Patents by Inventor Shrikant P. Lohokare

Shrikant P. Lohokare 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: 8211238
    Abstract: A method for cleaning a processing chamber that includes heating an inner surface of the processing chamber to a first temperature. The first temperature can be sufficient to cause a first species to become volatile. The first species can be one of several species deposited on the inner surface. A cleaning chemistry is injected into the processing chamber. The cleaning chemistry can be reactive with a second one of the species to convert the second species to the first species. The volatilized first species can also be output from the processing chamber. A system for cleaning the process chamber is also described.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: July 3, 2012
    Assignee: Lam Research Corporation
    Inventors: Andrew D. Bailey, III, Shrikant P. Lohokare, Arthur M. Howald, Yunsang Kim
  • Patent number: 8017516
    Abstract: A system and method for forming a planar dielectric layer includes identifying a non-planarity in the dielectric layer, forming one or more additional dielectric layers over the dielectric layer and planarizing at least one of the additional dielectric layers wherein the one or more additional dielectric layers include at least one of a spin-on-glass layer and at least one of a low-k dielectric material layer and wherein each one of the one or more additional dielectric layers having a thickness of less than about 1000 angstroms and wherein the one or more additional dielectric layers has a total thickness of between about 1000 and about 4000 angstroms.
    Type: Grant
    Filed: April 3, 2007
    Date of Patent: September 13, 2011
    Assignee: Lam Research Corporation
    Inventors: Andrew D. Bailey, III, Shrikant P. Lohokare
  • Patent number: 7959984
    Abstract: In a plasma processing system, a method of reducing byproduct deposits on a set of plasma chamber surfaces of a plasma processing chamber is disclosed. The method includes providing a deposition barrier in the plasma processing chamber, the deposition barrier is configured to be disposed in a plasma generating region of the plasma processing chamber, thereby permitting at least some process byproducts produced when a plasma is struck within the plasma processing chamber to adhere to the deposition barrier and reducing the byproduct deposits on the set of plasma processing chamber surfaces.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: June 14, 2011
    Assignee: Lam Research Corporation
    Inventors: Shrikant P. Lohokare, Andrew D. Bailey, III
  • Patent number: 7413673
    Abstract: An apparatus and method for adjusting the voltage applied to a Faraday shield of an inductively coupled plasma etching apparatus is provided. An appropriate voltage is easily and variably applied to a Faraday shield such that sputtering of a plasma can be controlled to prevent and mitigate deposition of non-volatile reaction products that adversely affect an etching process. The appropriate voltage for a particular etching process or step is applied to the Faraday shield by simply adjusting a tuning capacitor. It is not necessary to mechanically reconfigure the etching apparatus to adjust the Faraday shield voltage.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: August 19, 2008
    Assignee: Lam Research Corporation
    Inventors: Shrikant P. Lohokare, Andras Kuthi, Andrew D. Bailey, III
  • Patent number: 7232766
    Abstract: A system and method of passivating an exposed conductive material includes placing a substrate in a process chamber and injecting a hydrogen species into the process chamber. A hydrogen species plasma is formed in the process chamber. A surface layer species is reduced from a top surface of the substrate is reduced. The reduced surface layer species are purged from the process chamber.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: June 19, 2007
    Assignee: Lam Research Corporation
    Inventors: Andrew D. Bailey, III, Shrikant P. Lohokare
  • Patent number: 7217649
    Abstract: A system and method for forming a semiconductor in a dual damascene structure including receiving a patterned semiconductor substrate. The semiconductor substrate having a first conductive interconnect material filling multiple features in the pattern. The first conductive interconnect material having an overburden portion. The over burden portion is planarized. The over burden portion is substantially entirely removed in the planarizing process. A mask layer is reduced and a subsequent dielectric layer is formed on the planarized over burden portion. A mask is formed on the subsequent dielectric layer. One or more features are formed in the subsequent dielectric layer and the features are filled with a second conductive interconnect material.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: May 15, 2007
    Assignee: LAM Research Corporation
    Inventors: Andrew D. Bailey, III, Shrikant P. Lohokare
  • Patent number: 7140374
    Abstract: A method for cleaning a processing chamber that includes heating an inner surface of the processing chamber to a first temperature. The first temperature can be sufficient to cause a first species to become volatile. The first species can be one of several species deposited on the inner surface. A cleaning chemistry is injected into the processing chamber. The cleaning chemistry can be reactive with a second one of the species to convert the second species to the first species. The volatilized first species can also be output from the processing chamber. A system for cleaning the process chamber is also described.
