Patents by Inventor Susumu Tsujikawa

Susumu Tsujikawa 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: 8124000
    Abstract: A method for removing and modifying a protrusion by using a short pulse laser is provided for modifying a color filter. In a color filter modifying method, a transparent substrate (2) is scanned with a beam in a parallel direction, while irradiating a protrusion (8) generated on the color filters (3-1, 3-2, 3-3) formed on a transparent substrate (2) with a beam collected by a high NA condensing lens (18), and a protrusion (8) is removed or modified.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: February 28, 2012
    Assignee: Cyber Laser Inc.
    Inventors: Susumu Tsujikawa, Yoshio Otani, Tetsumi Sumiyoshi
  • Patent number: 8044439
    Abstract: A light-emitting device (1) is provided having a current blocking layer (9) of buried structure, a portion of the current blocking layer (9) having an oxygen concentration higher than that of a light-emitting layer, the current blocking layer being of a thickness of not less than 5 nm and not more than 100 nm. It includes an etching stop layer (24) below the current blocking layer (9), the etching stop layer being good in oxidation resistance. The light-emitting device (1) and its manufacturing method are provided such that the device has its current confinement effect improved and its output increased at lower forward voltage.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: October 25, 2011
    Assignee: Dowa Electronics Materials Co., Ltd.
    Inventors: Ryo Sakamoto, Masatoshi Iwata, Susumu Tsujikawa, Yoshiyuki Kobayashi
  • Publication number: 20100219542
    Abstract: A method for removing and modifying a protrusion by using a short pulse laser is provided for modifying a color filter. In a color filter modifying method, a transparent substrate (2) is scanned with a beam in a parallel direction, while irradiating a protrusion (8) generated on the color filters (3-1, 3-2, 3-3) formed on a transparent substrate (2) with a beam collected by a high NA condensing lens (18), and a protrusion (8) is removed or modified.
    Type: Application
    Filed: July 27, 2006
    Publication date: September 2, 2010
    Applicant: Cyber Laser Inc.
    Inventors: Susumu Tsujikawa, Yoshio Otani, Tetsumi Sumiyoshi
  • Patent number: 7692864
    Abstract: A crystallization method includes wavefront-dividing an incident light beam into a plurality of light beams, condensing the wavefront-divided light beams in a corresponding phase shift portion of a phase shift mask or in the vicinity of the phase shift portion to form a light beam having an light intensity distribution of an inverse peak pattern in which a light intensity is minimum in a point corresponding to the phase shift portion of the phase shift mask, and irradiating a polycrystalline semiconductor film or an amorphous semiconductor film with the light beam having the light intensity distribution to produce a crystallized semiconductor film.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: April 6, 2010
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Publication number: 20100009550
    Abstract: [PROBLEMS] To provide a method and an apparatus for cutting a conductive link of a redundant circuit in a semiconductor circuit. [MEANS FOR SOLVING PROBLEMS] A method is provided for selectively cutting a plurality of conductive links embedded in a protection layer which covers at least the conductive links in a semiconductor device formed on a semiconductor substrate. A focused beam is aligned with a target link, a first pulsed laser beam having a short laser wavelength of 400 nm or shorter and a second pulsed laser beam having a wavelength longer than 400 nm are generated, the first and the second pulsed laser beams are overlapped and applied onto the conductive link from over the protection layer. Preferably, the second pulsed laser is applied after the first pulsed layer in terms of time.
    Type: Application
    Filed: December 7, 2007
    Publication date: January 14, 2010
    Applicants: CYBER LASER, INC., MEERE COMPANY, INC.
    Inventors: Susumu Tsujikawa, Masanao Kamata, Tetsumi Sumiyoshi
  • Publication number: 20090278163
    Abstract: A light-emitting device (1) is provided having a current blocking layer (9) of buried structure, a portion of the current blocking layer (9) having an oxygen concentration higher than that of a light-emitting layer, the current blocking layer being of a thickness of not less than 5 nm and not more than 100 nm. It includes an etching stop layer (24) below the current blocking layer (9), the etching stop layer being good in oxidation resistance. The light-emitting device (1) and its manufacturing method are provided such that the device has its current confinement effect improved and its output increased at lower forward voltage.
