickers hardness >1,000 kg/mm2 is pressed by a polishing pad with the slurry solution in between while rotating the polishing pad relative to the hard surface.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: November 21, 2023
    Assignee: ENTEGRIS, INC.
    Inventors: Rajiv K. Singh, Arul Arjunan, Deepika Singh, Chaitanya Ginde, Puneet Jawali
  • Publication number: 20230127390
    Abstract: The invention provides methodology for final finishing of hard surfaces such as diamond surfaces. In this method, a smooth pad having a surface roughness of about 0.2 nm to about 100 nm, having, for example a thickness ranging from about 0.02 mm to about 5 mm, and a Shore D hardness of 30 or higher, is utilized in conjunction with known polishing slurries to provide diamond surfaces having superior smooth finishes.
    Type: Application
    Filed: October 20, 2022
    Publication date: April 27, 2023
    Inventors: Rajiv K. Singh, Sunny De
  • Publication number: 20230002641
    Abstract: The invention provides compositions useful in the polishing of transition metal-containing surfaces typically found on microelectronic devices. In one aspect, the invention provides a composition comprising: a liquid carrier; titania abrasive particles, wherein the particles are at least partially coated with alumina or amorphous silica to provide coated titania abrasive particles; wherein the coated titania abrasive particles have an average diameter of about 50 nm to about 250 nm; and a corrosion inhibitor. The invention, the compositions are advantageously utilized to polish microelectronic device substrates having transition metal-containing surfaces thereon. In certain embodiments, the surfaces are chosen from molybdenum and ruthenium-containing films and show markedly improved selectivity relative to thermal oxide.
    Type: Application
    Filed: June 22, 2022
    Publication date: January 5, 2023
    Inventors: Rajiv K. Singh, Sunny De, Akshay Rajopadhye, Aditya D. Verma
  • Publication number: 20220396715
    Abstract: The invention provides improved slurries for the polishing of hard materials such as those having a Mohs hardness of greater than about 6. Exemplary hard surfaces include sapphire, silicon carbide, silicon nitride, and gallium nitride, and diamond. In the compositions and method of the invention, novel compositions comprising a unique combination of additives which surprisingly were found to uniformly disperse diamond particles having a wide range of particle size in a slurry. In the method of the invention, the generally alkaline slurry compositions of the invention are capable of utilizing diamond particle sizes of greater than 40 microns while effecting good removal rates. In such cases, when utilized with a suitable pad, rapid and planar grinding of silicon carbide, silicon nitride, sapphire, gallium nitride, and diamond is possible, with uniform surface damage.
    Type: Application
    Filed: June 14, 2022
    Publication date: December 15, 2022
    Inventors: Rajiv K. Singh, Sunny De
  • Publication number: 20220332977
    Abstract: Provided are improved slurry compositions useful in the CMP polishing of glass and other dielectric materials. In one aspect, the compositions of the invention are comprised of water; silica abrasive; a cationic surfactant; and ceria abrasive. The compositions effect a high removal rate while limiting the number of scratches typically observed when utilizing ceria alone.
    Type: Application
    Filed: April 16, 2021
    Publication date: October 20, 2022
    Inventors: Akshay RAJOPADHYE, Rajiv K. SINGH, Sunny DE
  • Patent number: 11213927
    Abstract: A method of processing chemical mechanical polishing (CMP) pad conditioners includes providing the CMP pad conditioner including conditioner substrate that is a metal, ceramic or a metal-ceramic material with a plurality of hard conditioner particles with a Vickers hardness greater than 3,000 Kg/mm2 bonded to a top surface of the conditioner substrate, and a slurry including an aqueous medium and a plurality of hard slurry particles having a hardness greater than 3,000 Kg/mm2. The surface of the pad conditioner is polished in a CMP apparatus using a polishing pad. After the polishing each conditioner particle has at least one exposed facet, and the plurality of hard conditioner particles have a maximum average protrusion-to-protrusion flatness (PPF) difference of 20 microns, and a sharpest edge measured by a value of a cutting edge radius (CER) that lies at an edge of the facet for at least 80% of the facets.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: January 4, 2022
    Assignee: ENTREGIS, INC.
    Inventors: Rajiv K. Singh, Deepika Singh
  • Publication number: 20210324238
    Abstract: A method of CMP includes providing a slurry solution including ?1 per-compound oxidizer in a concentration between 0.01 M and 2 M with a pH from 2 to 5 or 8 to 11, and ?1 buffering agent which provides a buffering ratio ?1.5 that compares an amount of a strong acid needed to reduce the pH from 9.0 to 3.0 as compared to an amount of strong acid to change the pH from 9.0 to 3.0 without the buffering agent. The slurry solution is exclusive any hard slurry particles or has only soft slurry particles that have throughout a Vickers hardness <300 Kg/mm2 or Mohs Hardness <4. The slurry solution is dispensed on a hard surface having a Vickers hardness >1,000 kg/mm2 is pressed by a polishing pad with the slurry solution in between while rotating the polishing pad relative to the hard surface.
