Patents by Inventor Akira Nishiyama

Akira Nishiyama 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: 8148787
    Abstract: There is disclosed a semiconductor device comprising a P-channel MIS transistor which includes an N-type semiconductor layer, a first gate insulating layer formed on the N-type semiconductor layer and containing a carbon compound of a metal, and an N-channel MIS transistor which includes a P-type semiconductor layer, a second gate insulating layer formed on the P-type semiconductor layer, and a second gate electrode formed on the second gate insulating layer.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: April 3, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masato Koyama, Akira Nishiyama, Yoshinori Tsuchiya, Reika Ichihara
  • Publication number: 20110275184
    Abstract: A semiconductor device includes a semiconductor substrate, an nMISFET formed on the substrate, the nMISFET including a first dielectric formed on the substrate and a first metal gate electrode formed on the first dielectric and formed of one metal element selected from Ti, Zr, Hf, Ta, Sc, Y, a lanthanoide and actinide series and of one selected from boride, silicide and germanide compounds of the one metal element, and a pMISFET formed on the substrate, the pMISFET including a second dielectric formed on the substrate and a second metal gate electrode formed on the second dielectric and made of the same material as that of the first metal gate electrode, at least a portion of the second dielectric facing the second metal gate electrode being made of an insulating material different from that of at least a portion of the first dielectric facing the first metal gate electrode.
    Type: Application
    Filed: July 15, 2011
    Publication date: November 10, 2011
    Inventors: Reika ICHIHARA, Yoshinori TSUCHIYA, Masato KOYAMA, Akira NISHIYAMA
  • Patent number: 8053300
    Abstract: A semiconductor device includes a semiconductor substrate, an nMISFET formed on the substrate, the nMISFET including a first dielectric formed on the substrate and a first metal gate electrode formed on the first dielectric and formed of one metal element selected from Ti, Zr, Hf, Ta, Sc, Y, a lanthanoide and actinide series and of one selected from boride, silicide and germanide compounds of the one metal element, and a pMISFET formed on the substrate, the pMISFET including a second dielectric formed on the substrate and a second metal gate electrode formed on the second dielectric and made of the same material as that of the first metal gate electrode, at least a portion of the second dielectric facing the second metal gate electrode being made of an insulating material different from that of at least a portion of the first dielectric facing the first metal gate electrode.
    Type: Grant
    Filed: August 20, 2007
    Date of Patent: November 8, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Reika Ichihara, Yoshinori Tsuchiya, Masato Koyama, Akira Nishiyama
  • Publication number: 20110266632
    Abstract: A semiconductor device includes a semiconductor substrate, an nMISFET formed on the substrate, the nMISFET including a first dielectric formed on the substrate and a first metal gate electrode formed on the first dielectric and formed of one metal element selected from Ti, Zr, Hf, Ta, Sc, Y, a lanthanoide and actinide series and of one selected from boride, silicide and germanide compounds of the one metal element, and a pMISFET formed on the substrate, the pMISFET including a second dielectric formed on the substrate and a second metal gate electrode formed on the second dielectric and made of the same material as that of the first metal gate electrode, at least a portion of the second dielectric facing the second metal gate electrode being made of an insulating material different from that of at least a portion of the first dielectric facing the first metal gate electrode.
