Patents by Inventor Hiroshi Nakatsuji

Hiroshi Nakatsuji 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: 8829526
    Abstract: Disclosed is a semiconductor device in which a thin film transistor and a thin film diode are provided on one same substrate, and the characteristics respectively required for the thin film transistor and the thin film diode are achieved. Specifically disclosed is a semiconductor device that includes an insulating layer (104) formed on the surface of a substrate (101), and a thin film transistor and a thin film diode that are formed on the insulating layer (104). A portion of the surface of the insulating layer (104), which is positioned below a semiconductor layer (109) for the thin film diode, is provided with a first recessed and projected pattern (105). Meanwhile, a portion of the surface of the insulating layer (104), which is positioned below a semiconductor layer (108) for the thin film transistor, is not provided with the first recessed and projected pattern (105).
    Type: Grant
    Filed: January 18, 2010
    Date of Patent: September 9, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hiroshi Nakatsuji
  • Patent number: 8686480
    Abstract: Disclosed is a method for manufacturing a semiconductor device that can improve the performance of a photodiode that is formed on a same substrate as a thin film transistor without greatly deteriorating the productivity of the semiconductor device. On a glass substrate 30, a base layer 31 having a recess 33b on the surface is formed, and on the base layer 31, an amorphous silicon thin film 42 is formed. The amorphous silicon thin film 42 is melted to form a crystalline silicon thin film 43, while moving the molten silicon into the recess 33b. Of the silicon thin film 43, a silicon film 11 that constitutes a portion of a thin film transistor 10 is formed of the silicon thin film 43 in a part other than the recess 33b, while a silicon film 21 that constitutes a portion of a photodiode 20 is formed of the silicon thin film 43 in the recess 33b.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: April 1, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tsuyoshi Itoh, Hiroshi Nakatsuji, Masahiro Fujiwara
  • Patent number: 8460954
    Abstract: A semiconductor device includes a thin film transistor and a thin film diode on a same substrate. A semiconductor layer (109) of the thin film transistor and a semiconductor layer (110) of the thin film diode are crystalline semiconductor layers formed by crystallizing the same non-crystalline semiconductor film. The thickness of the semiconductor layer (110) of the thin film diode is greater than the thickness of the semiconductor layer (109) of the thin film transistor, and the surface of the semiconductor layer (110) of the thin film diode is rougher than the surface of the semiconductor layer (109) of the thin film transistor.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: June 11, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masaki Yamanaka, Hiroshi Nakatsuji, Naoki Makita
  • Publication number: 20130099290
    Abstract: Disclosed is a method for manufacturing a semiconductor device that can improve the performance of a photodiode that is formed on a same substrate as a thin film transistor without greatly deteriorating the productivity of the semiconductor device. On a glass substrate 30, a base layer 31 having a recess 33b on the surface is formed, and on the base layer 31, an amorphous silicon thin film 42 is formed. The amorphous silicon thin film 42 is melted to form a crystalline silicon thin film 43, while moving the molten silicon into the recess 33b. Of the silicon thin film 43, a silicon film 11 that constitutes a portion of a thin film transistor 10 is formed of the silicon thin film 43 in a part other than the recess 33b, while a silicon film 21 that constitutes a portion of a photodiode 20 is formed of the silicon thin film 43 in the recess 33b.
    Type: Application
    Filed: April 6, 2011
    Publication date: April 25, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Tsuyoshi Itoh, Hiroshi Nakatsuji, Masahiro Fujiwara
  • Patent number: 8415678
    Abstract: A semiconductor device of the present invention is a semiconductor device including a thin film transistor and a thin film diode. A semiconductor layer (113) of the thin film transistor and a semiconductor layer (114) of the thin film diode are both crystalline semiconductor layers. The semiconductor layer (113) of the thin film transistor and the semiconductor layer (114) of the thin film diode respectively include portions formed by crystallizing the same amorphous semiconductor film. The thickness of the semiconductor layer (114) of the thin film diode is greater than the thickness of the semiconductor layer (113) of the thin film transistor. The difference between the thickness of the semiconductor layer (113) of the thin film transistor and the thickness of the semiconductor layer (114) of the thin film diode is greater than 25 nm.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: April 9, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masaki Yamanaka, Hiroshi Nakatsuji, Naoki Makita
  • Publication number: 20130078787
    Abstract: Disclosed is a method for manufacturing a semiconductor device, including the steps of: forming a first semiconductor film (2) and a second semiconductor film (4) over a glass substrate (6); forming a photosensitive resin over the glass substrate (6) to cover the first semiconductor film (2) and the second semiconductor film (4); conducting an exposure process in which controlled amounts of exposure radiation are projected to the photosensitive resin using a photomask; conducting a developing process on the photosensitive resin that was subjected to the exposure process, to form a first resist (40) over the first semiconductor film (2) and to form a second resist (41) over the second semiconductor film (4); implanting an n-type impurity into the first semiconductor film (2) using the first resist (40) and the second resist (41) as masks; and removing the first resist (40) and implanting a p-type impurity into the first semiconductor film (2) using the second resist (41) as a mask.