    Type: Application
    Filed: July 1, 2021
    Publication date: October 21, 2021
    Inventors: Rajiv K. SINGH, Arul ARJUNAN, Deepika SINGH, Chaitanya GINDE, Pneet JAWALI
  • Patent number: 11087262
    Abstract: Implementations described and claimed herein provide systems and methods for generating customer solutions using real-time information for new customer sales and/or current customer support. In one implementation, technical infrastructure information for an installed network design providing one or more telecommunication products at one or more customer sites is retrieved. Customer service analytics are generated based on the technical infrastructure information and output for display on a graphical user interface.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: August 10, 2021
    Assignee: Level 3 Communications, LLC
    Inventors: Jeff Storey, Yunas Nadiadi, Rene Grippo, Allen E. Dixon, Eric D. Gundersen, Luke P. Philips, Rajiv K. Singh, Sanjiv Kumar, Eric D. Prosser, Derek Hodovance, Wesley Jensen, Imran A. Aslam, Maria A. Elliott, Peter Cleary, Andrew Dugan, Paul Farnsworth, John F. Waters, Jr.
  • Publication number: 20210238448
    Abstract: A slurry for chemical mechanical polishing (CMP) includes an aqueous liquid carrier, an oxygen and anion containing transition metal compound or polyatomic cations including a transition metal and oxygen or hydrogen, and a per-based oxidizer. The anion for the oxygen and anion containing transition metal compound can include oxynitrate, oxychloride, oxyhydroxide, oxyacetate, oxysulfide, or oxysulfate. The per-based oxidizer can be a permanganate compound.
    Type: Application
    Filed: January 30, 2021
    Publication date: August 5, 2021
    Inventors: Rajiv K. SINGH, Sunny DE, Deepika SINGH, Chaitanya Dnyanesh GINDE, Aditya Dilip VERMA
  • Patent number: 11078380
    Abstract: A method of CMP includes providing a slurry solution including ?1 per-compound oxidizer in a concentration between 0.01 M and 2 M with a pH from 2 to 5 or 8 to 11, and ?1 buffering agent which provides a buffering ratio ?1.5 that compares an amount of a strong acid needed to reduce the pH from 9.0 to 3.0 as compared to an amount of strong acid to change the pH from 9.0 to 3.0 without the buffering agent. The slurry solution is exclusive any hard slurry particles or has only soft slurry particles that have throughout a Vickers hardness <300 Kg/mm2 or Mohs Hardness <4. The slurry solution is dispensed on a hard surface having a Vickers hardness >1,000 kg/mm2 is pressed by a polishing pad with the slurry solution in between while rotating the polishing pad relative to the hard surface.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: August 3, 2021
    Assignees: Entegris, Inc., University of Florida Research Foundation, Inc.
    Inventors: Rajiv K. Singh, Arul Arjunan, Deepika Singh, Chaitanya Ginde, Puneet N. Jawali
  • Patent number: 10868899
    Abstract: A method to provide compressive stress to substrates includes depositing a film on a ceramic substrate at a deposition temperature (Td) to form an article, the film having a difference relative to the ceramic substrate at Td in a coefficient thermal expansion (CTE) of at least 1.0×10?6/K and a difference in a refractive index >0.10. At least a portion of the thickness the film is converted in at least one of composition, phase and microstructure by lowering or raising the temperature from Td to reach a changed temperature (Tc) that is at least 100° C. different from Td. The film converting conditions result in the converted film portion providing a difference in refractive index at the Tc between the converted film and the ceramic substrate of ?|0.10|. The temperature of the article is then lowered to room temperature.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: December 15, 2020
    Assignees: ENTEGRIS, INC., UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Rajiv K. Singh, Deepika Singh
  • Patent number: 10708151
    Abstract: Aspects of the present disclosure include an adaptive notification and ticketing system for a telecommunications network. The system includes a computing device and a plurality of network devices associated with the telecommunications network. Data is generated about a plurality of past network events associated with the plurality of network devices. The computing device is utilized to generate a model from the data. The model may be used to interpret new network events and generate an output indicative of a service impact event. The new network events are applied to the model using the computing device to generate the output indicative of a service impact event. The computing device generates a responsive action from the output indicative of a service impact event. The service impact event is a network event that disrupts a network service associated with the telecommunications network.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: July 7, 2020
    Assignee: Level 3 Communications, LLC
    Inventors: Allen E. Dixon, Sharna Aeckerle, Paul Farnsworth, Rene Grippo, Eric D. Gundersen, Sanjiv Kumar, Rick D. Lind, Matthew R. Moore, Luke P. Philips, Rajiv K. Singh, Raymond L. Smith, David L. Stozki
  • Publication number: 20200102479
    Abstract: A method of chemical mechanical polishing (CMP) includes providing a slurry solution including at least one per-compound permanganate oxidizer in a concentration between 0.01 M and 2 M, with a pH level from 1.5 to 5 or from 8 to 11, and at least one buffering agent. The buffering agent is different from this pure-compound permanganate oxidizer, and comprises a surfactant and/or an alkali metal ion. The slurry solution is exclusive of any added particles. The slurry solution is dispensed on a hard surface having a Vickers hardness >1,000 kg/mm2 and is pressed by a polishing pad with the slurry solution in between while rotating the polishing pad relative to the hard surface.
