Patents by Inventor Rangarajan Jagannathan

Rangarajan Jagannathan 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: 20240100713
    Abstract: Embodiments described herein generally relate to equipment used in the manufacturing of electronic devices, and more particularly, to a cleaning system, cleaning system hardware and related methods which may be used to transport and clean the surface of a substrate. According to one embodiment, a blade handling assembly for handling a substrate in a cleaning system includes a gripping assembly including a pair of gripping blades, the blades operable with a gripping actuator to hold a substrate at its edges. The assembly includes a first blade actuator for moving the gripping assembly and substrate between a horizontal and a vertical orientation utilizing a first axis. The assembly includes a second blade actuator for moving the vertically oriented gripping assembly and substrate 180 degrees utilizing a second axis, thereby causing the substrate to face an opposite direction.
    Type: Application
    Filed: September 11, 2023
    Publication date: March 28, 2024
    Inventors: Jagan RANGARAJAN, Edward GOLUBOVSKY, Edwin VELAZQUEZ, Adrian S. BLANK, Steven M. ZUNIGA, Balasubramaniam C. JAGANNATHAN
  • Publication number: 20240100714
    Abstract: Embodiments described herein generally relate to equipment used in the manufacturing of electronic devices, and more particularly, to a cleaning system, cleaning system hardware and related methods which may be used to transport and clean the surface of a substrate. According to one embodiment, a substrate cleaning unit may include a pre-clean chamber that performs a pre-clean process on a substrate with the substrate in a horizontal orientation. The unit may also include a first cleaning chamber that performs a first cleaning process on the substrate with the substrate in a vertical orientation. The unit may also include a second cleaning chamber. The unit may also include an integrated cleaning and drying chamber that performs a cleaning and drying process on the substrate in the horizontal orientation. A substrate handler may transfer the substrate between the chambers. The first and second cleaning chambers may be positioned below the pre-clean chamber.
    Type: Application
    Filed: November 20, 2023
    Publication date: March 28, 2024
    Inventors: Jagan RANGARAJAN, Edward GOLUBOVSKY, Edwin VALAZQUEZ, Adrian S. BLANK, Steven M. ZUNIGA, Balasubramaniam C. JAGANNATHAN
  • Patent number: 11199769
    Abstract: A method of processing a trench, via, hole, recess, void, or other feature that extends a depth into a substrate to a base or bottom and has an opening by irradiation with an accelerated neutral beam derived from an accelerated gas cluster ion beam for processing materials at the base or bottom of the opening.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: December 14, 2021
    Inventors: Sean R. Kirkpatrick, Rangarajan Jagannathan
  • Patent number: 10882842
    Abstract: The present invention concerns pyridinium compounds, a synthesis method for their preparation, metal or metal alloy plating baths containing said pyridinium compounds and a method for use of said metal or metal alloy plating baths. The plating baths are particularly suitable for use in filling of recessed structures in the electronics and semiconductor industry including dual damascene applications.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: January 5, 2021
    Assignee: Atotech Deutschland GmbH
    Inventors: Rangarajan Jagannathan, James Adolf, Jun Wu, Lars Kohlmann, Heiko Brunner
  • Publication number: 20200231565
    Abstract: The present invention concerns pyridinium compounds, a synthesis method for their preparation, metal or metal alloy plating baths containing said pyridinium compounds and a method for use of said metal or metal alloy plating baths. The plating baths are particularly suitable for use in filling of recessed structures in the electronics and semiconductor industry including dual damascene applications.
    Type: Application
    Filed: January 26, 2018
    Publication date: July 23, 2020
    Inventors: Rangarajan JAGANNATHAN, James ADOLF, Jun WU, Lars KOHLMANN, Heiko BRUNNER
  • Publication number: 20180299771
    Abstract: A method of processing a trench, via, hole, recess, void, or other feature that extends a depth into a substrate to a base or bottom and has an opening by irradiation with an accelerated neutral beam derived from an accelerated gas cluster ion beam for processing materials at the base or bottom of the opening.
