Patents by Inventor Takaaki Tsunomura

Takaaki Tsunomura 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: 20230282647
    Abstract: On a semiconductor substrate having an SOI region and a bulk silicon region formed on its upper surface, epitaxial layers are formed in source and drain regions of a MOSFET formed in the SOI region, and no epitaxial layer is formed in source and drain regions of a MOSFET formed in the bulk silicon region. By covering the end portions of the epitaxial layers with silicon nitride films, even when diffusion layers are formed by implanting ions from above the epitaxial layers, it is possible to prevent the impurity ions from being implanted down to a lower surface of a silicon layer.
    Type: Application
    Filed: May 15, 2023
    Publication date: September 7, 2023
    Inventors: Takaaki TSUNOMURA, Yoshiki YAMAMOTO, Masaaki SHINOHARA, Toshiaki IWAMATSU, Hidekazu ODA
  • Publication number: 20230253456
    Abstract: Occurrence of short-channel characteristics and parasitic capacitance of a MOSFET on a SOI substrate is prevented. A sidewall having a stacked structure obtained by sequentially stacking a silicon oxide film and a nitride film is formed on a side wall of a gate electrode on the SOI substrate. Subsequently, after an epitaxial layer is formed beside the gate electrode, and then, the nitride film is removed. Then, an impurity is implanted into an upper surface of the semiconductor substrate with using the gate electrode and the epitaxial layer as a mask, so that a halo region is formed in only a region of the upper surface of the semiconductor substrate which is right below a vicinity of both ends of the gate electrode.
    Type: Application
    Filed: April 17, 2023
    Publication date: August 10, 2023
    Inventors: Yoshiki YAMAMOTO, Hideki MAKIYAMA, Toshiaki IWAMATSU, Takaaki TSUNOMURA
  • Patent number: 11700778
    Abstract: A method of controlling the forming voltage of a dielectric film in a resistive random access memory (ReRAM) device. The method includes depositing a dielectric film contains intrinsic defects on a substrate, forming a plasma-excited treatment gas containing H2 gas, and exposing the dielectric film to the plasma-excited treatment gas to create additional defects in the dielectric film without substantially changing a physical thickness of the dielectric film, where the additional defects lower the forming voltage needed for generating an electrically conducting filament across the dielectric film. The dielectric film can include a metal oxide film and the plasma-excited treatment gas may be formed using a microwave plasma source.
    Type: Grant
    Filed: April 9, 2021
    Date of Patent: July 11, 2023
    Assignee: Tokyo Electron Limited
    Inventors: Steven Consiglio, Cory Wajda, Kandabara Tapily, Takaaki Tsunomura, Takashi Ando, Paul C. Jamison, Eduard A. Cartier, Vijay Narayanan, Marinus J. P. Hopstaken
  • Patent number: 11695012
    Abstract: On a semiconductor substrate having an SOI region and a bulk silicon region formed on its upper surface, epitaxial layers are formed in source and drain regions of a MOSFET formed in the SOI region, and no epitaxial layer is formed in source and drain regions of a MOSFET formed in the bulk silicon region. By covering the end portions of the epitaxial layers with silicon nitride films, even when diffusion layers are formed by implanting ions from above the epitaxial layers, it is possible to prevent the impurity ions from being implanted down to a lower surface of a silicon layer.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: July 4, 2023
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Takaaki Tsunomura, Yoshiki Yamamoto, Masaaki Shinohara, Toshiaki Iwamatsu, Hidekazu Oda
  • Patent number: 11658211
    Abstract: Occurrence of short-channel characteristics and parasitic capacitance of a MOSFET on a SOI substrate is prevented. A sidewall having a stacked structure obtained by sequentially stacking a silicon oxide film and a nitride film is formed on a side wall of a gate electrode on the SOI substrate. Subsequently, after an epitaxial layer is formed beside the gate electrode, and then, the nitride film is removed. Then, an impurity is implanted into an upper surface of the semiconductor substrate with using the gate electrode and the epitaxial layer as a mask, so that a halo region is formed in only a region of the upper surface of the semiconductor substrate which is right below a vicinity of both ends of the gate electrode.
