Patents by Inventor Naoki Yasuda

Naoki Yasuda 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: 20040119132
    Abstract: A dielectric separation type semiconductor device of high voltage withstanding capability includes a primary dielectric layer (3-1) on a first surface of a semiconductor substrate (1), a first semiconductor layer (2) of first conductivity type disposed oppositely to the substrate (1) with the primary dielectric layer (3-1) sandwiched, a second semiconductor layer (4) of first conductivity type on the first semiconductor layer (2), a third semiconductor layer (5) of second conductivity type surrounding peripherally the first semiconductor layer (2), a ring-like insulation film (9) surrounding peripherally the third semiconductor layer (5), a first electrode (6) on the second semiconductor layer (4), a second electrode (7) on the third semiconductor layer (5), a back-surface electrode (8) deposited on a second surface of the substrate (1), and a first auxiliary dielectric layer (3-2) disposed immediately below the second semiconductor layer (4), being junctioned to the second surface.
    Type: Application
    Filed: July 7, 2003
    Publication date: June 24, 2004
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Hajime Akiyama, Naoki Yasuda
  • Patent number: 6732583
    Abstract: The present invention provides a sensor element having a sensor substrate and a sensing portion supported by the sensor substrate. A resin film is provided between the sensor substrate and the sensing portion. The resin film has a high heat resistance to the temperature of the fabrication process and the use of sensor element, has excellent coverage of a three-dimensional structure, has a flat surface, applies a low stress to the sensing portion, is formed at low temperature, and prevents the sensing portion from being adversely affected in its fabrication process.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: May 11, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Naoki Yasuda, Tatsuya Fukami, Motohisa Taguchi, Yuji Kawano
  • Patent number: 6703132
    Abstract: The invention provides a sensor element having a sensor substrate and a flat sensor portion supported by the sensor substrate in which the surface of the flat sensing portion is covered with a silicone resin film. The silicone resin film is excellent in step coverage of the flat sensing portion, having low stress applied to the sensing portion, can be formed at low temperature and can prevent the sensing portion from being effected with adverse influence even in the fabrication steps.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: March 9, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Naoki Yasuda, Tatsuya Fukami, Motohisa Taguchi, Yuji Kawano
  • Publication number: 20040018646
    Abstract: A resist pattern formation method is characterized in that, after a resist pattern is formed on a wafer, a residue generated between resist sidewalls forming the resist pattern is irradiated with an electron beam under a reduced pressure. It is also preferable to detect the residue with pattern defect inspection equipment, and irradiate the detected residue site with an electron beam under a reduced pressure using an electron microscope. The reduced pressure is preferably equal to or lower than 5.0×102 Pa, and an acceleration voltage is preferably equal to or lower than 1200 V. A manufacturing method of a semiconductor device according to the present invention uses the above-described formation method to form a resist pattern. Thus, the residue generated between resist sidewalls can be removed without varying a dimension of a resist pattern spacing.
    Type: Application
    Filed: January 2, 2003
    Publication date: January 29, 2004
    Applicants: Mitsubishi Denki Kabushiki Kaisha, Ryoden Semiconductor System Engineering Corporation
    Inventors: Shinji Tarutani, Toshiyuki Toyoshima, Takeo Ishibashi, Yuuko Odamura, Naoki Yasuda
  • Patent number: 6656982
    Abstract: There is disclosed a woody thermoplastic resin composition which prevents the occurrence of rust on the metal surface in a molding machine and suppresses the generation of a volatile substance as encountered when a woody thermoplastic resin composed of a thermoplastic resin and wood flour was subjected to heat molding and processing. According to the present invention, a specific amount of dolomite is added to a woody thermoplastic resin composed of a thermoplastic resin and wood flour thereby there may be obtained a woody thermoplastic resin composition which has an effect to prevent the occurrence of rust on the metal surface in a molding machine during the molding and processing and to suppress the generation of a volatile substance.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: December 2, 2003
    Assignee: Ajinomoto Co., Inc.
    Inventors: Naoki Yasuda, Yoshihito Anzai, Hirokazu Ohno, Shigeto Yoshimura, Michihiro Kubo
  • Publication number: 20030197503
    Abstract: The present invention provides a magnetoresistive sensor device including a substrate, and a sensing portion and a signal processing circuit formed above the substrate with a resin film being disposed between the sensing portion and the signal processing circuit,
    Type: Application
    Filed: November 5, 2002
    Publication date: October 23, 2003
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Yuji Kawano, Naoki Yasuda, Motohisa Taguchi, Ikuya Kawakita, Shinichi Hosomi, Tatsuya Fukami
  • Patent number: 6576695
    Abstract: A thermoplastic resin composition having an excellent thermal aging resistance, particularly when used in moldings is provided which contains (1) a thermoplastic resin and (2) at least one of a polyglycerin derivative in which at least one hydroxyl group is esterified with a fatty acid, an N-acyl basic amino acid and a dibasic acid erythritol ester, and wherein i) if the polyglycerin derivative is used, the composition contains an antioxidant, or an antioxidant and a filler; ii) if the N-acyl basic amino acid is used, the composition contains a filler; and the thermoplastic resin contains at least one of a polyolefin resin, a polystyrene resin, a polyester resin, a polyamide resin and an engineering plastic; and iii) if the dibasic acid erythritol ester is used, the composition contains a filler, and the thermoplastic resin contains at least one of a polyolefin resin, a polystyrene resin, a polyester resin, a polyamide resin or an engineering plastic; and the amount of the dibasic acid erythritol ester is
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: June 10, 2003
    Assignee: Ajinomoto Co., Inc.