    Type: Application
    Filed: June 14, 2018
    Publication date: October 18, 2018
    Applicant: Exogenesis Corporation
    Inventors: Sean R. Kirkpatrick, Rangarajan Jagannathan
  • Patent number: 8536630
    Abstract: In an embodiment, a method of fabricating a transistor device comprises: providing a semiconductor topography comprising a gate conductor disposed above a semiconductor substrate between a pair of dielectric spacers; anisotropically etching exposed regions of the semiconductor substrate on opposite sides of the dielectric spacers to form recessed regions in the substrate; oxidizing exposed surfaces of the substrate in the recessed regions to form an oxide thereon; removing the oxide from bottoms of the recessed regions while retaining the oxide upon sidewalls of the recessed regions; and isotropically etching the substrate such that the recessed regions undercut the pair of dielectric spacers.
    Type: Grant
    Filed: November 21, 2011
    Date of Patent: September 17, 2013
    Assignee: International Business Machines Corporation
    Inventors: John C. Arnold, Xuefeng Hua, Rangarajan Jagannathan, Stefan Schmitz
  • Publication number: 20120061684
    Abstract: In an embodiment, a method of fabricating a transistor device comprises: providing a semiconductor topography comprising a gate conductor disposed above a semiconductor substrate between a pair of dielectric spacers; anisotropically etching exposed regions of the semiconductor substrate on opposite sides of the dielectric spacers to form recessed regions in the substrate; oxidizing exposed surfaces of the substrate in the recessed regions to form an oxide thereon; removing the oxide from bottoms of the recessed regions while retaining the oxide upon sidewalls of the recessed regions; and isotropically etching the substrate such that the recessed regions undercut the pair of dielectric spacers.
    Type: Application
    Filed: November 21, 2011
    Publication date: March 15, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: John C. Arnold, Xuefeng Hua, Rangarajan Jagannathan, Stefan Schmitz
  • Patent number: 8084329
    Abstract: In an embodiment, a method of fabricating a transistor device comprises: providing a semiconductor topography comprising a gate conductor disposed above a semiconductor substrate between a pair of dielectric spacers; anisotropically etching exposed regions of the semiconductor substrate on opposite sides of the dielectric spacers to form recessed regions in the substrate; oxidizing exposed surfaces of the substrate in the recessed regions to form an oxide thereon; removing the oxide from bottoms of the recessed regions while retaining the oxide upon sidewalls of the recessed regions; and isotropically etching the substrate such that the recessed regions undercut the pair of dielectric spacers.
    Type: Grant
    Filed: January 26, 2010
    Date of Patent: December 27, 2011
    Assignee: International Business Machines Corporation
    Inventors: John C. Arnold, Xuefeng Hua, Rangarajan Jagannathan, Stefan Schmitz
  • Patent number: 7859013
    Abstract: Disclosed are embodiments of a MOSFET with defined halos that are bound to defined source/drain extensions and a method of forming the MOSFET. A semiconductor layer is etched to form recesses that undercut a gate dielectric layer. A low energy implant forms halos. Then, a COR pre-clean is performed and the recesses are filled by epitaxial deposition. The epi can be in-situ doped or subsequently implanted to form source/drain extensions. Alternatively, the etch is immediately followed by the COR pre-clean, which is followed by epitaxial deposition to fill the recesses. During the epitaxial deposition process, the deposited material is doped to form in-situ doped halos and, then, the dopant is switched to form in-situ doped source/drain extensions adjacent to the halos. Alternatively, after the in-situ doped halos are formed the deposition process is performed without dopants and an implant is used to form source/drain extensions.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: December 28, 2010
    Assignee: International Business Machines Corporation
    Inventors: Huajie Chen, Judson R. Holt, Rangarajan Jagannathan, Wesley C. Natzle, Michael R. Sievers, Richard S. Wise
  • Publication number: 20100187579
    Abstract: In an embodiment, a method of fabricating a transistor device comprises: providing a semiconductor topography comprising a gate conductor disposed above a semiconductor substrate between a pair of dielectric spacers; anisotropically etching exposed regions of the semiconductor substrate on opposite sides of the dielectric spacers to form recessed regions in the substrate; oxidizing exposed surfaces of the substrate in the recessed regions to form an oxide thereon; removing the oxide from bottoms of the recessed regions while retaining the oxide upon sidewalls of the recessed regions; and isotropically etching the substrate such that the recessed regions undercut the pair of dielectric spacers.