    Type: Grant
    Filed: April 7, 2021
    Date of Patent: May 23, 2023
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Yoshiki Yamamoto, Hideki Makiyama, Toshiaki Iwamatsu, Takaaki Tsunomura
  • Publication number: 20210257459
    Abstract: Occurrence of short-channel characteristics and parasitic capacitance of a MOSFET on a SOI substrate is prevented. A sidewall having a stacked structure obtained by sequentially stacking a silicon oxide film and a nitride film is formed on a side wall of a gate electrode on the SOI substrate. Subsequently, after an epitaxial layer is formed beside the gate electrode, and then, the nitride film is removed. Then, an impurity is implanted into an upper surface of the semiconductor substrate with using the gate electrode and the epitaxial layer as a mask, so that a halo region is formed in only a region of the upper surface of the semiconductor substrate which is right below a vicinity of both ends of the gate electrode.
    Type: Application
    Filed: April 7, 2021
    Publication date: August 19, 2021
    Inventors: Yoshiki YAMAMOTO, Hideki MAKIYAMA, Toshiaki IWAMATSU, Takaaki TSUNOMURA
  • Publication number: 20210234096
    Abstract: A method of controlling the forming voltage of a dielectric film in a resistive random access memory (ReRAM) device. The method includes depositing a dielectric film contains intrinsic defects on a substrate, forming a plasma-excited treatment gas containing H2 gas, and exposing the dielectric film to the plasma-excited treatment gas to create additional defects in the dielectric film without substantially changing a physical thickness of the dielectric film, where the additional defects lower the forming voltage needed for generating an electrically conducting filament across the dielectric film. The dielectric film can include a metal oxide film and the plasma-excited treatment gas may be formed using a microwave plasma source.
    Type: Application
    Filed: April 9, 2021
    Publication date: July 29, 2021
    Inventors: Steven Consiglio, Cory Wajda, Kandabara Tapily, Takaaki Tsunomura, Takashi Ando, Paul C. Jamison, Eduard A. Cartier, Vijay Narayanan, Marinus J.P. Hopstaken
  • Patent number: 10991881
    Abstract: A method of controlling the forming voltage of a dielectric film in a resistive random access memory (ReRAM) device. The method includes depositing a dielectric film contains intrinsic defects on a substrate, forming a plasma-excited treatment gas containing H2 gas, and exposing the dielectric film to the plasma-excited treatment gas to create additional defects in the dielectric film without substantially changing a physical thickness of the dielectric film, where the additional defects lower the forming voltage needed for generating an electrically conducting filament across the dielectric film. The dielectric film can include a metal oxide film and the plasma-excited treatment gas may be formed using a microwave plasma source.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: April 27, 2021
    Assignee: Tokyo Electron Limited
    Inventors: Steven Consiglio, Cory Wajda, Kandabara Tapily, Takaaki Tsunomura, Takashi Ando, Paul C. Jamison, Eduard A. Cartier, Vijay Narayanan, Marinus J. P. Hopstaken
  • Publication number: 20200381624
    Abstract: A method of controlling the forming voltage of a dielectric film in a resistive random access memory (ReRAM) device. The method includes depositing a dielectric film contains intrinsic defects on a substrate, forming a plasma-excited treatment gas containing H2 gas, and exposing the dielectric film to the plasma-excited treatment gas to create additional defects in the dielectric film without substantially changing a physical thickness of the dielectric film, where the additional defects lower the forming voltage needed for generating an electrically conducting filament across the dielectric film. The dielectric film can include a metal oxide film and the plasma-excited treatment gas may be formed using a microwave plasma source.
    Type: Application
    Filed: May 31, 2019
    Publication date: December 3, 2020
    Inventors: Steven Consiglio, Cory Wajda, Kandabara Tapily, Takaaki Tsunomura, Takashi Ando, Paul C. Jamison, Eduard A. Cartier, Vijay Narayanan, Marinus J.P. Hopstaken
  • Publication number: 20200343268
    Abstract: On a semiconductor substrate having an SOI region and a bulk silicon region formed on its upper surface, epitaxial layers are formed in source and drain regions of a MOSFET formed in the SOI region, and no epitaxial layer is formed in source and drain regions of a MOSFET formed in the bulk silicon region. By covering the end portions of the epitaxial layers with silicon nitride films, even when diffusion layers are formed by implanting ions from above the epitaxial layers, it is possible to prevent the impurity ions from being implanted down to a lower surface of a silicon layer.
