Patents by Inventor Krishna Birru

Krishna Birru 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: 20230130557
    Abstract: Providing herein are methods of delivery of gas reactants to a processing chamber and related apparatus.
    Type: Application
    Filed: March 3, 2021
    Publication date: April 27, 2023
    Inventors: Krishna BIRRU, Leonard Wai Fung KHO, Anand CHANDRASHEKAR, Michael BOWES, Yong SUN, Xing ZHANG, Sumit Subhash SINGH
  • Publication number: 20230122846
    Abstract: Provided herein are methods of filling features with metal including inhibition of metal nucleation. Also provided are methods of enhancing inhibition and methods of reducing or eliminating inhibition of metal nucleation.
    Type: Application
    Filed: March 12, 2021
    Publication date: April 20, 2023
    Inventors: Rohit KHARE, Krishna BIRRU, Gang L. LIU, Anand CHANDRASHEKAR, Leonard Wai Fung KHO
  • Publication number: 20230034561
    Abstract: In a process chamber connected with a process roughing pump via a pump foreline, pumping from the process chamber to the foreline ammonia and a deposition precursor, introducing into the foreline hydrogen fluoride gas to react with the ammonia to form ammonium fluoride, and maintaining the process roughing pump and pump foreline at at least the ammonium fluoride sublimation temperature during the pumping provides ammonia abatement for improved roughing pump performance.
    Type: Application
    Filed: January 6, 2021
    Publication date: February 2, 2023
    Inventors: Gishun Hsu, Krishna Birru, Kevin Madrigal
  • Publication number: 20230002891
    Abstract: Forming a protective coating ex situ in an atomic layer deposition process to coat one or more chamber components subsequently installed in a reaction chamber provides a number of benefits over more conventional coating methods such as in situ deposition of an undercoat. In certain cases the protective coating may have a particular composition such as aluminum oxide, aluminum fluoride, aluminum nitride, yttrium oxide, and/or yttrium fluoride. The protective coating may help reduce contamination on wafers processed using the coated chamber component. Further, the protective coating may act to stabilize the processing conditions within the reaction chamber, thereby achieving very stable/uniform processing results over the course of processing many batches of wafers, and minimizing radical loss. Also described are a number of techniques that may be used to restore the protective coating after the coated chamber component is used to process semiconductor wafers.
    Type: Application
    Filed: September 7, 2022
    Publication date: January 5, 2023
    Inventors: Damodar Rajaram SHANBHAG, Guangbi YUAN, Thadeous BAMFORD, Curtis Warren BAILEY, Tony KAUSHAL, Krishna BIRRU, William SCHLOSSER, Bo GONG, Huatan QIU, Fengyuan LAI, Leonard Wai Fung KHO, Anand CHANDRASHEKAR, Andrew H. BRENINGER, Chen-Hua HSU, Geoffrey HOHN, Gang LIU, Rohit KHARE
  • Publication number: 20220275504
    Abstract: Forming a protective coating ex situ in an atomic layer deposition process to coat one or more chamber components subsequently installed in a reaction chamber provides a number of benefits over more conventional coating methods such as in situ deposition of an undercoat. In certain cases the protective coating may have a particular composition such as aluminum oxide, aluminum fluoride, aluminum nitride, yttrium oxide, and/or yttrium fluoride. The protective coating may help reduce contamination on wafers processed using the coated chamber component. Further, the protective coating may act to stabilize the processing conditions within the reaction chamber, thereby achieving very stable/uniform processing results over the course of processing many batches of wafers, and minimizing radical loss. Also described are a number of techniques that may be used to restore the protective coating after the coated chamber component is used to process semiconductor wafers.
    Type: Application
    Filed: May 16, 2022
    Publication date: September 1, 2022
    Inventors: Damodar Rajaram SHANBHAG, Guangbi YUAN, Thadeous BAMFORD, Curtis Warren BAILEY, Tony KAUSHAL, Krishna BIRRU, William SCHLOSSER, Bo GONG, Huatan QIU, Fengyuan LAI, Leonard Wai Fung KHO, Anand CHANDRASHEKAR, Andrew H. BRENINGER, Chen-Hua HSU, Geoffrey HOHN, Gang LIU, Rohit KHARE
  • Patent number: 11365479
    Abstract: Forming a protective coating ex situ in an atomic layer deposition process to coat one or more chamber components subsequently installed in a reaction chamber provides a number of benefits over more conventional coating methods such as in situ deposition of an undercoat. In certain cases the protective coating may have a particular composition such as aluminum oxide, aluminum fluoride, aluminum nitride, yttrium oxide, and/or yttrium fluoride. The protective coating may help reduce contamination on wafers processed using the coated chamber component. Further, the protective coating may act to stabilize the processing conditions within the reaction chamber, thereby achieving very stable/uniform processing results over the course of processing many batches of wafers, and minimizing radical loss. Also described are a number of techniques that may be used to restore the protective coating after the coated chamber component is used to process semiconductor wafers.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: June 21, 2022
    Assignee: Lam Research Corporation
    Inventors: Damodar Shanbhag, Guangbi Yuan, Thadeous Bamford, Curtis Warren Bailey, Tony Kaushal, Krishna Birru, William Schlosser, Bo Gong, Huatan Qiu, Fengyuan Lai, Leonard Wai Fung Kho, Anand Chandrashekar, Andrew H. Breninger, Chen-Hua Hsu, Geoffrey Hohn, Gang Liu, Rohit Khare
  • Publication number: 20210257194
    Abstract: An exhaust system for a substrate processing system includes a radical generator configured to receive a gas mixture including halogen species and to generate halogen radicals, a first pump to pump exhaust gas from an exhaust outlet of a processing chamber, and a first valve configured to selectively fluidly connect an outlet of the radical generator to the first pump downstream from the outlet of the processing chamber.
