Patents by Inventor Takaharu Itani

Takaharu Itani 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: 20140202387
    Abstract: A diffusion furnace includes a boat which supports a semiconductor wafer thereon and is rotatable together with the semiconductor wafer. A heater is arranged on the periphery of a core tube which houses the boat therein. The core tube includes a reaction gas supply pipe through which a reaction gas containing a dopant is supplied; and a cooling gas supply pipe through which a cooling gas is supplied toward an outer peripheral portion of the semiconductor wafer.
    Type: Application
    Filed: September 3, 2013
    Publication date: July 24, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshifumi NISHIO, Takashi NAKAO, Takaharu ITANI, Akihiro TAKAMI
  • Patent number: 8211785
    Abstract: A shallow p-n junction diffusion layer having a high activation rate of implanted ions, low resistivity, and a controlled leakage current is formed through annealing. Annealing after impurities have been doped is carried out through light irradiation. Those impurities are activated by annealing at least twice through light irradiation after doping impurities to a semiconductor substrate 11. The light radiations are characterized by usage of a W halogen lamp RTA or a flash lamp FLA except for the final light irradiation using a flash lamp FLA. Impurity diffusion may be controlled to a minimum, and crystal defects, which have developed in an impurity doping process, may be sufficiently reduced when forming ion implanted layers in a source and a drain extension region of the MOSFET or ion implanted layers in a source and a drain region.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: July 3, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takaharu Itani, Takayuki Ito, Kyoichi Suguro
  • Patent number: 8211796
    Abstract: A semiconductor device manufacturing method has conducting first heating processing at a first heating temperature in an inert atmosphere under a first pressure in a first process chamber to silicide an upper part of the source-drain diffusion layer and form a silicide film; conducting second heating processing at a second heating temperature in an oxidizing atmosphere under a second pressure in a second process chamber to selectively oxidize at least a surface of the metal film on the element isolating insulation film and form a metal oxide film; conducting third heating processing at a third heating temperature which is higher than the first heating temperature and the second heating temperature in an atmosphere in a third process chamber to increase a concentration of silicon in the silicide film; and selectively removing the metal oxide film and an unreacted part of the metal film on the element isolating insulation film.
    Type: Grant
    Filed: October 27, 2011
    Date of Patent: July 3, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takaharu Itani, Koji Matsuo, Kazuhiko Nakamura
  • Patent number: 8148717
    Abstract: A manufacturing method for semiconductor device includes: forming an opening, in a surface of a semiconductor substrate being composed of first atom, the opening having an opening ratio y to an area of the surface of the semiconductor substrate ranging from 5 to 30%; forming an epitaxial layer in the opening, the epitaxial layer being made of a mixed crystal containing a second atom in a concentration ranging from 15 to 25%, and the second atom having a lattice constant different from a lattice constant of the first atom; implanting impurity ion into the epitaxial layer; and performing activation annealing at a predetermined temperature T, the predetermined temperature T being equal to or higher than 1150° C. and satisfies a relationship of y?1E-5exp (21541/T).
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: April 3, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takayuki Ito, Yusuke Oshiki, Kouji Matsuo, Kenichi Yoshino, Takaharu Itani, Takuo Ohashi, Toshihiko Iinuma, Kiyotaka Miyano, Kunihiro Miyazaki
  • Publication number: 20120040526
    Abstract: A semiconductor device manufacturing method has conducting first heating processing at a first heating temperature in an inert atmosphere under a first pressure in a first process chamber to silicide an upper part of the source-drain diffusion layer and form a silicide film; conducting second heating processing at a second heating temperature in an oxidizing atmosphere under a second pressure in a second process chamber to selectively oxidize at least a surface of the metal film on the element isolating insulation film and form a metal oxide film; conducting third heating processing at a third heating temperature which is higher than the first heating temperature and the second heating temperature in an atmosphere in a third process chamber to increase a concentration of silicon in the silicide film; and selectively removing the metal oxide film and an unreacted part of the metal film on the element isolating insulation film.