    Type: Application
    Filed: July 14, 2020
    Publication date: October 29, 2020
    Inventors: Takaaki TSUNOMURA, Yoshiki YAMAMOTO, Masaaki SHINOHARA, Toshiaki IWAMATSU, Hidekazu ODA
  • Patent number: 10756115
    Abstract: On a semiconductor substrate having an SOI region and a bulk silicon region formed on its upper surface, epitaxial layers are formed in source and drain regions of a MOSFET formed in the SOI region, and no epitaxial layer is formed in source and drain regions of a MOSFET formed in the bulk silicon region. By covering the end portions of the epitaxial layers with silicon nitride films, even when diffusion layers are formed by implanting ions from above the epitaxial layers, it is possible to prevent the impurity ions from being implanted down to a lower surface of a silicon layer.
    Type: Grant
    Filed: October 31, 2019
    Date of Patent: August 25, 2020
    Assignee: Renesas Electronics Corporation
    Inventors: Takaaki Tsunomura, Yoshiki Yamamoto, Masaaki Shinohara, Toshiaki Iwamatsu, Hidekazu Oda
  • Publication number: 20200066757
    Abstract: On a semiconductor substrate having an SOI region and a bulk silicon region formed on its upper surface, epitaxial layers are formed in source and drain regions of a MOSFET formed in the SOI region, and no epitaxial layer is formed in source and drain regions of a MOSFET formed in the bulk silicon region. By covering the end portions of the epitaxial layers with silicon nitride films, even when diffusion layers are formed by implanting ions from above the epitaxial layers, it is possible to prevent the impurity ions from being implanted down to a lower surface of a silicon layer.
    Type: Application
    Filed: October 31, 2019
    Publication date: February 27, 2020
    Inventors: Takaaki TSUNOMURA, Yoshiki YAMAMOTO, Masaaki SHINOHARA, Toshiaki IWAMATSU, Hidekazu ODA
  • Publication number: 20200013857
    Abstract: Occurrence of short-channel characteristics and parasitic capacitance of a MOSFET on a SOI substrate is prevented. A sidewall having a stacked structure obtained by sequentially stacking a silicon oxide film and a nitride film is formed on a side wall of a gate electrode on the SOI substrate. Subsequently, after an epitaxial layer is formed beside the gate electrode, and then, the nitride film is removed. Then, an impurity is implanted into an upper surface of the semiconductor substrate with using the gate electrode and the epitaxial layer as a mask, so that a halo region is formed in only a region of the upper surface of the semiconductor substrate which is right below a vicinity of both ends of the gate electrode.
    Type: Application
    Filed: September 19, 2019
    Publication date: January 9, 2020
    Applicant: Renesas Electronics Corporation
    Inventors: Yoshiki YAMAMOTO, Hideki MAKIYAMA, Toshiaki IWAMATSU, Takaaki TSUNOMURA
  • Patent number: 10510775
    Abstract: On a semiconductor substrate having an SOI region and a bulk silicon region formed on its upper surface, epitaxial layers are formed in source and drain regions of a MOSFET formed in the SOI region, and no epitaxial layer is formed in source and drain regions of a MOSFET formed in the bulk silicon region. By covering the end portions of the epitaxial layers with silicon nitride films, even when diffusion layers are formed by implanting ions from above the epitaxial layers, it is possible to prevent the impurity ions from being implanted down to a lower surface of a silicon layer.
    Type: Grant
    Filed: September 5, 2017
    Date of Patent: December 17, 2019
    Assignee: Renesas Electronics Corporation
    Inventors: Takaaki Tsunomura, Yoshiki Yamamoto, Masaaki Shinohara, Toshiaki Iwamatsu, Hidekazu Oda
  • Publication number: 20190333763
    Abstract: A method of area selective deposition for cap layer formation in advanced semiconductor contacts. The method includes providing a planarized substrate including a first dielectric layer and a first metal layer, oxidizing a surface of the first metal layer to form an oxidized metal layer, and selectively depositing a second dielectric layer on the oxidized metal layer. The selectively depositing the second dielectric layer can include moving the planarized substrate below a gas inlet dispensing a deposition gas during a spatial vapor phase deposition process, where the deposition gas is preferentially exposed to the oxidized metal layer extending above a surface of the first dielectric layer.
