Patents by Inventor Hiroshi Shiraishi

Hiroshi Shiraishi 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: 20060105273
    Abstract: There is a problem in that when the demand accuracy with respect to a semiconductor pattern dimension comes close to a resist molecule size with miniaturization, the device performance is deteriorated due to edge roughness of a resist pattern to exert a bad influence on the system performance. The present invention overcomes the problem by the procedure in which super-molecules which are small in dimension as compared with the conventional polymers are used as main components, the reaction number required for the change of molecule solubility is made constant and as large as possible, and an acid generator is made clathrate or combinatory n super molecules to make an acid catalyst concentration large. As a result, it is possible to form a pattern of molecular accuracy with high productivity even with respect to the pattern dimension less than 50 nm, thereby realizing the high performance system.
    Type: Application
    Filed: July 30, 2002
    Publication date: May 18, 2006
    Applicant: Hitachi, Ltd.
    Inventors: Hiroshi Fukuda, Yoshiyuki Yokoyama, Takashi Hattori, Toshio Sakamizu, Tadashi Arai, Hiroshi Shiraishi
  • Patent number: 7005216
    Abstract: Providing a photo mask for KrF excimer laser lithography, which can be produced with high accuracy and low defects in a smaller number of steps. A photo mask for KrF excimer laser lithography according to the present invention is one in which a resist pattern 18 efficiently absorbing a KrF excimer laser light (wavelength: about 248 nm) is formed directly on a quartz substrate 10. The resist pattern 18 comprises: an aqueous alkali-soluble resin having a high light shielding property, which incorporates a naphthol structure having at least one hydroxyl group bound to a naphthalene nucleus; or a radiation sensitive resist having, as a main component, an aqueous alkali-soluble resin containing a derivative of the above-mentioned aqueous alkali-soluble resin as a resin matrix.
    Type: Grant
    Filed: November 20, 2002
    Date of Patent: February 28, 2006
    Assignee: Renesas Technology Corp.
    Inventors: Hiroshi Shiraishi, Sonoko Migitaka, Takashi Hattori, Tadashi Arai, Toshio Sakamizu
  • Patent number: 6927002
    Abstract: To develop a small quantity of various kinds of semiconductor devices in a short time and to realize a photomask suitable to be manufactured at a low cost. A shade pattern of a photomask is constituted by containing nanoparticles such as carbon in an organic film such as a photoresist film. A pattern is transferred to a photoresist on a semiconductor wafer by means of the reduction projection exposure using the photomask. At the time of the above exposure, it is possible to select exposure light within a range of wide wavelengths including i-line, KrF excimer laser beam, ArF excimer laser beam, or the like.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: August 9, 2005
    Assignee: Renesas Technology Corp.
    Inventors: Takashi Hattori, Yasuko Gotoh, Hidetoshi Satoh, Toshihiko Tanaka, Hiroshi Shiraishi
  • Patent number: 6855483
    Abstract: A negative pattern is formed to be transparent in the far ultraviolet region including the wavelength 193 nm of an ArF excimer laser and, despite its chemical structure having high dry etching, does not swell and has excellent resolution. An acid-catalyzed reaction is utilized wherein a ?-hydroxy or ?-hydroxy carboxylic acid structure is partially or entirely converted to a ?-lactone or ?-lactone structure. The negative pattern is developed with an aqueous alkali solution without swelling.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: February 15, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Hattori, Yuko Tsuchiya, Hiroshi Shiraishi
  • Publication number: 20050008976
    Abstract: To form a fine resist pattern without collapse, the invention patterns a resist by applying a resist composition to a substrate to form a resist film, exposing the resist film to radiation in a desired pattern, and developing the exposed resist film using supercritical carbon dioxide at 200 atm or lower. The resist composition mainly includes a polymer having a solubility parameter equal to or lower than that of supercritical carbon dioxide.
