Patents by Inventor Taichi Koizumi

Taichi Koizumi 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: 20230345982
    Abstract: The present invention relates to a seasoning from malted rice used as a raw material containing 0.3 ppm or more of maltol and/or 0.25 ppm or more of methional, and 10% (w/v) or more of glucose.
    Type: Application
    Filed: August 18, 2021
    Publication date: November 2, 2023
    Inventors: Yusuke Ito, Taichi Koizumi, Takeharu Nakahara, Izumi Kobayashi
  • Patent number: 6977133
    Abstract: A photomask is used for transferring a mask pattern onto a semiconductor substrate. The mask pattern includes a junction at which two line patterns are connected to each other with one line pattern being orthogonal to the other line pattern so as to form a T-shape, or a proximity portion at which two line patterns are located close to each other with one line pattern being substantially orthogonal to the other line pattern so as to form a T-shape. A small pattern is formed on a side edge of the line pattern in the vicinity of the junction or the proximity portion so as to form a wide portion of the line pattern. The small pattern is provided within the range between 0.79 and 1.8 ?/(NA·K) of a distance from the neighboring side edge of the other line pattern, where ? is the wavelength of exposure illumination light, NA is the numerical aperture of a lens used, and K is a transfer reduction ratio.
    Type: Grant
    Filed: March 17, 2003
    Date of Patent: December 20, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd
    Inventors: Taichi Koizumi, Akio Misaka
  • Publication number: 20030199124
    Abstract: A photomask is used for transferring a mask pattern onto a semiconductor substrate. The mask pattern includes a junction at which two line patterns are connected to each other with one line pattern being orthogonal to the other line pattern so as to form a T-shape, or a proximity portion at which two line patterns are located close to each other with one line pattern being substantially orthogonal to the other line pattern so as to form a T-shape. A small pattern is formed on a side edge of the line pattern in the vicinity of the junction or the proximity portion so as to form a wide portion of the line pattern. The small pattern is provided within the range between 0.79 and 1.8 &lgr;/(NA·K) of a distance from the neighboring side edge of the other line pattern, where &lgr; is the wavelength of exposure illumination light, NA is the numerical aperture of a lens used, and K is a transfer reduction ratio.
    Type: Application
    Filed: March 17, 2003
    Publication date: October 23, 2003
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Taichi Koizumi, Akio Misaka
  • Patent number: 5773174
    Abstract: A first correlation is obtained which is a correlation between latent image height produced after exposure on a resist layer, and resist pattern linewidth for a given length of develop time. Additionally, a second correlation is obtained which is a correlation between develop time for each exposure energy dose and resist pattern linewidth. The height of a latent image produced on an actually exposed resist layer is determined. From the first correlation, an estimated resist pattern linewidth, which is a resist pattern linewidth corresponding to a latent image height and to a given length of develop time, is found. From the second correlation, an estimated exposure energy dose, which is an exposure energy dose corresponding to a given length of develop time and to an estimated resist patten linewidth, is found.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: June 30, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Taichi Koizumi, Takahiro Matsuo, Masayuki Endo
  • Patent number: 5763124
    Abstract: A first correlation is obtained which is a correlation between latent image height produced after exposure on a resist layer, and resist pattern linewidth for a given length of develop time. Additionally, a second correlation is obtained which is a correlation between develop time for each exposure energy dose and resist pattern linewidth. The height of a latent image produced on an actually exposed resist layer is determined. From the first correlation, an estimated resist pattern linewidth, which is a resist pattern linewidth corresponding to a latent image height and to a given length of develop time, is found. From the second correlation, an estimated exposure energy dose, which is an exposure energy dose corresponding to a given length of develop time and to an estimated resist pattern linewidth, is found.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: June 9, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Taichi Koizumi, Takahiro Matsuo
  • Patent number: 5756242
    Abstract: A first correlation is obtained which is a correlation between latent image height produced after exposure on a resist layer, and resist pattern linewidth for a given length of develop time. Additionally, a second correlation is obtained which is a correlation between develop time for each exposure energy dose and resist pattern linewidth. The height of a latent image produced on an actually exposed resist layer is determined. From the first correlation, an estimated resist pattern linewidth, which is a resist pattern linewidth corresponding to a latent image height and to a given length of develop time, is found. From the second correlation, an estimated exposure energy dose, which is an exposure energy dose corresponding to a given length of develop time and to an estimated resist patten linewidth, is found.