    Type: Application
    Filed: December 4, 2019
    Publication date: April 2, 2020
    Inventors: RAJIV K. SINGH, ARUL ARJUNAN, DEEPIKA SINGH, CHAITANYA GINDE, PUNEET N. JAWALI
  • Patent number: 10489806
    Abstract: Implementations of the present disclosure involve a system and/or method of displaying and reviewing prospective customers. The system and/or method may display a prospect map showing geographic areas, corresponding technical infrastructure, and prospects present in the areas. The prospect displayed may be adjusted based on user defined prospect attributes.
    Type: Grant
    Filed: January 3, 2013
    Date of Patent: November 26, 2019
    Assignee: Level 3 Communications, LLC
    Inventors: Yunas Nadiadi, Paul Farnsworth, Jeff Storey, Ajit K. Rao, Eric D. Gundersen, Allen E. Dixon, Sanjiv Kumar, Rene Grippo, Luke Philips, Rajiv K. Singh, Chris Cuttitta
  • Publication number: 20190202028
    Abstract: A method of processing chemical mechanical polishing (CMP) pad conditioners includes providing the CMP pad conditioner including conditioner substrate that is a metal, ceramic or a metal-ceramic material with a plurality of hard conditioner particles with a Vickers hardness greater than 3,000 Kg/mm2 bonded to a top surface of the conditioner substrate, and a slurry including an aqueous medium and a plurality of hard slurry particles having a hardness greater than 3,000 Kg/mm2. The surface of the pad conditioner is polished in a CMP apparatus using a polishing pad. After the polishing each conditioner particle has at least one exposed facet, and the plurality of hard conditioner particles have a maximum average protrusion-to-protrusion flatness (PPF) difference of 20 microns, and a sharpest edge measured by a value of a cutting edge radius (CER) that lies at an edge of the facet for at least 80% of the facets.
    Type: Application
    Filed: December 27, 2018
    Publication date: July 4, 2019
    Inventors: RAJIV K. SINGH, DEEPIKA SINGH
  • Publication number: 20190010356
    Abstract: A method of CMP includes providing a slurry solution including ?1 per-compound oxidizer in a concentration between 0.01 M and 2 M with a pH from 2 to 5 or 8 to 11, and ?1 buffering agent which provides a buffering ratio ?1.5 that compares an amount of a strong acid needed to reduce the pH from 9.0 to 3.0 as compared to an amount of strong acid to change the pH from 9.0 to 3.0 without the buffering agent. The slurry solution is exclusive any hard slurry particles or has only soft slurry particles that have throughout a Vickers hardness <300 Kg/mm2 or Mohs Hardness <4. The slurry solution is dispensed on a hard surface having a Vickers hardness >1,000 kg/mm2 is pressed by a polishing pad with the slurry solution in between while rotating the polishing pad relative to the hard surface.
    Type: Application
    Filed: July 10, 2017
    Publication date: January 10, 2019
    Inventors: RAJIV K. SINGH, ARUL ARJUNAN, DEEPIKA SINGH, CHAITANYA GINDE, PUNEET N. JAWALI
  • Publication number: 20180375978
    Abstract: A method to provide compressive stress to substrates includes depositing a film on a ceramic substrate at a deposition temperature (Td) to form an article, the film having a difference relative to the ceramic substrate at Td in a coefficient thermal expansion (CTE) of at least 1.0×10?6/K and a difference in a refractive index >0.10. At least a portion of the thickness the film is converted in at least one of composition, phase and microstructure by lowering or raising the temperature from Td to reach a changed temperature (Tc) that is at least 100° C. different from Td. The film converting conditions result in the converted film portion providing a difference in refractive index at the Tc between the converted film and the ceramic substrate of ?|0.10|. The temperature of the article is then lowered to room temperature.
    Type: Application
    Filed: June 22, 2018
    Publication date: December 27, 2018
    Inventors: RAJIV K. SINGH, DEEPIKA SINGH