    Type: Application
    Filed: June 18, 2004
    Publication date: January 13, 2005
    Inventors: Toshio Sakamizu, Hiroshi Fukuda, Hiroshi Shiraishi
  • Patent number: 6750000
    Abstract: A method of manufacturing an electron device provided with minute structure such as a semiconductor integrated circuit using projection exposure technique and phase shift mask technique, maintaining a high yield is disclosed. In an electron device manufacturing method according to the invention, a desired electron device is manufactured by printing a light shielding film pattern on a photosensitive film provided on the surface of a workpiece by a projection tool using a mask where a phase shifter having predetermined thickness is partially formed on the flat surface of a transparent plate and a light shielding film having a predetermined pattern and made of non-metal is partially provided with the film covering the end of the shifter and developing the photosensitive film.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: June 15, 2004
    Assignee: Renesas Technology Corp.
    Inventors: Toshihiko Tanaka, Norio Hasegawa, Hiroshi Shiraishi, Hidetoshi Satoh
  • Patent number: 6703171
    Abstract: To develop a small quantity of various kinds of semiconductor devices in a short time and to realize a photomask suitable to be manufactured at a low cost. A shade pattern of a photomask is constituted by containing nanoparticles such as carbon in an organic film such as a photoresist film. A pattern is transferred to a photoresist on a semiconductor wafer by means of the reduction projection exposure using the photomask. At the time of the above exposure, it is possible to select exposure light within a range of wide wavelengths including i-line, KrF excimer laser beam, ArF excimer laser beam, or the like.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: March 9, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Hattori, Yasuko Gotoh, Hidetoshi Satoh, Toshihiko Tanaka, Hiroshi Shiraishi
  • Publication number: 20040043307
    Abstract: A method of manufacturing an electron device provided with minute structure such as a semiconductor integrated circuit using projection exposure technique and phase shift mask technique, maintaining a high yield is disclosed. In an electron device manufacturing method according to the invention, a desired electron device is manufactured by printing a light shielding film pattern on a photosensitive film provided on the surface of a workpiece by a projection tool using a mask where a phase shifter having predetermined thickness is partially formed on the flat surface of a transparent plate and a light shielding film having a predetermined pattern and made of nonmetal is partially provided with the film covering the end of the shifter and developing the photosensitive film.
    Type: Application
    Filed: September 29, 2003
    Publication date: March 4, 2004
    Applicant: Hitachi, Limited
    Inventors: Toshihiko Tanaka, Norio Hasegawa, Hiroshi Shiraishi, Hidetoshi Satoh
  • Patent number: 6653052
    Abstract: A method of manufacturing an electron device provided with minute structure such as a semiconductor integrated circuit using projection exposure technique and phase shift mask technique, maintaining a high yield is disclosed. In an electron device manufacturing method according to the invention, a desired electron device is manufactured by printing a light shielding film pattern on a photosensitive film provided on the surface of a workpiece by a projection tool using a mask where a phase shifter having predetermined thickness is partially formed on the flat surface of a transparent plate and a light shielding film having a predetermined pattern and made of non-metal is partially provided with the film covering the end of the shifter and developing the photosensitive film.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: November 25, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Toshihiko Tanaka, Norio Hasegawa, Hiroshi Shiraishi, Hidetoshi Satoh
  • Publication number: 20030129505
    Abstract: Providing a photo mask for KrF excimer laser lithography, which can be produced with high accuracy and low defects in a smaller number of steps. A photo mask for KrF excimer laser lithography according to the present invention is one in which a resist pattern 18 efficiently absorbing a KrF excimer laser light (wavelength: about 248 nm) is formed directly on a quartz substrate 10. The resist pattern 18 comprises: an aqueous alkali-soluble resin having a high light shielding property, which incorporates a naphthol structure having at least one hydroxyl group bound to a naphthalene nucleus; or a radiation sensitive resist having, as a main component, an aqueous alkali-soluble resin containing a derivative of the above-mentioned aqueous alkali-soluble resin as a resin matrix.