    Type: Application
    Filed: September 28, 2006
    Publication date: November 12, 2009
    Inventors: Ryo Sakamoto, Masatoshi Iwata, Susumu Tsujikawa, Yoshiyuki Kobayashi
  • Patent number: 7572335
    Abstract: A crystallization apparatus includes an illumination system which illuminates a phase-shift mask and an image-forming optical system arranged in an optical path between the phase-shift mask and a semiconductor film. The semiconductor film is irradiated with a light beam having a light intensity distribution of inverted peak patterns whose light intensity is the lowest in portions corresponding to phase shift sections to form a crystallized semiconductor film. The image-forming optical system is located to optically conjugate the phase-shift mask and the semiconductor film and has an aberration corresponding to the given wavelength range to form a light intensity distribution of inverted peak patterns with no swell of intensity in the middle portion.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: August 11, 2009
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Publication number: 20090181483
    Abstract: A crystallization method includes wavefront-dividing an incident light beam into a plurality of light beams, condensing the wavefront-divided light beams in a corresponding phase shift portion of a phase shift mask or in the vicinity of the phase shift portion to form a light beam having an light intensity distribution of an inverse peak pattern in which a light intensity is minimum in a point corresponding to the phase shift portion of the phase shift mask, and irradiating a polycrystalline semiconductor film or an amorphous semiconductor film with the light beam having the light intensity distribution to produce a crystallized semiconductor film.
    Type: Application
    Filed: March 13, 2009
    Publication date: July 16, 2009
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Publication number: 20090180190
    Abstract: A crystallization method includes wavefront-dividing an incident light beam into a plurality of light beams, condensing the wavefront-divided light beams in a corresponding phase shift portion of a phase shift mask or in the vicinity of the phase shift portion to form a light beam having an light intensity distribution of an inverse peak pattern in which a light intensity is minimum in a point corresponding to the phase shift portion of the phase shift mask, and irradiating a polycrystalline semiconductor film or an amorphous semiconductor film with the light beam having the light intensity distribution to produce a crystallized semiconductor film.
    Type: Application
    Filed: March 13, 2009
    Publication date: July 16, 2009
    Inventors: Yukio TANIGUCHI, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Patent number: 7537660
    Abstract: A crystallization method includes wavefront-dividing an incident light beam into a plurality of light beams, condensing the wavefront-divided light beams in a corresponding phase shift portion of a phase shift mask or in the vicinity of the phase shift portion to form a light beam having an light intensity distribution of an inverse peak pattern in which a light intensity is minimum in a point corresponding to the phase shift portion of the phase shift mask, and irradiating a polycrystalline semiconductor film or an amorphous semiconductor film with the light beam having the light intensity distribution to produce a crystallized semiconductor film.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: May 26, 2009
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Patent number: 7505204
    Abstract: A crystallization apparatus includes an illumination system which applies illumination light for crystallization to a non-single-crystal semiconductor film, and a phase shifter which includes first and second regions disposed to form a straight boundary and transmitting the illumination light from the illumination system by a first phase retardation therebetween, and phase-modulates the illumination light to provide a light intensity distribution having an inverse peak pattern that light intensity falls in a zone of the non-single-crystal semiconductor film containing an axis corresponding to the boundary. The phase shifter further includes a small region which extends into at least one of the first and second regions from the boundary and transmits the illumination light by a second phase retardation with respect to the at least one of the first and second regions.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: March 17, 2009
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Patent number: 7413608
    Abstract: A crystallization apparatus includes an illumination system which applies illumination light for crystallization to a non-single-crystal semiconductor film, and a phase shifter which includes first and second regions disposed to form a straight boundary and transmitting the illumination light from the illumination system by a first phase retardation therebetween, and phase-modulates the illumination light to provide a light intensity distribution having an inverse peak pattern that light intensity falls in a zone of the non-single-crystal semiconductor film containing an axis corresponding to the boundary. The phase shifter further includes a small region which extends into at least one of the first and second regions from the boundary and transmits the illumination light by a second phase retardation with respect to the at least one of the first and second regions.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: August 19, 2008
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Publication number: 20080019002
    Abstract: A crystallization apparatus includes an illumination system which applies illumination light for crystallization to a non-single-crystal semiconductor film, and a phase shifter which includes first and second regions disposed to form a straight boundary and transmitting the illumination light from the illumination system by a first phase retardation therebetween, and phase-modulates the illumination light to provide a light intensity distribution having an inverse peak pattern that light intensity falls in a zone of the non-single-crystal semiconductor film containing an axis corresponding to the boundary. The phase shifter further includes a small region which extends into at least one of the first and second regions from the boundary and transmits the illumination light by a second phase retardation with respect to the at least one of the first and second regions.
    Type: Application
    Filed: September 26, 2007
    Publication date: January 24, 2008
    Applicant: Advanced LCD Technologies Dev. Ctr. Co., Ltd
    Inventors: Yukio TANIGUCHI, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Publication number: 20060213431
    Abstract: A crystallization method includes wavefront-dividing an incident light beam into a plurality of light beams, condensing the wavefront-divided light beams in a corresponding phase shift portion of a phase shift mask or in the vicinity of the phase shift portion to form a light beam having an light intensity distribution of an inverse peak pattern in which a light intensity is minimum in a point corresponding to the phase shift portion of the phase shift mask, and irradiating a polycrystalline semiconductor film or an amorphous semiconductor film with the light beam having the light intensity distribution to produce a crystallized semiconductor film.
