Patents by Inventor Naoki Kotani

Naoki Kotani 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: 7646065
    Abstract: A semiconductor device includes: an isolation region formed in a semiconductor substrate; an active region surrounded by the isolation region in the semiconductor substrate; a gate insulating film formed on the active region; and a gate electrode formed across the boundary between the active region and the isolation region adjacent to the active region. The gate electrode includes a first portion which is located above the active region with the gate insulating film interposed therebetween and is entirely made of a silicide in a thickness direction and a second portion which is located above the isolation region and is made of a silicon region and the silicide region covering the silicon region.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: January 12, 2010
    Assignee: Panasonic Corporation
    Inventors: Naoki Kotani, Gen Okazaki, Shinji Takeoka, Junji Hirase, Akio Sebe, Kazuhiko Aida
  • Publication number: 20090298255
    Abstract: A semiconductor device including a SRAM section and a logic circuit section includes: a first n-type MIS transistor including a first n-type gate electrode formed with a first gate insulating film interposed on a first element formation region of a semiconductor substrate in the SRAM section; and a second n-type MIS transistor including a second n-type gate electrode formed with a second gate insulating film interposed on a second element formation region of the semiconductor substrate in the logic circuit section. A first impurity concentration of a first n-type impurity in the first n-type gate electrode is lower than a second impurity concentration of a second n-type impurity in the second n-type gate electrode.
    Type: Application
    Filed: August 11, 2009
    Publication date: December 3, 2009
    Applicant: Panasonic Corporation
    Inventors: Tokuhiko TAMAKI, Naoki Kotani, Shinji Takeoka
  • Publication number: 20090279039
    Abstract: A substrate for a display having, on a surface thereof, a sealing compound disposed along a periphery of the substrate spaced at a predetermined interval from an outer edge of a display part to which an oriented film is applied; and a convex portion or/and a concave portion, for preventing the applied oriented film from spreading to the sealing compound, provided between the sealing compound and the outer edge of the display part. The convex portion has a configuration of a bank continuous or uncontinuous, whereas the concave portion is formed as a plurality of independent portions arranged side by side or dotted between the outer edge of the display part and the sealing compound.
    Type: Application
    Filed: February 9, 2007
    Publication date: November 12, 2009
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Naoki Kotani, Kimio Takahashi
  • Publication number: 20090278210
    Abstract: A semiconductor device includes: a high dielectric constant gate insulating film formed on an active region in a substrate; a gate electrode formed on the high dielectric constant gate insulating film; and an insulating sidewall formed on each side surface of the gate electrode. The high dielectric constant gate insulating film is continuously formed so as to extend from under the gate electrode to under the insulating sidewall. At least part of the high dielectric constant gate insulating film located under the insulating sidewall has a smaller thickness than a thickness of part of the high dielectric constant gate insulating film located under the gate electrode.
    Type: Application
    Filed: July 20, 2009
    Publication date: November 12, 2009
    Applicant: PANASONIC CORPORATION
    Inventors: Junji HIRASE, Akio Sebe, Naoki Kotani, Gen Okazaki, Kazuhiko Aida, Shinji Takeoka
  • Patent number: 7598574
    Abstract: A semiconductor device including a SRAM section and a logic circuit section includes: a first n-type MIS transistor including a first n-type gate electrode formed with a first gate insulating film interposed on a first element formation region of a semiconductor substrate in the SRAM section; and a second n-type MIS transistor including a second n-type gate electrode formed with a second gate insulating film interposed on a second element formation region of the semiconductor substrate in the logic circuit section. A first impurity concentration of a first n-type impurity in the first n-type gate electrode is lower than a second impurity concentration of a second n-type impurity in the second n-type gate electrode.