    Type: Application
    Filed: July 15, 2011
    Publication date: November 3, 2011
    Inventors: Reika ICHIHARA, Yoshinori Tsuchiya, Masato Koyama, Akira Nishiyama
  • Patent number: 8030501
    Abstract: Aiming at production of an optically active 3-amino nitrogen-containing compound which is useful as an intermediate in synthesis of medicines and pesticides, in particular, an optically active 1-protected-3-aminopyrrolidine derivative, from an inexpensive and readily available raw material by a process which is efficient and can be practiced industrially, an optically active 3-amino nitrogen-containing compound is produced by performing a reaction of an optically active 3-substituted nitrogen-containing compound with ammonia, methylamine, ethylamine or dimethylamine in the presence of water. In addition, a 1-protected-3-aminopyrrolidine derivative is produced by performing a reaction of an optically active 1-protected-3-(sulfonyloxy)pyrrolidine derivative with ammonia, methylamine, ethylamine, or dimethylamine in the presence of methanol, ethanol, n-propanol, or isopropanol under a pressure of less than 30 barr.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: October 4, 2011
    Assignee: Kaneka Corporation
    Inventors: Masatoshi Ohnuki, Masashi Izumida, Akira Nishiyama, Shingo Matsumoto
  • Patent number: 8008147
    Abstract: It is possible to prevent the deterioration of device characteristic as much as possible. A semiconductor device includes: a semiconductor substrate; a gate insulating film provided above the semiconductor substrate and containing a metal, oxygen and an additive element; a gate electrode provided above the gate insulating film; and source/drain regions provided in the semiconductor substrate on both sides of the gate electrode. The additive element is at least one element selected from elements of Group 5, 6, 15, and 16 at a concentration of 0.003 atomic % or more but 3 atomic % or less.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: August 30, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuuichi Kamimuta, Akira Nishiyama, Yasushi Nakasaki, Tsunehiro Ino, Masato Koyama
  • Patent number: 7986014
    Abstract: A semiconductor device includes a semiconductor substrate, an nMISFET formed on the substrate, the nMISFET including a first dielectric formed on the substrate and a first metal gate electrode formed on the first dielectric and formed of one metal element selected from Ti, Zr, Hf, Ta, Sc, Y, a lanthanoide and actinide series and of one selected from boride, silicide and germanide compounds of the one metal element, and a pMISFET formed on the substrate, the pMISFET including a second dielectric formed on the substrate and a second metal gate electrode formed on the second dielectric and made of the same material as that of the first metal gate electrode, at least a portion of the second dielectric facing the second metal gate electrode being made of an insulating material different from that of at least a portion of the first dielectric facing the first metal gate electrode.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: July 26, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Reika Ichihara, Yoshinori Tsuchiya, Masato Koyama, Akira Nishiyama
  • Patent number: 7884416
    Abstract: A semiconductor integrated circuit according to an example of the present invention includes a semiconductor substrate, an element isolation insulating layer formed in a surface region of the semiconductor substrate, and first and second MIS type devices isolated from each other by the element isolation insulating layer and formed in adjacent first and second element regions in a second direction orthogonal to a first direction. Each of the first and second MIS type devices has a stack gate structure having a floating gate and a control gate electrode. The first MIS type device functions as an aging device, and the second MIS type device functions as a control device which controls an electric charge retention characteristic of the aging device.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: February 8, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Watanabe, Akira Nishiyama
  • Patent number: 7834190
    Abstract: An objective of the present application is to provide an industrially practicable method for producing an optically-active 3-amino-2-hydroxypropionic cyclopropylamide derivative or salt thereof from an inexpensive easily-available starting material. The derivative or salt thereof is useful as an intermediate for a medicine. It is also intended by the present application to provide a useful intermediate of the derivative. The objective is attained by the following method. First, an easily-available 2-halo-3-oxopropionic acid derivative is asymmetrically reduced, and then epoxidated to produce an optically-active epoxycarboxylic acid derivative. Next, the derivative is converted into an optically-active epoxyamide derivative by reaction with cyclopropylamine, and then reacted with a nitrile to obtain an optically-active oxazolinamide derivative. Subsequently, selective acid solvolysis of the oxazoline skeleton gives the optically-active 3-amino-2-hydroxypropionic cyclopropylamide derivative or salt thereof.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: November 16, 2010
    Assignee: Kaneka Corporation