    Type: Application
    Filed: May 30, 2006
    Publication date: September 28, 2006
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Patent number: 7101436
    Abstract: A crystallization apparatus includes an optical illumination system to illuminate a phase shift mask and which irradiates an amorphous semiconductor film with a light beam having an inverse peak type light intensity distribution including a minimum light intensity in a point corresponding to a phase shift portion of the phase shift mask to produce a crystallized semiconductor film. A wavefront dividing element is disposed on a light path between the optical illumination system and the phase shift mask. The wavefront dividing element wavefront-divides the light beam supplied from the optical illumination system into a plurality of light beams, and condenses the wavefront-divided light beams in the corresponding phase shift portion or in the vicinity of the portion.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: September 5, 2006
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Patent number: 7056626
    Abstract: The present invention is directed to a crystallization apparatus including an illumination system to illuminate a phase shift mask, which converts a light beam from the illumination system into a light beam that has a light intensity distribution of an inverse peak pattern having a minimum intensity in an area corresponding to a phase shift portion of the phase shift mask. The crystallization apparatus further includes an optical member to form on a predetermined plane a light intensity distribution of a concave pattern, which has a light intensity that is minimum in an area corresponding to the phase shift portion and increases toward the circumference of that area based on the light from the illumination system, and an image-forming optical system to set a surface of the polycrystalline semiconductor film or the amorphous semiconductor film or its conjugate plane and the predetermined plane to an optical conjugate relationship.
    Type: Grant
    Filed: July 23, 2003
    Date of Patent: June 6, 2006
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Patent number: 7046341
    Abstract: A substrate processing apparatus of the present invention has a retaining base which retains a substrate, a device detecting undulation or thickness unevenness, and a control device which operates the detecting device. The substrate is deformed in a range of a field to be processed, by locally displacing the retaining base on the basis of the detected undulation or thickness unevenness of the substrate. Blurring of an image formed on the substrate can be thereby prevented.
    Type: Grant
    Filed: May 2, 2005
    Date of Patent: May 16, 2006
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Yukio Taniguchi, Hirotaka Yamaguchi, Susumu Tsujikawa
  • Publication number: 20060065185
    Abstract: A crystallization apparatus includes an illumination system which applies illumination light for crystallization to a non-single-crystal semiconductor film, and a phase shifter which includes first and second regions disposed to form a straight boundary and transmitting the illumination light from the illumination system by a first phase retardation therebetween, and phase-modulates the illumination light to provide a light intensity distribution having an inverse peak pattern that light intensity falls in a zone of the non-single-crystal semiconductor film containing an axis corresponding to the boundary. The phase shifter further includes a small region which extends into at least one of the first and second regions from the boundary and transmits the illumination light by a second phase retardation with respect to the at least one of the first and second regions.
    Type: Application
    Filed: September 13, 2005
    Publication date: March 30, 2006
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Patent number: 7011709
    Abstract: A crystallization apparatus includes an illumination optical system to illuminate a phase shift mask and which irradiates an amorphous semiconductor film with a light beam having an intensity distribution of an inverse peak type having a smallest light intensity in a point corresponding to a phase shift portion of the phase shift mask to generate a crystallized semiconductor film. A convergence/divergence element is disposed on a light path between the illumination optical system and phase shift mask. The convergence/divergence element converts the light beam supplied from the illumination optical system into a light beam having an upward concave intensity distribution in which the light intensity is lowest in the phase shift portion and in which the light intensity increases as distant from the phase shift portion to irradiate the phase shift mask.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: March 14, 2006
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji
  • Patent number: 7001461
    Abstract: A crystallization apparatus includes an illumination system which applies illumination light for crystallization to a non-single-crystal semiconductor film, and a phase shifter which includes first and second regions disposed to form a straight boundary and transmitting the illumination light from the illumination system by a first phase retardation therebetween, and phase-modulates the illumination light to provide a light intensity distribution having an inverse peak pattern that light intensity falls in a zone of the non-single-crystal semiconductor film containing an axis corresponding to the boundary. The phase shifter further includes a small region which extends into at least one of the first and second regions from the boundary and transmits the illumination light by a second phase retardation with respect to the at least one of the first and second regions.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: February 21, 2006
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Hirotaka Yamaguchi, Mikihiko Nishitani, Susumu Tsujikawa, Yoshinobu Kimura, Masayuki Jyumonji