    Type: Application
    Filed: October 27, 2011
    Publication date: February 16, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takaharu Itani, Koji Matsuo, Kazuhiko Nakamura
  • Patent number: 8101974
    Abstract: A semiconductor device subjected to an optical annealing process by radiation light whose principal wavelength is 1.5 ?m or less includes a circuit pattern region formed on a semiconductor substrate, and a dummy pattern region formed separately from the circuit pattern region on the semiconductor substrate. The circuit pattern region has an integrated circuit pattern containing a gate pattern related to a circuit operation. The dummy pattern region has dummy gate patterns that have the same structure as that of a gate pattern used in the integrated circuit pattern and the dummy gate patterns are repeatedly arranged with a pitch 0.4 times or less the principal wavelength.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: January 24, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Ohno, Takaharu Itani, Eiji Morifuji, Norikazu Ooishi, Toshihiko Iinuma, Yoshinori Honguh
  • Patent number: 8062973
    Abstract: A semiconductor device manufacturing method has conducting first heating processing at a first heating temperature in an inert atmosphere under a first pressure in a first process chamber to silicide an upper part of the source-drain diffusion layer and form a silicide film; conducting second heating processing at a second heating temperature in an oxidizing atmosphere under a second pressure in a second process chamber to selectively oxidize at least a surface of the metal film on the element isolating insulation film and form a metal oxide film; conducting third heating processing at a third heating temperature which is higher than the first heating temperature and the second heating temperature in an atmosphere in a third process chamber to increase a concentration of silicon in the silicide film; and selectively removing the metal oxide film and an unreacted part of the metal film on the element isolating insulation film.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: November 22, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takaharu Itani, Koji Matsuo, Kazuhiko Nakamura
  • Publication number: 20110127578
    Abstract: A manufacturing method for semiconductor device includes: forming an opening, in a surface of a semiconductor substrate being composed of first atom, the opening having an opening ratio y to an area of the surface of the semiconductor substrate ranging from 5 to 30%; forming an epitaxial layer in the opening, the epitaxial layer being made of a mixed crystal containing a second atom in a concentration ranging from 15 to 25%, and the second atom having a lattice constant different from a lattice constant of the first atom; implanting impurity ion into the epitaxial layer; and performing activation annealing at a predetermined temperature T, the predetermined temperature T being equal to or higher than 1150° C. and satisfies a relationship of y?1E-5exp (21541/T).
    Type: Application
    Filed: January 28, 2011
    Publication date: June 2, 2011
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takayuki Ito, Yusuke Oshiki, Kouji Matsuo, Kenichi Yoshino, Takaharu Itani, Takuo Ohashi, Toshihiko Iinuma, Kiyotaka Miyano, Kunihiro Miyazaki
  • Patent number: 7902030
    Abstract: A manufacturing method for semiconductor device includes: forming an opening, in a surface of a semiconductor substrate being composed of first atom, the opening having an opening ratio y to an area of the surface of the semiconductor substrate ranging from 5 to 30%; forming an epitaxial layer in the opening, the epitaxial layer being made of a mixed crystal containing a second atom in a concentration ranging from 15 to 25%, and the second atom having a lattice constant different from a lattice constant of the first atom; implanting impurity ion into the epitaxial layer; and performing activation annealing at a predetermined temperature T, the predetermined temperature T being equal to or higher than 1150° C. and satisfies a relationship of y?1E-5exp(21541/T).
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: March 8, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takayuki Ito, Yusuke Oshiki, Kouji Matsuo, Kenichi Yoshino, Takaharu Itani, Takuo Ohashi, Toshihiko Iinuma, Kiyotaka Miyano, Kunihiro Miyazaki
  • Publication number: 20100190336
    Abstract: A semiconductor device manufacturing method has conducting first heating processing at a first heating temperature in an inert atmosphere under a first pressure in a first process chamber to silicide an upper part of the source-drain diffusion layer and form a silicide film; conducting second heating processing at a second heating temperature in an oxidizing atmosphere under a second pressure in a second process chamber to selectively oxidize at least a surface of the metal film on the element isolating insulation film and form a metal oxide film; conducting third heating processing at a third heating temperature which is higher than the first heating temperature and the second heating temperature in an atmosphere in a third process chamber to increase a concentration of silicon in the silicide film; and selectively removing the metal oxide film and an unreacted part of the metal film on the element isolating insulation film.