    Inventors: Kohei Mori, Akira Nishiyama, Naoaki Taoka, Daisuke Moriyama, Nobuo Nagashima
  • Patent number: 7834408
    Abstract: It is possible to prevent the deterioration of device characteristic as much as possible. A semiconductor device includes: a semiconductor substrate; a gate insulating film provided above the semiconductor substrate and containing a metal, oxygen and an additive element; a gate electrode provided above the gate insulating film; and source/drain regions provided in the semiconductor substrate on both sides of the gate electrode. The additive element is at least one element selected from elements of Group 5, 6, 15, and 16 at a concentration of 0.003 atomic % or more but 3 atomic % or less.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: November 16, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuuichi Kamimuta, Akira Nishiyama, Yasushi Nakasaki, Tsunehiro Ino, Masato Koyama
  • Patent number: 7807426
    Abstract: The present invention relates to a process for producing an optically active 1,4-pentanediol by asymmetrically reducing 5-hydroxy-2-pentanone, which is easily available at low cost. The present invention also relates to a process for producing an optically active 1-substituted 2-methylpyrrolidine including sulfonylating the optically active 1,4-pentanediol to convert it to an optically active sulfonate compound, and reacting the compound with an amine. According to the processes of the present invention, an optically active 1,4-pentanediol and an optically active 1-substituted 2-methylpyrrolidine, which are useful as an intermediate for medicines and an intermediate for agricultural chemicals, can be simply produced from an inexpensive starting material.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: October 5, 2010
    Assignee: Kaneka Corporation
    Inventors: Akira Nishiyama, Naoaki Taoka, Narumi Kishimoto, Nobuo Nagashima
  • Publication number: 20100171184
    Abstract: A semiconductor device includes a semiconductor substrate, an nMISFET formed on the substrate, the nMISFET including a first dielectric formed on the substrate and a first metal gate electrode formed on the first dielectric and formed of one metal element selected from Ti, Zr, Hf, Ta, Sc, Y, a lanthanoide and actinide series and of one selected from boride, silicide and germanide compounds of the one metal element, and a pMISFET formed on the substrate, the pMISFET including a second dielectric formed on the substrate and a second metal gate electrode formed on the second dielectric and made of the same material as that of the first metal gate electrode, at least a portion of the second dielectric facing the second metal gate electrode being made of an insulating material different from that of at least a portion of the first dielectric facing the first metal gate electrode.
    Type: Application
    Filed: December 22, 2009
    Publication date: July 8, 2010
    Inventors: Reika Ichihara, Yoshinori Tsuchiya, Masato Koyama, Akira Nishiyama
  • Patent number: 7745888
    Abstract: A semiconductor device includes a substrate, a p-channel MIS transistor formed on an n-type well on the substrate, having a first gate dielectric and a first gate electrode formed thereon and formed of a Ta—C alloy wherein a crystal orientation ratio of a TaC (111) face in a film thickness direction [TaC (111) face/{TaC (111) face+TaC (200) face}] is 80% or more, and an n-channel MIS transistor formed on a p-type well on the substrate, having a second gate dielectric and a second gate electrode formed thereon and formed of a Ta—C alloy wherein a crystal orientation ratio of a TaC (111) face in a film thickness direction [TaC (111) face/{TaC (111) face+TaC (200) face}] is 60% or less.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: June 29, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masato Koyama, Reika Ichihara, Yoshinori Tsuchiya, Yuuichi Kamimuta, Akira Nishiyama
  • Publication number: 20100155851
    Abstract: There is disclosed a semiconductor device comprising a P-channel MIS transistor which includes an N-type semiconductor layer, a first gate insulating layer formed on the N-type semiconductor layer and containing a carbon compound of a metal, and an N-channel MIS transistor which includes a P-type semiconductor layer, a second gate insulating layer formed on the P-type semiconductor layer, and a second gate electrode formed on the second gate insulating layer.
    Type: Application
    Filed: March 9, 2010
    Publication date: June 24, 2010
    Inventors: Masato KOYAMA, Akira Nishiyama, Yoshinori Tsuchiya, Reika Ichihara
  • Patent number: 7728394
    Abstract: A semiconductor device includes a substrate, a p-channel MIS transistor formed on an n-type well on the substrate, having a first gate dielectric and a first gate electrode formed thereon and formed of a Ta—C alloy wherein a crystal orientation ratio of a TaC (111) face in a film thickness direction [TaC (111) face/{TaC (111) face+TaC (200) face}] is 80% or more, and an n-channel MIS transistor formed on a p-type well on the substrate, having a second gate dielectric and a second gate electrode formed thereon and formed of a Ta—C alloy wherein a crystal orientation ratio of a TaC (111) face in a film thickness direction [TaC (111) face/{TaC (111) face+TaC (200) face}] is 60% or less.