    Type: Grant
    Filed: November 13, 1995
    Date of Patent: May 26, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Taichi Koizumi, Takahiro Matsuo, Masayuki Endo
  • Patent number: 5306601
    Abstract: Herein is provided a fine pattern forming method which is prevented from the charging-up phenomenon at the time of electric charged beam writing owing to the use of a polyalkylthiophene type conductive polymeric substance or a quaternary ammonium ion type polymeric substance in a monolayer or multilayer resist.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: April 26, 1994
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuhiko Hashimoto, Taichi Koizumi, Kenji Kawakita, Noboru Nomura
  • Patent number: 5275921
    Abstract: In a pattern forming process using a chemical amplification type resist, a good pattern with high contrast between exposed portions and non-exposed portions due to photobleach of a dye and a large process latitude can be obtained by adding a dye such as Sudan Orange, or a dye having a reducing absorption by exposure to light such as naphthoquinonediazide sulfonic acid ester to a chemical amplification type resist for ultraviolet rays, particularly i-line of 365 nm or ultraviolet rays of 365 nm or less.
    Type: Grant
    Filed: March 21, 1991
    Date of Patent: January 4, 1994
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Taichi Koizumi, Yoshiyuki Tani, Masaru Sasago
  • Patent number: 5169494
    Abstract: The present invention provides a method of forming a fine pattern comprising the steps of forming on a semiconductor substrate an organic polymer film and heat treating it, forming on the organic polymer film an inorganic film and heat treating it, forming on the inorganic film an electron beam resist film and heat treating it, drawing a pattern on the resist film, developing it to form a resist pattern, and etching the inorganic film and the organic polymer film using the resist pattern as a mask, wherein the improvement comprises using one substance selected from the group consisting of a polyphenylene sulfide, a derivative thereof, and a polymer represented by the formula (I): ##STR1## where n is a positive integer, for forming at least one of the organic polymer film and the electron beam resist film.
    Type: Grant
    Filed: August 8, 1991
    Date of Patent: December 8, 1992
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuhiko Hashimoto, Taichi Koizumi, Kenji Kawakita, Noboru Nomura
  • Patent number: 5057689
    Abstract: A scanning electron microscope is disclosed in which an objective lens includes a first pole piece and a second pole piece. The first pole piece is provided with a hole through which an electron beam passes, and is disposed between an electron gun for emitting the electron beam and the second pole piece. The second pole piece has a planar portion on which a specimen is placed, and the second pole piece being mounted on a supporting block movable in a plane substantially perpendicular to the projecting direction of the electron beam.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: October 15, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Noboru Nomura, Hideo Nakagawa, Taichi Koizumi, Kenji Harafuji, Mitsuhiro Okuni, Norimichi Anazawa
  • Patent number: 5030549
    Abstract: Provided is a method for forming fine pattern free from shear of pattern caused by charging and high in dry etch resistance by using a high molecular organic film containing an organometallic complex or a metallic salt in single-layer or multi-layer resist process and treating the surface of this film with a reducing agent to form a metallic layer on the surface.
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: July 9, 1991
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuhiko Hashimoto, Taichi Koizumi, Kenji Kawakita, Noboru Nomura
  • Patent number: 4976818
    Abstract: A fine pattern forming method capable of forming an accurate fine pattern without charge-up at the time of electron beam or focus ion beam exposure, by treating the bottom layer or intermediate layer or silicon containing resist of a multi-layer resist with ion shower irradiation or reducing solvent.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: December 11, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuhiko Hashimoto, Taichi Koizumi, Kenji Kawakita, Noboru Nomura
  • Patent number: 4936951
    Abstract: A fine pattern forming method capable of forming an accurate fine pattern without charge-up at the time of electron beam or focus ion beam exposure is provided by treating the bottom layer or intermediate layer or silicon containing resist of a multi-layer resist with ion shower irradiation or reducing solvent.
    Type: Grant
    Filed: October 26, 1988
    Date of Patent: June 26, 1990
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuhiko Hashimoto, Taichi Koizumi, Kenji Kawakita, Noboru Nomura