    Type: Grant
    Filed: March 16, 2004
    Date of Patent: November 28, 2006
    Assignee: Lam Research Corporation
    Inventors: Andrew D. Bailey, III, Shrikant P. Lohokare, Arthur M. Howald, Yunsang Kim
  • Patent number: 7129167
    Abstract: A method of cleaning a substrate includes receiving a substrate and applying a stress-free cleaning process to the top surface of the substrate. The substrate includes a top surface that is substantially free of device dependent planarity nonuniformities and device independent planarity nonuniformities. The top surface also includes a first material and a device structure formed in the first material, the device structure being formed from a second material. The device structure has a device surface exposed. The device surface has a first surface roughness. A system for stress-free cleaning a substrate is also described.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: October 31, 2006
    Assignee: LAM Research Corporation
    Inventors: Andrew D. Bailey, III, Shrikant P. Lohokare, Yunsang Kim, Simon McClatchie
  • Patent number: 6939796
    Abstract: A system and method for planarizing a patterned semiconductor substrate includes receiving a patterned semiconductor substrate. The patterned semiconductor substrate having a conductive interconnect material filling multiple of features in the pattern. The conductive interconnect material having an overburden portion. The overburden portion having a localized non-uniformity. A bulk portion of the overburden portion is removed to planarize the overburden portion. The substantially locally planarized overburden portion is mapped to determine a global non-uniformity. The substantially locally planarized overburden portion is etched to substantially remove the global non-uniformity.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: September 6, 2005
    Assignee: Lam Research Corporation
    Inventors: Shrikant P. Lohokare, Andrew D. Bailey, III, David Hemker, Joel M. Cook
  • Publication number: 20040248408
    Abstract: A system and method for planarizing a patterned semiconductor substrate includes receiving a patterned semiconductor substrate. The patterned semiconductor substrate having a conductive interconnect material filling multiple of features in the pattern. The conductive interconnect material having an overburden portion. The overburden portion having a localized non-uniformity. A bulk portion of the overburden portion is removed to planarize the overburden portion. The substantially locally planarized overburden portion is mapped to determine a global non-uniformity. The substantially locally planarized overburden portion is etched to substantially remove the global non-uniformity.
    Type: Application
    Filed: March 14, 2003
    Publication date: December 9, 2004
    Applicant: LAM RESEARCH CORPORATION
    Inventors: Shrikant P. Lohokare, Andrew D. Bailey, David Hemker, Joel M. Cook
  • Patent number: 6821899
    Abstract: A system and method for planarizing a patterned semiconductor substrate includes receiving a patterned semiconductor substrate. The patterned semiconductor substrate having a conductive interconnect material filling multiple of features in the pattern. The conductive interconnect material having an overburden portion. The overburden portion includes a localized non-uniformity. An additional layer is formed on the overburden portion. The additional layer and the overburden portion are planarized. The planarizing process substantially entirely removes the additional layer.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: November 23, 2004
    Assignee: Lam Research Corporation
    Inventors: Shrikant P. Lohokare, Andrew D. Bailey, III, David Hemker, Joel M. Cook
  • Publication number: 20040180545
    Abstract: A system and method for planarizing a patterned semiconductor substrate includes receiving a patterned semiconductor substrate. The patterned semiconductor substrate having a conductive interconnect material filling multiple of features in the pattern. The conductive interconnect material having an overburden portion. The overburden portion includes a localized non-uniformity. An additional layer is formed on the overburden portion. The additional layer and the overburden portion are planarized. The planarizing process substantially entirely removes the additional layer.
    Type: Application
    Filed: March 14, 2003
    Publication date: September 16, 2004
    Applicant: LAM RESEARCH CORPORATION
    Inventors: Shrikant P. Lohokare, Andrew D. Bailey, David Hemker, Joel M. Cook