    Type: Application
    Filed: May 16, 2011
    Publication date: March 28, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Hiroshi Nakatsuji, Kazushige Hotta, Naoki Makita
  • Publication number: 20120068182
    Abstract: A semiconductor device of the present invention is a semiconductor device including a thin film transistor and a thin film diode. A semiconductor layer (113) of the thin film transistor and a semiconductor layer (114) of the thin film diode are both crystalline semiconductor layers. The semiconductor layer (113) of the thin film transistor and the semiconductor layer (114) of the thin film diode respectively include portions formed by crystallizing the same amorphous semiconductor film. The thickness of the semiconductor layer (114) of the thin film diode is greater than the thickness of the semiconductor layer (113) of the thin film transistor. The difference between the thickness of the semiconductor layer (113) of the thin film transistor and the thickness of the semiconductor layer (114) of the thin film diode is greater than 25 nm.
    Type: Application
    Filed: May 20, 2010
    Publication date: March 22, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Masaki Yamanaka, Hiroshi Nakatsuji, Naoki Makita
  • Publication number: 20110273390
    Abstract: Disclosed is a semiconductor device in which a thin film transistor and a thin film diode are provided on one same substrate, and the characteristics respectively required for the thin film transistor and the thin film diode are achieved. Specifically disclosed is a semiconductor device that includes an insulating layer (104) formed on the surface of a substrate (101), and a thin film transistor and a thin film diode that are formed on the insulating layer (104). A portion of the surface of the insulating layer (104), which is positioned below a semiconductor layer (109) for the thin film diode, is provided with a first recessed and projected pattern (105). Meanwhile, a portion of the surface of the insulating layer (104), which is positioned below a semiconductor layer (108) for the thin film transistor, is not provided with the first recessed and projected pattern (105).
    Type: Application
    Filed: January 18, 2010
    Publication date: November 10, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Hiroshi Nakatsuji
  • Publication number: 20110261019
    Abstract: A semiconductor device according to the present invention includes a thin-film transistor and a thin-film diode. The respective semiconductor layers and of the thin-film transistor and the thin-film diode are crystalline semiconductor layers that have been formed by crystallizing the same crystalline semiconductor film. Ridges have been formed on the surface of the semiconductor layer of the thin-film diode. And the semiconductor layer of the thin-film diode has a greater surface roughness than the semiconductor layer of the thin-film transistor.
    Type: Application
    Filed: October 20, 2009
    Publication date: October 27, 2011
    Inventors: Naoki Makita, Hiroshi Nakatsuji
  • Publication number: 20110198608
    Abstract: A semiconductor device includes a thin film transistor and a thin film diode on a same substrate. A semiconductor layer (109) of the thin film transistor and a semiconductor layer (110) of the thin film diode are crystalline semiconductor layers formed by crystallizing the same non-crystalline semiconductor film. The thickness of the semiconductor layer (110) of the thin film diode is greater than the thickness of the semiconductor layer (109) of the thin film transistor, and the surface of the semiconductor layer (110) of the thin film diode is rougher than the surface of the semiconductor layer (109) of the thin film transistor.
    Type: Application
    Filed: October 22, 2009
    Publication date: August 18, 2011
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Masaki Yamanaka, Hiroshi Nakatsuji, Naoki Makita
  • Patent number: 5043371
    Abstract: A resin composition comprises a polybutylene terephthalate, a halogenated bisimide having the formula (1) and a polytetrafluoroethylene resin and is improved in flame retardancy and at the same time moulding properties. It is useful for parts of electric instruments.
    Type: Grant
    Filed: February 14, 1989
    Date of Patent: August 27, 1991
    Assignee: Polyplastics Co., Ltd.
    Inventors: Michio Nakano, Hirouki Amono, Hiroshi Nakatsuji
  • Patent number: 4859741
    Abstract: A polyester composition is disclosed which includes a polyester, (a) a thermoplastic elastomer and (b) a carbodiimide compound having at least one carbodiimide group and which exhibits improved impact resistance at low temperatures and stability to heat, hot water and steam. The composition is useful to form parts which are exposed to low temperatures. A polyalkylene terephthalate resin composition is also disclosed which includes a polyalkylene terephthalate resin, (a) at least one selected from the group consisting of ethylene/alkyl acrylate and a thermoplastic polyester elastomer and (b) at least one selected from the group consisting of an epoxy resin containing at least two carbodiimide groups in the molecule.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: August 22, 1989
    Assignee: Polyplastics Co., Ltd.
    Inventors: Katsuhiko Takahashi, Tsuneyasu Nakashima, Hiroshi Nakatsuji, Hiroshi Okuda
  • Patent number: 4622385
    Abstract: After crude polyacetal polymers mainly comprising bonded oxymethylene groups in the main chain thereof were once molten, they are heated at temperatures of 80.degree. C. or above in liquid mediums, in which said crude polyacetal polymers are insoluble, with keeping a heterogeneous system after they were once molten.
    Type: Grant
    Filed: September 11, 1984
    Date of Patent: November 11, 1986
    Assignee: Polyplastics Company, Ltd.
    Inventors: Takeshi Asano, Tsuneyoshi Okada, Hiroshi Nakatsuji
  • Patent number: 4540773
    Abstract: A crude polyacetal polymer obtained by polymerization or copolymerization and having as a principal component thereof connected oxymethylene radicals in a main chain is treated in a non-soluble liquid medium at temperatures higher than 80.degree. C. but lower than the melting point of the polymer and at heterogeneous equilibrium, moving the crude polymer and the non-soluble medium in opposite directions relative to each other.
    Type: Grant
    Filed: September 11, 1984
    Date of Patent: September 10, 1985
    Assignee: Polyplastics Company, Ltd.
    Inventors: Hiroyasu Komazawa, Hiroshi Hotta, Hiroshi Nakatsuji, Kiyoshi Yoko, Seiichi Higashiyama, Tuneyasu Nakashima, Noboru Gotoh