Patents by Inventor Kazufumi Azuma

Kazufumi Azuma 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: 8136479
    Abstract: A plasma treatment apparatus generates a plasma in a treatment vessel by an electromagnetic wave radiated from an electromagnetic wave radiation portion into the treatment vessel to perform plasma treatment by the plasma. At least a part of a wall constituting the treatment vessel includes at least a part of an electromagnetic wave transmission path which transmits the electromagnetic wave.
    Type: Grant
    Filed: March 17, 2005
    Date of Patent: March 20, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hideo Sugai, Tetsuya Ide, Atsushi Sasaki, Kazufumi Azuma, Yukihiko Nakata
  • Publication number: 20110262679
    Abstract: A SiNx film as a barrier film is provided. The film is formed at a low process temperature, has a high water vapor barrier performance and a high light transmittance, and is useful for sealing of a substrate formed by a flexible organic material, such as a plastic substrate. A barrier film is formed by silicon nitride (SiNx) having an atom ratio [N/(Si+N)] indicating a ratio of nitrogen N to silicon Si in the range of 0.60 to 0.65, by using a surface wave plasma chemical vapor deposition (CVD) device.
    Type: Application
    Filed: April 8, 2011
    Publication date: October 27, 2011
    Applicant: SHIMADZU CORPORATION
    Inventors: KAZUFUMI AZUMA, Satoko Ueno, Masayasu Suzuki, Yoshiyuki Konishi, Shinichiro Ishida
  • Patent number: 8009345
    Abstract: A crystallization apparatus includes a light modulation element, and an image forming optical system that forms a light intensity distribution set based on light transmitted through the light modulation element on an irradiation surface. The crystallization apparatus irradiates a non-single crystal semiconductor film with light having the light intensity distribution to generate a crystallized semiconductor film. A curvature radius of at least one isointensity line of a light intensity substantially varies along the isointensity line in the light intensity distribution on the irradiation surface, and a curvature radius of at least a part of the isointensity line has a minimum value of 0.3 ?m or below.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: August 30, 2011
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Kazufumi Azuma, Tomoya Kato, Takahiko Endo
  • Patent number: 7998841
    Abstract: A dehydrogenation treatment method which includes forming a hydrogenated amorphous silicon film above a non-heat-resistant substrate, and eliminating bonded hydrogen from the hydrogenated amorphous silicon film by irradiating an atmospheric thermal plasma discharge to the hydrogenated amorphous silicon film for a time period of 1 to 500 ms. The surface of the substrate is heated at a temperature of 1000 to 2000° C. by irradiating the atmospheric thermal plasma discharge.
    Type: Grant
    Filed: March 4, 2009
    Date of Patent: August 16, 2011
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Kazufumi Azuma, Hajime Shirai
  • Publication number: 20110075237
    Abstract: A crystallization apparatus includes a light modulation element, and an image forming optical system that forms a light intensity distribution set based on light transmitted through the light modulation element on an irradiation surface. The crystallization apparatus irradiates a non-single crystal semiconductor film with light having the light intensity distribution to generate a crystallized semiconductor film. A curvature radius of at least one isointensity line of a light intensity substantially varies along the isointensity line in the light intensity distribution on the irradiation surface, and a curvature radius of at least a part of the isointensity line has a minimum value of 0.3 ?m or below.
    Type: Application
    Filed: December 8, 2010
    Publication date: March 31, 2011
    Inventors: Yukio TANIGUCHI, Masakiyo Matsumura, Kazufumi Azuma, Tomoya Kato, Takahiko Endo
  • Patent number: 7897946
    Abstract: A crystallization apparatus includes a light modulation element, and an image forming optical system that forms a light intensity distribution set based on light transmitted through the light modulation element on an irradiation surface. The crystallization apparatus irradiates a non-single crystal semiconductor film with light having the light intensity distribution to generate a crystallized semiconductor film. A curvature radius of at least one isointensity line of a light intensity substantially varies along the isointensity line in the light intensity distribution on the irradiation surface, and a curvature radius of at least a part of the isointensity line has a minimum value of 0.3 ?m or below.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: March 1, 2011
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Yukio Taniguchi, Masakiyo Matsumura, Kazufumi Azuma, Tomoya Kato, Takahiko Endo
  • Patent number: 7830606
    Abstract: An optical device comprises a first cylindrical lens array in which a plurality of first lens segments each having a first radius of curvature and a first width so as to divide laser light into a plurality of light components are arranged, and a plurality of second lens segments each having a second radius of curvature and a second width, and provided in at least one position of the first cylindrical lens array so as to be arranged between adjacent first lens segments.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: November 9, 2010
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Takashi Ono, Kazufumi Azuma, Masakiyo Matsumura
  • Publication number: 20100239782
    Abstract: An insulating film is formed with a plasma film forming apparatus which includes a vacuum vessel with an electromagnetic wave incident face F, first gas injection holes made in the vacuum vessel, and second gas injection holes made in the vacuum vessel farther away from the electromagnetic wave incident face F than the first gas injection holes. For example, a first gas is introduced from a position whose distance from the electromagnetic wave incident face F is less than 10 mm into the vacuum vessel. A second gas including an organic silicon compound is introduced from a position whose distance from the electromagnetic wave incident face is 10 mm or more into the vacuum vessel.