    Type: Application
    Filed: January 26, 2010
    Publication date: July 29, 2010
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: JOHN C. ARNOLD, XUEFENG HUA, RANGARAJAN JAGANNATHAN, STEFAN SCHMITZ
  • Patent number: 7595010
    Abstract: Adding at least one non-silicon precursor (such as a germanium precursor, a carbon precursor, etc.) during formation of a silicon nitride, silicon oxide, silicon oxynitride or silicon carbide film improves the deposition rate and/or makes possible tuning of properties of the film, such as tuning of the stress of the film. Also, in a doped silicon oxide or doped silicon nitride or other doped structure, the presence of the dopant may be used for measuring a signal associated with the dopant, as an etch-stop or otherwise for achieving control during etching.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: September 29, 2009
    Assignee: International Business Machines Corporation
    Inventors: Ashima B. Chakravarti, Judson Holt, Kevin K. Chan, Sadanand V. Deshpande, Rangarajan Jagannathan
  • Patent number: 7435652
    Abstract: Multiple integration schemes for manufacturing dual gate semiconductor structures are disclosed. By employing the novel integration schemes, polysilicon gate MOSFETs and high-k dielectric metal gate MOSFETs are formed on the same semiconductor substrate despite differences in the composition of the gate stack and resulting differences in the etch rates. A thin polysilicon layer is used for one type of gate electrodes and a silicon-containing layer are used for the other type of gate electrodes in these integration schemes to balance the different etch rates and to enable etching of the two different gate stacks.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: October 14, 2008
    Assignee: International Business Machines Corporation
    Inventors: Tze-chiang Chen, Bruce B. Doris, Rangarajan Jagannathan, Hongwen Yan, Qingyun Yang, Ying Zhang
  • Publication number: 20080242070
    Abstract: Multiple integration schemes for manufacturing dual gate semiconductor structures are disclosed. By employing the novel integration schemes, polysilicon gate MOSFETs and high-k dielectric metal gate MOSFETs are formed on the same semiconductor substrate despite differences in the composition of the gate stack and resulting differences in the etch rates. A thin polysilicon layer is used for one type of gate electrodes and a silicon-containing layer are used for the other type of gate electrodes in these integration schemes to balance the different etch rates and to enable etching of the two different gate stacks.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 2, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Tze-chiang Chen, Bruce B. Doris, Rangarajan Jagannathan, Hongwen Yan, Qingyun Yang, Ying Zhang
  • Patent number: 7384835
    Abstract: Disclosed are embodiments of a MOSFET with defined halos that are bound to defined source/drain extensions and a method of forming the MOSFET. A semiconductor layer is etched to form recesses that undercut a gate dielectric layer. A low energy implant forms halos. Then, a COR pre-clean is performed and the recesses are filled by epitaxial deposition. The epi can be in-situ doped or subsequently implanted to form source/drain extensions. Alternatively, the etch is immediately followed by the COR pre-clean, which is followed by epitaxial deposition to fill the recesses. During the epitaxial deposition process, the deposited material is doped to form in-situ doped halos and, then, the dopant is switched to form in-situ doped source/drain extensions adjacent to the halos. Alternatively, after the in-situ doped halos are formed the deposition process is performed without dopants and an implant is used to form source/drain extensions.