    Inventors: Hiroyuki Tanaka, Naoki Yasuda, Katsuhiro Otsuka, Ryohei Watanabe
  • Publication number: 20030100175
    Abstract: A low dielectric constant material having an excellent water resistance obtained by heat-treating a borazine compound of the formula (1-2): 1
    Type: Application
    Filed: October 9, 2002
    Publication date: May 29, 2003
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hideharu Nobutoki, Teruhiko Kumada, Toshiyuki Toyoshima, Naoki Yasuda, Suguru Nagae
  • Publication number: 20030069336
    Abstract: The present invention provides a composition for wood-polymer composites containing a thermoplastic resin, wood flour and a polyol ester compound having not less than one hydroxyl group esterified with fatty acid, and a wood-polymer composite made from this composition. According to the present invention, a wood-polymer composite having well-balanced mechanical strength and processability, as compared to products made from lumber alone and products made from thermoplastic resin alone, and a composition for wood-polymer composites therefor can be provided.
    Type: Application
    Filed: July 11, 2002
    Publication date: April 10, 2003
    Applicant: AJINOMOTO CO., INC.
    Inventors: Naoki Yasuda, Haruo Nemoto
  • Patent number: 6500889
    Abstract: Herein is disclosed a flame-retarded thermoplastic resin composition which comprises an original flame-retarded thermoplastic resin composition comprising certain amounts of a thermoplastic resin and of a brominated flame-retardant, and, in combination therewith, a certain amount of a dolomite compound, or in addition thereto, a certain amount of at least one compound selected from a hydrotalcite, a zinc-substituted hydrotalcite compound, or a zeolite compound, which flame-retarded thermoplastic resin composition of the present invention are remarkably improved in heat stabilizing effects as compared with the original flame-retarded thermoplastic resin composition.
    Type: Grant
    Filed: February 22, 2001
    Date of Patent: December 31, 2002
    Assignee: Ajinomoto Co., Inc.
    Inventors: Naoki Yasuda, Kyuji Ihara, Takeo Tanaka, Masaharu Akitsu
  • Patent number: 6399733
    Abstract: A process for preparing a highly pure silicone ladder polymer of the general formula (1): wherein R1 and R2 represent F, H, a lower alkyl group, an alkenyl group, an aryl group, a lower fluorinated alkyl group, a fluorinated alkenyl group or a fluorinated aryl group; R3, R4, R5 and R6 each represents H, a lower alkyl group or a lower fluorinated alkyl group; and n represents an integer of 5 to 10000, which comprises: (a) a step of obtaining a prepolymer in which at least one organosilane compound is dissolved in an organic solvent and hydrolyzed with ultrapure water; (b) a step of washing the obtained prepolymer with ultrapure water; and, (c) a step of dissolving the washed prepolymer in an organic solvent and heating without a catalyst.
    Type: Grant
    Filed: October 11, 2000
    Date of Patent: June 4, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Shigeyuki Yamamoto, Naoki Yasuda, Motohisa Taguchi
  • Publication number: 20020049266
    Abstract: There is disclosed a woody thermoplastic resin composition which prevents the occurrence of rust on the metal surface in a molding machine and suppresses the generation of a volatile substance as encountered when a woody thermoplastic resin composed of a thermoplastic resin and wood flour was subjected to heat molding and processing.
    Type: Application
    Filed: August 22, 2001
    Publication date: April 25, 2002
    Applicant: AJINOMOTO CO., INC.
    Inventors: Naoki Yasuda, Yoshihito Anzai, Hirokazu Ohno, Shigeto Yoshimura, Michihiro Kubo
  • Publication number: 20010044488
    Abstract: Herein is disclosed a flame-retarded thermoplastic resin composition which comprises an original flame-retarded thermoplastic resin composition comprising certain amounts of a thermoplastic resin and of a brominated flame-retardant, and, in combination therewith, a certain amount of a dolomite compound, or in addition thereto, a certain amount of at least one compound selected from a hydrotalcite, a zinc-substituted hydrotalcite compound, or a zeolite compound, which flame-retarded thermoplastic resin composition of the present invention are remarkably improved in heat stabilizing effects as compared with the original flame-retarded thermoplastic resin composition.