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: October 6, 2009
    Assignee: Panasonic Corporation
    Inventors: Tokuhiko Tamaki, Naoki Kotani, Shinji Takeoka
  • Patent number: 7579227
    Abstract: A semiconductor device includes: a high dielectric constant gate insulating film formed on an active region in a substrate; a gate electrode formed on the high dielectric constant gate insulating film; and an insulating sidewall formed on each side surface of the gate electrode. The high dielectric constant gate insulating film is continuously formed so as to extend from under the gate electrode to under the insulating sidewall. At least part of the high dielectric constant gate insulating film located under the insulating sidewall has a smaller thickness than a thickness of part of the high dielectric constant gate insulating film located under the gate electrode.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: August 25, 2009
    Assignee: Panasonic Corporation
    Inventors: Junji Hirase, Akio Sebe, Naoki Kotani, Gen Okazaki, Kazuhiko Aida, Shinji Takeoka
  • Patent number: 7538397
    Abstract: A semiconductor device includes a resistor element covered by a silicon oxide film. In the semiconductor device, with respective gate electrodes of MIS transistors and impurity doped layers, i.e., non-silicide regions exposed, thermal treatment for activating an impurity and silicidization are performed. Thus, auto-doping of an impurity is suppressed, so that variations in a resistance value of a resistor are suppressed. Also, the gate electrodes of the MIS transistors and the like are exposed when thermal treatment for activating an impurity, and therefore breakdown of respective gate insulation films of the MIS transistors hardly occurs.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: May 26, 2009
    Assignee: Panasonic Corporation
    Inventor: Naoki Kotani
  • Patent number: 7456448
    Abstract: A semiconductor device, including a first MIS-type transistor formed in a first region of a semiconductor region, the first region being of a first conductivity type, the first MIS-type transistor including: a first gate insulating film formed on the first region; a first gate electrode formed on the first gate insulating film; a first extension diffusion layer of a second conductivity type formed in a region of the first region under and beside the first gate electrode; and a first fluorine diffusion layer formed in a first channel region of the first conductivity type sandwiched between portions of the first extension diffusion layer, wherein portions of the first fluorine diffusion layer extend from the first extension diffusion layer and overlap together in a region directly under the first gate electrode.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: November 25, 2008
    Assignee: Panasonic Corporation
    Inventors: Naoki Kotani, Akio Sebe, Gen Okazaki, Tokuhiko Tamaki
  • Publication number: 20080036010
    Abstract: A semiconductor device including a SRAM section and a logic circuit section includes: a first n-type MIS transistor including a first n-type gate electrode formed with a first gate insulating film interposed on a first element formation region of a semiconductor substrate in the SRAM section; and a second n-type MIS transistor including a second n-type gate electrode formed with a second gate insulating film interposed on a second element formation region of the semiconductor substrate in the logic circuit section. A first impurity concentration of a first n-type impurity in the first n-type gate electrode is lower than a second impurity concentration of a second n-type impurity in the second n-type gate electrode.
    Type: Application
    Filed: June 12, 2007
    Publication date: February 14, 2008
    Inventors: Tokuhiko Tamaki, Naoki Kotani, Shinji Takeoka
  • Publication number: 20080036013
    Abstract: The distance between a substrate contact portion and an active region in a p-type MIS transistor is greater than the distance between a substrate contact portion and an active region in an n-type MIS transistor. Alternatively, the length of a protruding part of a gate electrode of the p-type MIS transistor that protrudes from the p-type MIS transistor's active region toward the p-type MIS transistor's substrate contact portion is shorter than the length of a protruding part of a gate electrode of the n-type MIS transistor that protrudes from the n-type MIS transistor's active region toward the n-type MIS transistor's substrate contact portion. Alternatively, a part of the p-type MIS transistor's substrate contact portion that is located opposite the p-type MIS transistor's gate electrode has a lower impurity concentration than the other part thereof.
    Type: Application
    Filed: June 27, 2007
    Publication date: February 14, 2008
    Inventor: Naoki Kotani
  • Publication number: 20070200185
    Abstract: A high dielectric constant gate insulating film is formed on an active region of a substrate, and a gate electrode is formed on the high dielectric constant gate insulating film. A high dielectric constant insulating sidewall is formed on a side face of the gate electrode.
    Type: Application
    Filed: October 6, 2006
    Publication date: August 30, 2007
    Inventors: Junji Hirase, Naoki Kotani, Shinji Takeoka, Gen Okazaki, Akio Sebe, Kazuhiko Aida
  • Publication number: 20070173023
    Abstract: After gate insulating film formation films are formed in an element formation region of a semiconductor substrate, a gate electrode formation film is formed on the gate insulating film formation films. A fluorine-containing insulting film is formed on the gate electrode formation film. Then, thermal treatment is performed to diffuse and introduce the fluorine contained in the fluorine-containing insulating film to interfaces between the semiconductor substrate and the gate insulting film formation films.
    Type: Application
    Filed: October 2, 2006
    Publication date: July 26, 2007
    Inventors: Gen Okazaki, Naoki Kotani, Tokuhiko Tamaki, Akio Sebe
  • Publication number: 20070134898
    Abstract: After a Ni film is deposited on a substrate on which a gate silicon layer is formed, a mask is formed above the gate silicon layer. Then, the Ni film is etched so as to leave a part of the Ni film which is located on the gate silicon layer. This restricts sideways supply of Ni present on the sides of the gate silicon layer. Thereafter, thermal treatment is performed to silicidate the gate silicon layer entirely.