    Type: Application
    Filed: June 14, 2019
    Publication date: August 19, 2021
    Inventors: Krishna BIRRU, Gang LIU, Leonard KHO, Anand CHANDRASHEKAR, Gishun HSU
  • Publication number: 20200347497
    Abstract: Forming a protective coating ex situ in an atomic layer deposition process to coat one or more chamber components subsequently installed in a reaction chamber provides a number of benefits over more conventional coating methods such as in situ deposition of an undercoat. In certain cases the protective coating may have a particular composition such as aluminum oxide, aluminum fluoride, aluminum nitride, yttrium oxide, and/or yttrium fluoride. The protective coating may help reduce contamination on wafers processed using the coated chamber component. Further, the protective coating may act to stabilize the processing conditions within the reaction chamber, thereby achieving very stable/uniform processing results over the course of processing many batches of wafers, and minimizing radical loss. Also described are a number of techniques that may be used to restore the protective coating after the coated chamber component is used to process semiconductor wafers.
    Type: Application
    Filed: July 22, 2020
    Publication date: November 5, 2020
    Inventors: Damodar Shanbhag, Guangbi Yuan, Thadeous Bamford, Curtis Warren Bailey, Tony Kaushal, Krishna Birru, William Schlosser, Bo Gong, Huatan Qiu, Fengyuan Lai, Leonard Wai Fung Kho, Anand Chandrashekar, Andrew H. Breninger, Chen-Hua Hsu, Geoffrey Hohn, Gang Liu, Rohit Khare
  • Patent number: 10760158
    Abstract: Forming a protective coating ex situ in an atomic layer deposition process to coat one or more chamber components subsequently installed in a reaction chamber provides a number of benefits over more conventional coating methods such as in situ deposition of an undercoat. In certain cases the protective coating may have a particular composition such as aluminum oxide, aluminum fluoride, aluminum nitride, yttrium oxide, and/or yttrium fluoride. The protective coating may help reduce contamination on wafers processed using the coated chamber component. Further, the protective coating may act to stabilize the processing conditions within the reaction chamber, thereby achieving very stable/uniform processing results over the course of processing many batches of wafers, and minimizing radical loss. Also described are a number of techniques that may be used to restore the protective coating after the coated chamber component is used to process semiconductor wafers.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: September 1, 2020
    Assignee: Lam Research Corporation
    Inventors: Damodar Shanbhag, Guangbi Yuan, Thadeous Bamford, Curtis Warren Bailey, Tony Kaushal, Krishna Birru, William Schlosser, Bo Gong, Fengyuan Lai, Leonard Wai Fung Kho, Anand Chandrashekar, Andrew H. Breninger, Chen-Hua Hsu, Geoffrey Hohn, Gang Liu, Rohit Khare, Huatan Qiu
  • Publication number: 20190185999
    Abstract: Forming a protective coating ex situ in an atomic layer deposition process to coat one or more chamber components subsequently installed in a reaction chamber provides a number of benefits over more conventional coating methods such as in situ deposition of an undercoat. In certain cases the protective coating may have a particular composition such as aluminum oxide, aluminum fluoride, aluminum nitride, yttrium oxide, and/or yttrium fluoride. The protective coating may help reduce contamination on wafers processed using the coated chamber component. Further, the protective coating may act to stabilize the processing conditions within the reaction chamber, thereby achieving very stable/uniform processing results over the course of processing many batches of wafers, and minimizing radical loss. Also described are a number of techniques that may be used to restore the protective coating after the coated chamber component is used to process semiconductor wafers.
    Type: Application
    Filed: April 16, 2018
    Publication date: June 20, 2019
    Inventors: Damodar Shanbhag, Guangbi Yuan, Thadeous Bamford, Curtis Warren Bailey, Tony Kaushal, Krishna Birru, William Schlosser, Bo Gong, Huatan Qiu, Fengyuan Lai, Leonard Wai Fung Kho, Anand Chandrashekar, Andrew H. Breninger, Chen-Hua Hsu, Geoffrey Hohn, Gang Liu, Rohit Khare