    Type: Application
    Filed: June 2, 2010
    Publication date: September 23, 2010
    Applicant: Advanced LCD Technologies Dev. Ctr., Co., Ltd
    Inventors: Atsushi SASAKI, Kazufumi Azuma, Tetsuya Ide, Yukihiko Nakata
  • Patent number: 7728251
    Abstract: In a plasma processing apparatus, electromagnetic waves are radiated from slots of waveguides into a processing chamber via dielectric windows that are supported on beams, thereby generating a plasma. A substrate, which is an object of processing, is processed by the generated plasma. Dielectric plates are attached to those surfaces of the beams, which are opposed to the processing chamber. The thickness of each dielectric plate is set at ½ or more of the intra-dielectric wavelength of the electromagnetic waves. Using the plasma processing apparatus, a large-area processing can uniformly be performed.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: June 1, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tetsuya Ide, Atsushi Sasaki, Kazufumi Azuma, Yukihiko Nakata
  • Patent number: 7727913
    Abstract: A method of crystallizing a semiconductor film including splitting a pulse laser beam oscillated from a laser oscillator, and synthesizing the split pulse laser beams after the split pulse laser beams have propagated through optical paths different in optical path length, modulating the synthesized pulse laser beam into a pulse laser beam by a phase modulating element, and irradiating a non-single-crystal film formed on a substrate with the laser beam to crystallize the non-single-crystal film. Splitting the pulse laser beam and synthesizing the split pulse laser beams are performed using at least three optical splitting/synthesizing units arranged in order, and include sequentially splitting one pulse laser beam split by one optical splitting/synthesizing unit by succeeding splitting/synthesizing unit, and synthesizing the other pulse laser beam split by one optical splitting/synthesizing unit with the other pulse laser beam split by preceding splitting/synthesizing unit.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: June 1, 2010
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Shigeyuki Shimoto, Takashi Ono, Kazufumi Azuma, Masakiyo Matsumura
  • Publication number: 20090284839
    Abstract: An optical device comprises a first cylindrical lens array in which a plurality of first lens segments each having a first radius of curvature and a first width so as to divide laser light into a plurality of light components are arranged, and a plurality of second lens segments each having a second radius of curvature and a second width, and provided in at least one position of the first cylindrical lens array so as to be arranged between adjacent first lens segments.
    Type: Application
    Filed: July 24, 2009
    Publication date: November 19, 2009
    Applicant: Advanced LCD Technologies Dev. Ctr. Co., Ltd
    Inventors: Takashi Ono, Kazufumi Azuma, Masakiyo Matsumura
  • Publication number: 20090278060
    Abstract: A photoirradiation apparatus includes an optical modulation element which phase-modulates light, an illumination system to illuminate the optical modulation element, and an imaging optical system which applies the phase-modulated light to a non-single-crystal semiconductor film to form a predetermined light intensity distribution with a strip-like repetitive region having long sides adjacent to each other. The light intensity distribution has a distribution which is downwards convex along a center line in a short side direction and a center line in a long side direction of the repetitive region. The light intensity distribution includes isointensity lines each bent to form a projection from a center of the repetitive region outward in the long side direction. A radius of curvature of an end of at least one isointensity line is not more than 0.3 ?m. A pitch of the repetitive region in the short side direction is not more than 2 ?m.
    Type: Application
    Filed: April 3, 2009
    Publication date: November 12, 2009
    Inventors: Yukio TANIGUCHI, Masakiyo MATSUMURA, Takahiko ENDO, Kazufumi AZUMA
  • Patent number: 7612943
    Abstract: An optical device comprises a first cylindrical lens array in which a plurality of first lens segments each having a first radius of curvature and a first width so as to divide laser light into a plurality of light components are arranged, and a plurality of second lens segments each having a second radius of curvature and a second width, and provided in at least one position of the first cylindrical lens array so as to be arranged between adjacent first lens segments.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: November 3, 2009
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Takashi Ono, Kazufumi Azuma, Masakiyo Matsumura
  • Publication number: 20090246939
    Abstract: A dehydrogenation treatment method which includes forming a hydrogenated amorphous silicon film above a non-heat-resistant substrate, and eliminating bonded hydrogen from the hydrogenated amorphous silicon film by irradiating an atmospheric thermal plasma discharge to the hydrogenated amorphous silicon film for a time period of 1 to 500 ms. The surface of the substrate is heated at a temperature of 1000 to 2000° C. by irradiating the atmospheric thermal plasma discharge.