    Type: Application
    Filed: February 22, 2001
    Publication date: November 22, 2001
    Applicant: AJINOMOTO CO. INC.
    Inventors: Naoki Yasuda, Kyuji Ihara, Takeo Tanaka, Masaharu Akitsu
  • Patent number: 6319853
    Abstract: There is described a method of producing a pure resist pattern having superior topography smaller than the limit of wavelength of exposure light. A first resist pattern containing material capable of producing an acid on exposure to light is coated with a second resist containing material which causes a crosslinking reaction in the presence of an acid. An acid is produced in the resist pattern by exposing the pattern to light, thus forming a crosslinked layer along the boundary surface between the first resist pattern and the second resist. As a result, a second resist pattern which is greater than the first resist pattern is formed. Minute pure resist patterns are produced through two-step processing: that is, by removing the second resist from the substrate through use of a liquid prepared by dissolving an organic solvent into water and by rinsing the substrate with water. The diameter of holes formed in the resist or the interval between isolated patterns can be reduced.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: November 20, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takeo Ishibashi, Toshiyuki Toyoshima, Keiichi Katayama, Naoki Yasuda
  • Patent number: 6320220
    Abstract: A new switching element and a circuit device and the like using the same element are provided, which comprises semiconductor in which a channel region is formed at an interface with an insulating film, first and second terminals S, D, which are located in corresponding manner to both ends of the channel region, and through which a tunnel current is let to flow into the channel region, and a third terminal G giving a high frequency vibration to a potential barrier of the channel region through the insulating film, wherein the tunnel current flowing into the channel region is increased as a value of an exponential function is increased with a predetermined threshold vibration frequency as a boundary value.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: November 20, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Watanabe, Naoki Yasuda, Akira Toriumi, Tomoharu Tanaka, Toru Tanzawa
  • Patent number: 6288155
    Abstract: A thermal stabilizer for halogen-containing resins, comprising a compound of the dolomite series and the zinc salt of an organic acid. The thermal stabilizer, when incorporated in a halogen-containing resin, provides an excellent thermal stabilizing effect for the resin.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: September 11, 2001
    Assignee: Ajinomoto Co., Inc.
    Inventors: Yasuyoshi Miyachi, Yasunori Atarashi, Takeo Tanaka, Naoki Yasuda
  • Patent number: 6180320
    Abstract: There is described a method of stably manufacturing a fine resist pattern narrower than the wavelength of exposing light from a stepper. Under the method, a resist pattern is formed on a semiconductor substrate through use of an acid catalyst chemically-amplified photoresist, and an organic film which includes an acid or which produces an acid on exposure to light is formed on the surface of the semiconductor substrate including the resist pattern. The organic film is then subjected to a heat treatment to thereby diffuse an acid. The surface layer of the resist pattern is made soluble in an alkaline developer, and the surface layer of the resist pattern is removed through use of the alkaline developer. As a result, a fine resist pattern is formed.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: January 30, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takayuki Saito, Takeo Ishibashi, Toshiyuki Toyoshima, Kanji Sugino, Naoki Yasuda, Tadashi Miyagi
  • Patent number: 6147148
    Abstract: A thermoplastic resin composition comprising a thermoplastic resin, a dibasic acid erythritol ester, a filler and optionally an antioxidant. The dibasic acid erythritol ester, having a degree of esterification of not more than 50%, is added in an amount less than 1 part by weight, per 100 parts by weight of the thermoplastic resin, to improve the thermal aging resistance of the resin.
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: November 14, 2000
    Assignee: Ajinomoto Co., Inc.
    Inventors: Hiroyuki Tanaka, Naoki Yasuda
  • Patent number: 6111288
    Abstract: A new switching element and a circuit device and the like using the same element are provided, which comprises semiconductor in which a channel region is formed at an interface with an insulating film, first and second terminals S, D, which are located in corresponding manner to both ends of the channel region, and through which a tunnel current is let to flow into the channel region, and a third terminal G giving a high frequency vibration to a potential barrier of the channel region through the insulating film, wherein the tunnel current flowing into the channel region is increased as a value of an exponential function is increased with a predetermined threshold vibration frequency as a boundary value.
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: August 29, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroshi Watanabe, Naoki Yasuda, Akira Toriumi, Tomoharu Tanaka, Toru Tanzawa
  • Patent number: 6060403
    Abstract: A method of manufacturing a semiconductor device comprises the step of applying a nitridation treatment to a semiconductor substrate in the presence of a network terminal element so as to form a nitride film containing the network terminal element on the semiconductor substrate.
    Type: Grant
    Filed: September 16, 1998
    Date of Patent: May 9, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Naoki Yasuda, Masahiro Koike, Kouichi Muraoka, Hideki Satake