    Type: Grant
    Filed: May 25, 2006
    Date of Patent: June 10, 2008
    Assignee: International Business Machines Corporation
    Inventors: Huajie Chen, Judson R Holt, Rangarajan Jagannathan, Wesley C Natzle, Michael R Sievers, Richard S Wise
  • Publication number: 20080093629
    Abstract: Disclosed are embodiments of a MOSFET with defined halos that are bound to defined source/drain extensions and a method of forming the MOSFET. A semiconductor layer is etched to form recesses that undercut a gate dielectric layer. A low energy implant forms halos. Then, a COR pre-clean is performed and the recesses are filled by epitaxial deposition. The epi can be in-situ doped or subsequently implanted to form source/drain extensions. Alternatively, the etch is immediately followed by the COR pre-clean, which is followed by epitaxial deposition to fill the recesses. During the epitaxial deposition process, the deposited material is doped to form in-situ doped halos and, then, the dopant is switched to form in-situ doped source/drain extensions adjacent to the halos. Alternatively, after the in-situ doped halos are formed the deposition process is performed without dopants and an implant is used to form source/drain extensions.
    Type: Application
    Filed: December 13, 2007
    Publication date: April 24, 2008
    Applicant: International Business Machines Corporation
    Inventors: Huajie Chen, Judson Holt, Rangarajan Jagannathan, Wesley Natzle, Michael Sievers, Richard Wise
  • Patent number: 7361611
    Abstract: Adding at least one non-silicon precursor (such as a germanium precursor, a carbon precursor, etc.) during formation of a silicon nitride, silicon oxide, silicon oxynitride or silicon carbide film improves the deposition rate and/or makes possible tuning of properties of the film, such as tuning of the stress of the film. Also, in a doped silicon oxide or doped silicon nitride or other doped structure, the presence of the dopant may be used for measuring a signal associated with the dopant, as an etch-stop or otherwise for achieving control during etching.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: April 22, 2008
    Assignee: International Business Machines Corporation
    Inventors: Ashima B. Chakravarti, Judson Holt, Kevin K. Chan, Sadanand V. Deshpande, Rangarajan Jagannathan
  • Publication number: 20080054228
    Abstract: Adding at least one non-silicon precursor (such as a germanium precursor, a carbon precursor, etc.) during formation of a silicon nitride, silicon oxide, silicon oxynitride or silicon carbide film improves the deposition rate and/or makes possible tuning of properties of the film, such as tuning of the stress of the film. Also, in a doped silicon oxide or doped silicon nitride or other doped structure, the presence of the dopant may be used for measuring a signal associated with the dopant, as an etch-stop or otherwise for achieving control during etching.
    Type: Application
    Filed: October 26, 2007
    Publication date: March 6, 2008
    Inventors: Ashima Chakravarti, Judson Holt, Kevin Chan, Sadanand Deshpande, Rangarajan Jagannathan
  • Publication number: 20070275510
    Abstract: Disclosed are embodiments of a MOSFET with defined halos that are bound to defined source/drain extensions and a method of forming the MOSFET. A semiconductor layer is etched to form recesses that undercut a gate dielectric layer. A low energy implant forms halos. Then, a COR pre-clean is performed and the recesses are filled by epitaxial deposition. The epi can be in-situ doped or subsequently implanted to form source/drain extensions. Alternatively, the etch is immediately followed by the COR pre-clean, which is followed by epitaxial deposition to fill the recesses. During the epitaxial deposition process, the deposited material is doped to form in-situ doped halos and, then, the dopant is switched to form in-situ doped source/drain extensions adjacent to the halos. Alternatively, after the in-situ doped halos are formed the deposition process is performed without dopants and an implant is used to form source/drain extensions.
    Type: Application
    Filed: May 25, 2006
    Publication date: November 29, 2007
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Huajie Chen, Judson R. Holt, Rangarajan Jagannathan, Wesley C. Natzle, Michael R. Sievers, Richard S. Wise
  • Publication number: 20060237846
    Abstract: When forming a silicon nitride film from a nitrogen precursor, using a silicon precursor combination rather than a single silane precursor advantageously increases the deposition rate. For example, adding silane during formation of a silicon nitride film made using BTBAS and ammonia improves (increases) the deposition rate while still yielding a film with a favorably high stress.
    Type: Application
    Filed: July 5, 2006
    Publication date: October 26, 2006
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Ashima Chakravarti, Shawn Smith, Dominic Schepis, Rangarajan Jagannathan, Anita Madan