    Type: Application
    Filed: January 25, 2010
    Publication date: July 29, 2010
    Inventors: Takaharu Itani, Koji Matsuo, Kazuhiko Nakamura
  • Patent number: 7643736
    Abstract: An apparatus for manufacturing a semiconductor device includes a treatment chamber in which a working substrate is disposed; a plurality of lamps provided above the treatment chamber; and a reflector provided behind the lamps relative to a direction towards the working substrate, spatially controlling an in-plane distribution of reflection rate of light beams from the lamps, and irradiating the working substrate with light from the lamps.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: January 5, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Takaharu Itani
  • Publication number: 20090309133
    Abstract: A manufacturing method for semiconductor device includes: forming an opening, in a surface of a semiconductor substrate being composed of first atom, the opening having an opening ratio y to an area of the surface of the semiconductor substrate ranging from 5 to 30%; forming an epitaxial layer in the opening, the epitaxial layer being made of a mixed crystal containing a second atom in a concentration ranging from 15 to 25%, and the second atom having a lattice constant different from a lattice constant of the first atom; implanting impurity ion into the epitaxial layer; and performing activation annealing at a predetermined temperature T, the predetermined temperature T being equal to or higher than 1150° C. and satisfies a relationship of y?1E-5exp(21541/T).
    Type: Application
    Filed: June 12, 2009
    Publication date: December 17, 2009
    Inventors: Takayuki Ito, Yusuke Oshiki, Kouji Matsuo, Kenichi Yoshino, Takaharu Itani, Takuo Ohashi, Toshihiko Iinuma, Kiyotaka Miyano, Kunihiro Miyazaki
  • Publication number: 20090146310
    Abstract: A semiconductor device subjected to an optical annealing process by radiation light whose principal wavelength is 1.5 ?m or less includes a circuit pattern region formed on a semiconductor substrate, and a dummy pattern region formed separately from the circuit pattern region on the semiconductor substrate. The circuit pattern region has an integrated circuit pattern containing a gate pattern related to a circuit operation. The dummy pattern region has dummy gate patterns that have the same structure as that of a gate pattern used in the integrated circuit pattern and the dummy gate patterns are repeatedly arranged with a pitch 0.4 times or less the principal wavelength.
    Type: Application
    Filed: December 4, 2008
    Publication date: June 11, 2009
    Inventors: Hiroshi Ohno, Takaharu Itani, Eiji Morifuji, Norikazu Ooishi, Toshihiko Iinuma, Yoshinori Honguh
  • Publication number: 20090137107
    Abstract: A method of manufacturing a semiconductor device according to an embodiment of the invention includes forming patterns on a substrate, depositing a light absorption layer on the patterns, processing the light absorption layer to form a first region which includes a first type of pattern included in the patterns and is coated with the light absorption layer having a first thickness, a second region which includes a second type of pattern included in the patterns and is coated with the light absorption layer having a second thickness thinner than the first thickness, and a third region which includes a third type of pattern included in the patterns and is coated with the light absorption layer having a third thickness thinner than the second thickness, and annealing the substrate by radiating light on the substrate.
    Type: Application
    Filed: November 26, 2008
    Publication date: May 28, 2009
    Inventor: Takaharu Itani
  • Publication number: 20080268660
    Abstract: A method of manufacturing a semiconductor device that involves a heat treatment of a semiconductor substrate, has removing a superficial layer from an upper surface of an edge part of said semiconductor substrate, a bevel surface of the edge part of said semiconductor substrate and a side surface of the edge part of said semiconductor substrate; and conducting the heat treatment of said semiconductor substrate by irradiating said semiconductor substrate with light having a pulse width of 0.1 milliseconds to 100 milliseconds from a light source after said superficial layer is removed.