    Type: Application
    Filed: November 20, 2002
    Publication date: July 10, 2003
    Inventors: Hiroshi Shiraishi, Sonoko Migitaka, Takashi Hattori, Tadashi Arai, Toshio Sakamizu
  • Publication number: 20030099905
    Abstract: A negative pattern is formed to be transparent in the far ultraviolet region including the wavelength 193 nm of an ArF excimer laser and, despite its chemical structure having high dry etching, does not swell and has excellent resolution. An acid-catalyzed reaction is utilized wherein a &ggr;-hydroxy or &dgr;-hydroxy carboxylic acid structure is partially or entirely converted to a &ggr;-lactone or &dgr;-lactone structure. The negative pattern is developed with an aqueous alkali solution without swelling.
    Type: Application
    Filed: October 4, 2002
    Publication date: May 29, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Takashi Hattori, Yuko Tsuchiya, Hiroshi Shiraishi
  • Patent number: 6515185
    Abstract: Cyclododecanone and cyclododecanol are produced each in high yield by reacting a epoxycyclododecane compound with hydrogen in the presence of a solid catalyst containing (a) catalytic component including a platinum group metal, (b) a promoter component including a VIII group, IIb group, IIIb group, IVb group, Vb group VIb group or VIIb group element or lanthanoid element or compound of the element, and (c) a carrier supporting the components (a) and (b) thereon.
    Type: Grant
    Filed: October 3, 2000
    Date of Patent: February 4, 2003
    Assignee: Ube Industries, Ltd.
    Inventors: Nobuyuki Kuroda, Hiroshi Shiraishi, Takato Nakamura
  • Patent number: 6489082
    Abstract: A negative pattern is formed to be transparent in the far ultraviolet region including the wavelength 193 nm of an ArF excimer laser and, despite its chemical structure having high dry etching, does not swell and has excellent resolution. An acid-catalyzed reaction is utilized wherein a &ggr;-hydroxy or &dgr;-hydroxy carboxylic acid structure is partially or entirely converted to a &ggr;-lactone or &dgr;-lactone structure. The negative pattern is developed with an aqueous alkali solution without swelling.
    Type: Grant
    Filed: August 29, 2000
    Date of Patent: December 3, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Hattori, Yuko Tsuchiya, Hiroshi Shiraishi
  • Publication number: 20020094483
    Abstract: To develop a small quantity of various kinds of semiconductor devices in a short time and to realize a photomask suitable to be manufactured at a low cost. A shade pattern of a photomask is constituted by containing nanoparticles such as carbon in an organic film such as a photoresist film. A pattern is transferred to a photoresist on a semiconductor wafer by means of the reduction projection exposure using the photomask. At the time of the above exposure, it is possible to select exposure light within a range of wide wavelengths including i-line, KrF excimer laser beam, ArF excimer laser beam, or the like.
    Type: Application
    Filed: February 12, 2002
    Publication date: July 18, 2002
    Applicant: Hitachi, Ltd.
    Inventors: Takashi Hattori, Yasuko Gotoh, Hidetoshi Satoh, Toshihiko Tanaka, Hiroshi Shiraishi
  • Publication number: 20020086223
    Abstract: To develop a small quantity of various kinds of semiconductor devices in a short time and to realize a photomask suitable to be manufactured at a low cost. A shade pattern of a photomask is constituted by containing nanoparticles such as carbon in an organic film such as a photoresist film. A pattern is transferred to a photoresist on a semiconductor wafer by means of the reduction projection exposure using the photomask. At the time of the above exposure, it is possible to select exposure light within a range of wide wavelengths including i-line, KrF excimer laser beam, ArF excimer laser beam, or the like.