    Type: Application
    Filed: October 16, 2006
    Publication date: June 14, 2007
    Inventors: Shinji Takeoka, Junji Hirase, Akio Sebe, Naoki Kotani, Gen Okazaki, Kazuhiko Aida
  • Publication number: 20070132018
    Abstract: A semiconductor device, including a first MIS-type transistor formed in a first region of a semiconductor region, the first region being of a first conductivity type, the first MIS-type transistor including: a first gate insulating film formed on the first region; a first gate electrode formed on the first gate insulating film; a first extension diffusion layer of a second conductivity type formed in a region of the first region under and beside the first gate electrode; and a first fluorine diffusion layer formed in a first channel region of the first conductivity type sandwiched between portions of the first extension diffusion layer, wherein portions of the first fluorine diffusion layer extend from the first extension diffusion layer and overlap together in a region directly under the first gate electrode.
    Type: Application
    Filed: October 10, 2006
    Publication date: June 14, 2007
    Inventors: Naoki Kotani, Akio Sebe, Gen Okazaki, Tokuhiko Tamaki
  • Publication number: 20070096183
    Abstract: In a semiconductor device including a MIS transistor with a FUSI gate electrode and a polysilicon resistor, a portion of the polysilicon resistor provided in a contact formation region is silicided simultaneously with the gate electrode or an impurity diffusion region.
    Type: Application
    Filed: August 9, 2006
    Publication date: May 3, 2007
    Inventors: Hisashi Ogawa, Naoki Kotani, Susumu Akamatsu, Chiaki Kudo
  • Publication number: 20070090395
    Abstract: A MIS transistor includes a gate electrode portion, insulating sidewalls formed on side surfaces of the gate electrode portion, source/drain regions and a stress film formed so as to cover the gate electrode portion and the source/drain regions. A height of an upper surface of the gate electrode portion is smaller than a height of an upper edge of each of the insulating sidewalls. A thickness of first part of the stress film located on the gate electrode portion is larger than a thickness of second part of the stress film located on the source/drain regions.
    Type: Application
    Filed: September 22, 2006
    Publication date: April 26, 2007
    Inventors: Akio Sebe, Naoki Kotani, Shinji Takeoka, Gen Okazaki, Junji Hirase, Kazuhiko Aida
  • Publication number: 20070085151
    Abstract: Both a compressive-stress-applying insulating film and a tensile-stress-applying insulating film cover an N-type MIS transistor formed at an SRAM access region of a semiconductor substrate. On the other hand, a tensile-stress-applying insulating film covers an N-type MIS transistor formed at an SRAM drive region of the semiconductor substrate.
    Type: Application
    Filed: September 11, 2006
    Publication date: April 19, 2007
    Inventor: Naoki Kotani
  • Publication number: 20070080405
    Abstract: A semiconductor device includes: an isolation region formed in a semiconductor substrate; an active region surrounded by the isolation region in the semiconductor substrate; a gate insulating film formed on the active region; and a gate electrode formed across the boundary between the active region and the isolation region adjacent to the active region. The gate electrode includes a first portion which is located above the active region with the gate insulating film interposed therebetween and is entirely made of a silicide in a thickness direction and a second portion which is located above the isolation region and is made of a silicon region and the silicide region covering the silicon region.
    Type: Application
    Filed: October 4, 2006
    Publication date: April 12, 2007
    Inventors: Naoki Kotani, Gen Okazaki, Shinji Takeoka, Junji Hirase, Akio Sebe, Kazuhiko Aida
  • Publication number: 20070069304
    Abstract: A semiconductor device includes: a first element region and a second element region formed on a substrate to be adjacent to each other with an isolation region interposed therebetween; a first gate insulating film formed on the first element region; a second gate insulating film formed on the second element region; and a gate electrode continuously formed on the first gate insulating film, the isolation region and the second gate insulating film. The gate electrode includes a first silicided region formed to come into contact with the first gate insulating film, a second silicided region which is formed to come into contact with the second gate insulating film and is of a different composition from the first silicided region, and a conductive anti-diffusion region composed of a non-silicided region formed in a part of the gate electrode located on the isolation region and between the first element region and the second element region.
    Type: Application
    Filed: June 12, 2006
    Publication date: March 29, 2007
    Inventors: Kazuhiko Aida, Junji Hirase, Akio Sebe, Naoki Kotani, Shinji Takeoka, Gen Okazaki
  • Publication number: 20070063286
    Abstract: In a semiconductor device, a transistor in an N-type logic region NL is covered with a tensile stress applying film and a transistor in a P-type logic region PL is covered with a compressive stress applying film. Transistors in a P-type SRAM region PS and an N-type SRAM region NS are covered with an insulating film which applies lower stress than the stresses applied by the above-described two films.
    Type: Application
    Filed: July 24, 2006
    Publication date: March 22, 2007
    Inventor: Naoki Kotani