    Type: Application
    Filed: April 24, 2008
    Publication date: October 30, 2008
    Inventors: Takaharu Itani, Kenichi Yoshino, Takayuki Ito, Takashi Kawakami, Tetsuya Kugimiya
  • Publication number: 20080260501
    Abstract: A shallow p-n junction diffusion layer having a high activation rate of implanted ions, low resistivity, and a controlled leakage current is formed through annealing. Annealing after impurities have been doped is carried out through light irradiation. Those impurities are activated by annealing at least twice through light irradiation after doping impurities to a semiconductor substrate 11. The light radiations are characterized by usage of a W halogen lamp RTA or a flash lamp FLA except for the final light irradiation using a flash lamp FLA. Impurity diffusion may be controlled to a minimum, and crystal defects, which have developed in an impurity doping process, may be sufficiently reduced when forming ion implanted layers in a source and a drain extension region of the MOSFET or ion implanted layers in a source and a drain region.
    Type: Application
    Filed: June 29, 2007
    Publication date: October 23, 2008
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Takaharu Itani, Takayuki Ito, Kyoichi Suguro
  • Publication number: 20070243701
    Abstract: An impurity is ion-implanted into the major surface of an Si substrate having a bulk microdefect density of 5×106 to 5×107 cm?3, a bulk microdefect size smaller than 100 nm, and a dissolved oxygen concentration of 1.1×1018 to 1.2×1018 cm?3. The Si substrate then undergoes ultra-rapid thermal annealing whose heating/cooling rate is higher than 1×105° C./sec, thereby electrically activating the impurity to form at least a partial impurity diffusion layer of a semiconductor element.
    Type: Application
    Filed: April 5, 2007
    Publication date: October 18, 2007
    Inventors: Takayuki Ito, Kyoichi Suguro, Takaharu Itani, Yoshihiko Saito
  • Patent number: 7279405
    Abstract: A shallow p-n junction diffusion layer having a high activation rate of implanted ions, low resistivity, and a controlled leakage current is formed through annealing. Annealing after impurities have been doped is carried out through light irradiation. Those impurities are activated by annealing at least twice through light irradiation after doping impurities to a semiconductor substrate 11. The light radiations are characterized by usage of a W halogen lamp RTA or a flash lamp FLA except for the final light irradiation using a flash lamp FLA. Impurity diffusion maybe controlled to a minimum, and crystal defects, which have developed in an impurity doping process, may be sufficiently reduced when forming ion implanted layers in a source and a drain extension region of the MOSFET or ion implanted layers in a source and a drain region.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: October 9, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takaharu Itani, Takayuki Ito, Kyoichi Suguro
  • Publication number: 20070232083
    Abstract: An apparatus for manufacturing a semiconductor device includes a treatment chamber in which a working substrate is disposed; a plurality of lamps provided above the treatment chamber; and a reflector provided behind the lamps relative to a direction towards the working substrate, spatially controlling an in-plane distribution of reflection rate of light beams from the lamps, and irradiating the working substrate with light from the lamps.
    Type: Application
    Filed: March 27, 2007
    Publication date: October 4, 2007
    Inventor: Takaharu Itani
  • Patent number: 7084068
    Abstract: An annealing furnace, includes a processing chamber configured to store a substrate; a susceptor located in the processing chamber so as to load the substrate and having an auxiliary heater for heating the substrate at 650° C. or less, the susceptor having a surface being made of quartz; a gas supply system configured to supply a gas required for a thermal processing on the substrate in parallel to a surface of the substrate; a transparent window located on an upper part of the processing chamber facing the susceptor; and a main heater configured to irradiate a pulsed light on the surface of the substrate to heat the substrate from the transparent window, the pulsed light having a pulse duration of approximately 0.1 ms to 200 ms and having a plurality of emission wavelengths.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: August 1, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kyoichi Suguro, Takayuki Ito, Takaharu Itani