    Type: Grant
    Filed: September 10, 2008
    Date of Patent: June 1, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masato Koyama, Reika Ichihara, Yoshinori Tsuchiya, Yuuichi Kamimuta, Akira Nishiyama
  • Patent number: 7718521
    Abstract: There is disclosed a semiconductor device comprising a P-channel MIS transistor which includes an N-type semiconductor layer, a first gate insulating layer formed on the N-type semiconductor layer and containing a carbon compound of a metal, and an N-channel MIS transistor which includes a P-type semiconductor layer, a second gate insulating layer formed on the P-type semiconductor layer, and a second gate electrode formed on the second gate insulating layer.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: May 18, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masato Koyama, Akira Nishiyama, Yoshinori Tsuchiya, Reika Ichihara
  • Publication number: 20100105917
    Abstract: The present invention relates to a method for producing an optically active 3-aminopiperidine or salt thereof. In the method, a racemic nipecotamide is stereoselectively hydrolyzed to obtain an optically active nipecotamide and an optically active nipecotic acid in the presence of an enzyme source derived from an organism, and then the optically active nipecotamide is derived into an optically active aminopiperidine or salt thereof by aroylation, Hofmann rearrangement, deprotection of the amino group and further deprotection; or the optically active nipecotamide is derived into an optically active aminopiperidine or salt thereof by selective protection with BOC, Hofmann rearrangement and further deprotection. It is possible by the present invention to produce an optically active 3-aminopiperidine or salt thereof useful as a pharmaceutical intermediate from an inexpensive and easily available starting material by easy method applicable to industrial manufacturing.
    Type: Application
    Filed: February 18, 2008
    Publication date: April 29, 2010
    Applicant: KANEKA CORPORATION
    Inventors: Kohei Mori, Masutoshi Nojiri, Akira Nishiyama, Naoaki Taoka
  • Publication number: 20100087643
    Abstract: The objective of the present invention is to produce an optically active 2-arylpiperazine derivative useful as a synthetic intermediate for pharmaceutical products and agricultural chemicals from inexpensive and readily available starting material by an industrially practicable method. The objective can be accomplished by treating an optically active substituted aminodiol derivative produced from an optically active styrene oxide derivative with a sulfonating agent in the presence of a base, and then reacting an amine compound to obtain the 2-arylpiperazine derivative. Especially, an optically active 1-unsubstituted-2-arylpiperazine derivative can be produced by treating an optically active 1-allyl-2-arylpiperazine derivative with water in the presence of a transition metal catalyst for deallylation.
    Type: Application
    Filed: February 5, 2008
    Publication date: April 8, 2010
    Inventors: Masatoshi Ohnuki, Akira Nishiyama, Masaru Mitsuda
  • Publication number: 20100052035
    Abstract: A nonvolatile semiconductor memory apparatus includes: a source and drain regions formed at a distance from each other in a semiconductor layer; a first insulating film formed on the semiconductor layer located between the source region and the drain region, the first insulating film including a first insulating layer and a second insulating layer formed on the first insulating layer and having a higher dielectric constant than the first insulating layer, the second insulating layer having a first site performing hole trapping and releasing, the first site being formed by adding an element different from a base material to the second insulating film, the first site being located at a lower level than a Fermi level of a material forming the semiconductor layer; a charge storage film formed on the first insulating film; a second insulating film formed on the charge storage film; and a control gate electrode formed on the second insulating film.
    Type: Application
    Filed: March 13, 2009
    Publication date: March 4, 2010
    Inventors: Masahiro KOIKE, Yuichiro Mitani, Tatsuo Shimizu, Naoki Yasuda, Yasushi Nakasaki, Akira Nishiyama
  • Publication number: 20100048909
    Abstract: An objective of the present application is to provide an industrially practicable method for producing an optically-active 3-amino-2-hydroxypropionic cyclopropylamide derivative or salt thereof from an inexpensive easily-available starting material. The derivative or salt thereof is useful as an intermediate for a medicine. It is also intended by the present application to provide a useful intermediate of the derivative. The objective is attained by the following method. First, an easily-available 2-halo-3-oxopropionic acid derivative is asymmetrically reduced, and then epoxidated to produce an optically-active epoxycarboxylic acid derivative. Next, the derivative is converted into an optically-active epoxyamide derivative by reaction with cyclopropylamine, and then reacted with a nitrile to obtain an optically-active oxazolinamide derivative. Subsequently, selective acid solvolysis of the oxazoline skeleton gives the optically-active 3-amino-2-hydroxypropionic cyclopropylamide derivative or salt thereof.
    Type: Application
    Filed: May 22, 2007
    Publication date: February 25, 2010
    Inventors: Kohei Mori, Akira Nishiyama, Naoaki Taoka, Daisuke Moriyama, Nobuo Nagashima