Patents by Inventor Hiroki Tabuchi

Hiroki Tabuchi 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: 6103428
    Abstract: A photomask for use in manufacturing a semiconductor includes a chrome pattern serving as a mask pattern. The chrome pattern is formed so as to have a size substantially equivalent to a wavelength of an exposure light at an interval substantially equivalent to the wavelength. The chrome pattern includes a band-shaped first chrome pattern and a second chrome pattern having a side in the widthwise direction substantially orthogonal to the side in the lengthwise direction of the first chrome pattern. Then, auxiliary patterns of a size of not more than the wavelength of the exposure light, which have a function of reducing the exposure light or shifting the phase of the exposure light, are formed at both corners of the side of the second chrome pattern so as to partially overlap the second chrome pattern.
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: August 15, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tetsuya Hatai, Hiroki Tabuchi, Masashi Inoue
  • Patent number: 5480047
    Abstract: A method for forming a fine resist pattern by exposing comprising the steps of: (i) forming a resist layer on a semiconductor substrate; (ii) forming a phase shifting pattern in an upper portion of the resist layer, the phase-sifting pattern having a tapered edge corresponding to a portion to which formation of an objective fine resist pattern is not desired; (iii) exposing the entire surface of the semiconductor substrate including the phase-shifting pattern; and (iv) forming a fine resist pattern below an outline except for the tapered edge of the phase-shifting pattern.
    Type: Grant
    Filed: May 12, 1994
    Date of Patent: January 2, 1996
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Makoto Tanigawa, Hiroki Tabuchi, Takayuki Taniguchi
  • Patent number: 5403685
    Abstract: Sub-micron features are defined photo-lithographically by combining phase-shifting techniques with conventional photo lithographic techniques. In a first step, phase-shifting edges are defined in a photoresist layer. Dark-bands develop at the phase-shifting edges due to wavefront interference of an illuminating radiation in a subsequent exposure step. Development leaves behind sub-micron sections of photoresist which were covered by the dark-band regions. The dark-band sections are hardened and overcoated with a new layer of photoresist. A second pattern is projected onto the second layer of photoresist using conventional techniques. The second pattern is developed so as to create features having dimensions reduced by parts of the dark-band sections previously developed.
    Type: Grant
    Filed: September 29, 1992
    Date of Patent: April 4, 1995
    Assignees: Sharp Kabushiki Kaisha, Sharp Microelectronics Technology, Inc.
    Inventors: David A. Vidusek, Hiroki Tabuchi
  • Patent number: 5389474
    Abstract: A mask for photolithography having a transparent substrate which allows light having a predetermined wavelength to pass therethrough; an opaque pattern provided on said substrate for inhibiting the light from passing therethrough; and a stepped portion provided adjacent to said opaque pattern on said substrate and having an inclined area, said stepped portion being transparent for allowing the light to pass therethrough, which can be used in a photolithographic system in fabrication of semiconductor devices and the like.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: February 14, 1995
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Katsuji Iguchi, Takashi Fukushima, Hiroki Tabuchi
  • Patent number: 5353116
    Abstract: In the system according to the present invention detects defects by projecting illumination light for exposure having a certain wavelength perpendicularly onto a phase shift mask to be examined; picking up, by means of an image acquisition section, two pattern images which are formed from the irradiated light having passed through two neighboring dies on the phase shift mask and image-formed individually through respective magnifying projection optical systems, and superposing the image patterns of two dies through an alignment to compare therebetween.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: October 4, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Makoto Tanigawa, Hiroki Tabuchi, Hiroyuki Moriwaki, Takayuki Taniguchi
  • Patent number: 5330862
    Abstract: A method for forming a resist mask pattern by light exposure providing the steps of forming a resist layer on a semiconductor substrate, forming a phase shifter pattern for inverting a phase of exposed light in an upper portion of the resist layer itself or over the surface of the resist layer, exposing the surface of the semiconductor substrate including the phase shifter pattern, and forming a fine mask pattern below the edge of the phase shifter pattern.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: July 19, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroki Tabuchi, Katsuji Iguchi, Makoto Tanigawa, Takayuki Taniguchi, Hiroyuki Moriwaki
  • Patent number: 5048336
    Abstract: A moisture-sensitive device comprising a substrate such as silicon substrate, a pair of belt-like heating elements extending over recesses formed in the substrate, the heating elements being composed of a resistive film of platinum or nickel and a heat-resistant insulating film covering the resistive film in which one of the heating elements acts as a detector element and the other as a reference element, which device can exactly determine an absolute humidity irrespective of sudden changes of temperature.
    Type: Grant
    Filed: December 29, 1989
    Date of Patent: September 17, 1991
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Sugihara, Kazutaka Uda, Hiroki Tabuchi, Shuji Miyoshi, Yasuhiko Inami, Nobuo Hashizume, Hisatoshi Furubayashi
  • Patent number: 4928513
    Abstract: A sensor having a pair of sensor units, one of which is a detecting sensor unit and the other of which is a reference sensor unit, wherein each of the units comprises a substrate with a hollow portion, a thin insulating layer with a bridge, cantilever or diaphragm shape disposed on the substrate, a sensitive film disposed on the bridge, cantilever or diaphragm portion of the thin insulating layer, and a pair of electrodes being in contact with the sensitive film, the sensitive film section of the detecting sensor unit being exposed to an atmosphere to be measured so that the electrical resistance of the sensitive film changes with a variation in the physical quantity of the atmosphere to be detected, and the sensitive film section of the reference sensor unit being sealed within a shielding container so that the electrical resistance of the sensitive film is not influenced by a variation in the physical quantity of the atmosphere outside of the container, whereby the absolute physical quantity of the atmosphe
    Type: Grant
    Filed: July 28, 1987
    Date of Patent: May 29, 1990
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Sugihara, Kazutaka Uda, Hiroki Tabuchi, Yasuhiko Inami, Masaya Hijikigawa, Shoei Kataoka
  • Patent number: 4805296
    Abstract: A method of manufacturing a resistance thermometer which includes the steps of preparing a support substrate and forming a platinum film, which serves as a temperature measuring element, on the support substrate by a sputtering process employing a sputtering gas which contains a predetermined amount of oxygen gas, and a resistance thermometer produced by the method. The method which optionally includes forming an aluminum oxide film, the substrate and the platinum film.
    Type: Grant
    Filed: September 10, 1986
    Date of Patent: February 21, 1989
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Akihito Jinda, Hisatoshi Furubayashi, Masaya Hijikigawa, Hiroki Tabuchi
  • Patent number: 4649365
    Abstract: A platinum resistor for the measurement of temperatures having a silicon substrate, an aluminum oxide film formed on said silicon substrate, and a platinum film formed on said aluminum oxide film.
    Type: Grant
    Filed: February 4, 1986
    Date of Patent: March 10, 1987
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hisatoshi Furubayashi, Hiroki Tabuchi, Masaya Hijikigawa
  • Patent number: D1026088
    Type: Grant
    Filed: July 27, 2023
    Date of Patent: May 7, 2024
    Assignee: BROTHER INDUSTRIES, LTD.
    Inventors: Kazuki Nakano, Robin Riazi, Hiroki Tabuchi, Masahide Asano