    Type: Application
    Filed: April 26, 2019
    Publication date: October 31, 2019
    Inventors: Kandabara Tapily, Gerrit Leusink, Takaaki Tsunomura
  • Patent number: 10461158
    Abstract: Occurrence of short-channel characteristics and parasitic capacitance of a MOSFET on a SOI substrate is prevented. A sidewall having a stacked structure obtained by sequentially stacking a silicon oxide film and a nitride film is formed on a side wall of a gate electrode on the SOI substrate. Subsequently, after an epitaxial layer is formed beside the gate electrode, and then, the nitride film is removed. Then, an impurity is implanted into an upper surface of the semiconductor substrate with using the gate electrode and the epitaxial layer as a mask, so that a halo region is formed in only a region of the upper surface of the semiconductor substrate which is right below a vicinity of both ends of the gate electrode.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: October 29, 2019
    Assignee: Renesas Electronics Corporation
    Inventors: Yoshiki Yamamoto, Hideki Makiyama, Toshiaki Iwamatsu, Takaaki Tsunomura
  • Publication number: 20190311947
    Abstract: A method of fabricating air gaps in advanced semiconductor devices for low capacitance interconnects. The method includes exposing a substrate to a gas pulse sequence to deposit a material that forms an air gap between raised features.
    Type: Application
    Filed: April 9, 2019
    Publication date: October 10, 2019
    Inventors: Kandabara Tapily, Takaaki Tsunomura
  • Patent number: 10410858
    Abstract: Embodiments of the invention provide selective film deposition in a recessed feature of a substrate using halogen deactivation. A substrate processing method includes a) providing a substrate containing a field area and a recessed feature having a sidewall and a bottom, b) exposing the substrate to a first precursor gas to form a first precursor layer on the substrate, c) exposing the substrate to a plasma-excited halogen-containing gas to deactivate or at least partially remove the first precursor layer on the field area of the substrate and the bottom of the recessed feature, and d) exposing the substrate to a second precursor gas that reacts with the first precursor layer to form a material layer on the sidewall of the recessed feature but not on the field area and the bottom of the recessed feature that has been deactivated by the plasma-excited halogen-containing gas.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: September 10, 2019
    Assignee: Tokyo Electron Limited
    Inventors: Kandabara N. Tapily, Takaaki Tsunomura
  • Patent number: 10411112
    Abstract: A semiconductor device having an n channel MISFET formed on an SOI substrate including a support substrate, an insulating layer formed on the support substrate and a silicon layer formed on the insulating layer has the following structure. An impurity region for threshold adjustment is provided in the support substrate of a gate electrode so that the silicon layer contains carbon. The threshold value can be adjusted by the semiconductor region for threshold adjustment in this manner. Further, by providing the silicon layer containing carbon, even when the impurity of the semiconductor region for threshold adjustment is diffused to the silicon layer across the insulating layer, the impurity is inactivated by the carbon implanted into the silicon layer. As a result, the fluctuation of the transistor characteristics, for example, the fluctuation of the threshold voltage of the MISFET can be reduced.
    Type: Grant
    Filed: June 27, 2017
    Date of Patent: September 10, 2019
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Takaaki Tsunomura, Toshiaki Iwamatsu
  • Patent number: 10263078
    Abstract: Occurrence of short-channel characteristics and parasitic capacitance of a MOSFET on a SOI substrate is prevented. A sidewall having a stacked structure obtained by sequentially stacking a silicon oxide film and a nitride film is formed on a side wall of a gate electrode on the SOI substrate. Subsequently, after an epitaxial layer is formed beside the gate electrode, and then, the nitride film is removed. Then, an impurity is implanted into an upper surface of the semiconductor substrate with using the gate electrode and the epitaxial layer as a mask, so that a halo region is formed in only a region of the upper surface of the semiconductor substrate which is right below a vicinity of both ends of the gate electrode.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: April 16, 2019
    Assignee: Renesas Electronics Corporation
    Inventors: Yoshiki Yamamoto, Hideki Makiyama, Toshiaki Iwamatsu, Takaaki Tsunomura