    Type: Application
    Filed: December 27, 2001
    Publication date: July 4, 2002
    Inventors: Takashi Hattori, Yasuko Gotoh, Hidetoshi Satoh, Toshihiko Tanaka, Hiroshi Shiraishi
  • Patent number: 6335472
    Abstract: Epoxidized C6-C12 cyclohydrocarbon compounds, for example, epoxidized C6-C12 cycloalkanes, cycloalkenes and/or cycloalkadienes are converted to cycloalkanols, cycloalkanones and cycloalkanes by hydrogenating the epoxidized C6-C12 cyclohydrocarbon compounds with hydrogen under a pressure of 0.1 to 5.4 MPa at a temperature of 100 to 280° C. in the presence of a catalyst containing at least one platinum group metal, for example, Pd or Ru.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: January 1, 2002
    Assignee: UBE Industries, Ltd.
    Inventors: Tokuo Matsuzaki, Yasuo Nakamura, Takumi Manabe, Takato Nakamura, Nobuyuki Kuroda, Hiroshi Shiraishi
  • Patent number: 6319649
    Abstract: A chemically amplified photosensitive resin composition containing a first compound forming an acid by irradiation of actinic ray and a second compound that changes the solubility to an aqueous alkali solution with acid-catalyzed reaction wherein an ion dissociative compound having the composition represented by the general formula (1) or (2), as well a method of forming a resist pattern using the composition are disclosed, the formulae being expressed by: where each of R2, R3 and R4 represents hydrogen, and an alkyl or aryl group of 1 to 7 carbon atoms, at least one of R1, R2, R3 and R4 represents hydrogen, Y1 represents chlorine, bromine, iodine, carbonate group of 1 to 7 carbon atoms or sulfonate group of 1 to 7 carbon atoms, and
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: November 20, 2001
    Assignees: Hitachi, Ltd., Hitachi Chemical Co., Ltd.
    Inventors: Koji Kato, Masahiro Hashimoto, Michiaki Hashimoto, Toshio Sakamizu, Hiroshi Shiraishi
  • Publication number: 20010033995
    Abstract: A method of manufacturing an electron device provided with minute structure such as a semiconductor integrated circuit using projection exposure technique and phase shift mask technique, maintaining a high yield is disclosed. In an electron device manufacturing method according to the invention, a desired electron device is manufactured by printing a light shielding film pattern on a photosensitive film provided on the surface of a workpiece by a projection tool using a mask where a phase shifter having predetermined thickness is partially formed on the flat surface of a transparent plate and a light shielding film having a predetermined pattern and made of non-metal is partially provided with the film covering the end of the shifter and developing the photosensitive film.
    Type: Application
    Filed: March 19, 2001
    Publication date: October 25, 2001
    Inventors: Toshihiko Tanaka, Norio Hasegawa, Hiroshi Shiraishi, Hidetoshi Satoh
  • Patent number: 6156486
    Abstract: A negative pattern is formed to be transparent in the far ultraviolet region including the wavelength 193 nm of an ArF excimer laser and, despite its chemical structure having high dry etching, does not swell and has excellent resolution. An acid-catalyzed reaction is utilized wherein a .gamma.-hydroxy or .delta.-hydroxy carboxylic acid structure is partially or entirely converted to a .gamma.-lactone or .delta.-lactone structure. The negative pattern is developed with an aqueous alkali solution without swelling.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: December 5, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Hattori, Yuko Tsuchiya, Hiroshi Shiraishi
  • Patent number: 6017680
    Abstract: A negative pattern is formed to be transparent in the far ultraviolet region including the wavelength 193 nm of an ArF excimer laser and, despite its chemical structure having high dry etching, does not swell and has excellent resolution. An acid-catalyzed reaction is utilized wherein a .gamma.-hydroxy or .delta.-hydroxy carboxylic acid structure is partially or entirely converted to a .gamma.-lactone or .delta.-lactone structure. The negative pattern is developed with an aqueous alkali solution without swelling.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: January 25, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Takashi Hattori, Yuko Tsuchiya, Hiroshi Shiraishi