    Type: Application
    Filed: March 4, 2009
    Publication date: October 1, 2009
    Inventors: Kazufumi AZUMA, Hajime Shirai
  • Publication number: 20090134394
    Abstract: A crystal silicon array includes a crystallized unit region obtained by crystallizing at least a part of a non-single crystal semiconductor film. The crystallized unit region includes at least one square two-dimensional crystal portion having a size of 7 ?m square or more, and at least one needle crystal portion having a grain length of 3.5 ?m or more.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 28, 2009
    Inventors: Kazufumi AZUMA, Shigeyuki Shimoto, Masakiyo Matsumura, Takahiko Endo, Yukio Taniguchi, Tomoya Kato
  • Publication number: 20090061603
    Abstract: A method of crystallizing a semiconductor film including splitting a pulse laser beam oscillated from a laser oscillator, and synthesizing the split pulse laser beams after the split pulse laser beams have propagated through optical paths different in optical path length, modulating the synthesized pulse laser beam into a pulse laser beam by a phase modulating element, and irradiating a non-single-crystal film formed on a substrate with the laser beam to crystallize the non-single-crystal film. Splitting the pulse laser beam and synthesizing the split pulse laser beams are performed using at least three optical splitting/synthesizing units arranged in order, and include sequentially splitting one pulse laser beam split by one optical splitting/synthesizing unit by succeeding splitting/synthesizing unit, and synthesizing the other pulse laser beam split by one optical splitting/synthesizing unit with the other pulse laser beam split by preceding splitting/synthesizing unit.
    Type: Application
    Filed: September 2, 2008
    Publication date: March 5, 2009
    Inventors: Shigeyuki SHIMOTO, Takashi Ono, Kazufumi Azuma, Masakiyo Matsumura
  • Publication number: 20090029507
    Abstract: A high-quality dielectric film is formed by generating plasma of a high electron density by a method such as diluting a rare gas or raising a frequency of a power supplier, and generating oxygen atoms or nitrogen atoms of a high density. The dielectric film contains silicon oxide in which the composition ratio of silicon and oxygen is between (1:1.94) and (1:2) both inclusive, silicon nitride in which the composition ratio of silicon and nitrogen is between (1:1.94) and (1:2) both inclusive, or silicon oxynitride in which the composition ratio of silicon and nitrogen is between (3:3.84) and (3:4) both inclusive.
    Type: Application
    Filed: November 28, 2007
    Publication date: January 29, 2009
    Applicant: Kabushiki Kaisha Ekisho Sentan
    Inventors: Masashi Goto, Yukihiko Nakata, Kazufumi Azuma, Tetsuya Okamoto
  • Patent number: 7446060
    Abstract: Disclosed is a film-forming method, comprising supplying into a plasma processing chamber at least three kinds of gases including a silicon compound gas, an oxidizing gas, and a rare gas, the percentage of the partial pressure of the rare gas (Pr) based on the total pressure being not smaller than 85%, i.e., 85%?Pr<100%, and generating a plasma within the plasma processing chamber so as to form a film of silicon oxide on a substrate to be processed.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: November 4, 2008
    Assignee: Advanced LCD Technologies Development Center Co., Ltd.
    Inventors: Masashi Goto, Kazufumi Azuma, Yukihiko Nakata
  • Publication number: 20080230725
    Abstract: A crystallization apparatus includes a light modulation element, and an image forming optical system that forms a light intensity distribution set based on light transmitted through the light modulation element on an irradiation surface. The crystallization apparatus irradiates a non-single crystal semiconductor film with light having the light intensity distribution to generate a crystallized semiconductor film. A curvature radius of at least one isointensity line of a light intensity substantially varies along the isointensity line in the light intensity distribution on the irradiation surface, and a curvature radius of at least a part of the isointensity line has a minimum value of 0.3 ?m or below.
    Type: Application
    Filed: March 19, 2008
    Publication date: September 25, 2008
    Inventors: Yukio TANIGUCHI, Masakiyo Matsumura, Kazufumi Azuma, Tomoya Kato, Takahiko Endo
  • Publication number: 20080112057
    Abstract: An optical device comprises a first cylindrical lens array in which a plurality of first lens segments each having a first radius of curvature and a first width so as to divide laser light into a plurality of light components are arranged, and a plurality of second lens segments each having a second radius of curvature and a second width, and provided in at least one position of the first cylindrical lens array so as to be arranged between adjacent first lens segments.
    Type: Application
    Filed: October 19, 2007
    Publication date: May 15, 2008
    Inventors: Takashi Ono, Kazufumi Azuma, Masakiyo Matsumura