Patents by Inventor Yasushi Okubo

Yasushi Okubo 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: 7314690
    Abstract: In a method of producing a photomask (10) in which a light-transmissive substrate (1) is formed thereon with a chromium pattern (21) having a global opening ratio difference in its plane on the light-transmissive substrate (1), use is made, as an etching mask for a chromium film (2), of an etching mask pattern (31) made of an inorganic-based material having a resistance against etching of the chromium film (2). Dry etching of the chromium film (2) is carried out under a condition selected from conditions that cause damage to a resist pattern (41) to a degree which is unallowable when etching the chromium film (2) using the resist pattern (41) as a mask.
    Type: Grant
    Filed: April 9, 2004
    Date of Patent: January 1, 2008
    Assignee: Hoya Corporation
    Inventors: Yasushi Okubo, Mutsumi Hara
  • Publication number: 20070264583
    Abstract: A method of manufacturing a mask blank includes a thin film forming step of forming a thin film, which becomes a mask pattern, on a mask blank substrate and a resist film forming step of forming a resist film on the thin film. The method further includes a step of storing resist film forming information including information about a date of formation of the resist film on the thin film, a step of correlating the resist film forming information with the mask blank, a step of identifying, based on the resist film forming information, the mask blank having the resist film whose sensitivity change exceeds an allowable range, a step of stripping the resist film formed in the identified mask blank, and a step of forming again a resist film on the thin film stripped of the resist film.
    Type: Application
    Filed: November 4, 2005
    Publication date: November 15, 2007
    Applicant: Hoya Corporation
    Inventor: Yasushi Okubo
  • Patent number: 7264890
    Abstract: An electroluminescent element is disclosed, comprising an electroluminescent material and a fluorescent substance emitting light having an emission maximum at the wavelength different from that of light emitted from the electroluminescent material upon absorption of the light emitted from the electroluminescent material. A color conversion filter is also disclosed, comprising a fluorescent substance emitting light having an emission maximum at the wavelengths of 400 to 700 nm upon absorption of the light emitted from the electroluminescent material.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: September 4, 2007
    Assignee: Konica Corporation
    Inventors: Hiroshi Kita, Yoshiyuki Suzuri, Taketoshi Yamada, Kazuaki Nakamura, Noriko Ueda, Yasushi Okubo
  • Publication number: 20070111490
    Abstract: In the photomask blank 100, which is an original plate of a transfer mask having a transfer pattern to be transferred to the body to be subjected to transfer on the substrate 10, the photomask blank 100 includes a light shielding film 20 becoming the transfer pattern and a resist film 30 on the substrate 10, and the resist film 30 formed on the peripheral edge of the main surface of the substrate 10 is removed in a predetermined region in a supported region 31 of the photomask blank 100 supported by the substrate holding member of the exposure device, so that a desired pattern positional accuracy and a desired focus accuracy are obtained, when the transfer mask having the transfer pattern obtained by patterning the light shielding film 20 is supported by the substrate holding member of the exposure device.
    Type: Application
    Filed: March 31, 2004
    Publication date: May 17, 2007
    Applicant: HOYA CORPORATION
    Inventors: Yasushi Okubo, Yasunori Yokoya
  • Publication number: 20070020485
    Abstract: An electroluminescent element is disclosed, comprising an electroluminescent material and a fluorescent substance emitting light having an emission maximum at the wavelength different from that of light emitted from the electroluminescent material upon absorption of the light emitted from the electroluminescent material. A color conversion filter is also disclosed, comprising a fluorescent substance emitting light having an emission maximum at the wavelengths of 400 to 700 nm upon absorption of the light emitted from the electroluminescent material.
    Type: Application
    Filed: July 26, 2006
    Publication date: January 25, 2007
    Applicant: KONICA CORPORATION
    Inventors: Hiroshi Kita, Yoshiyuki Suzuri, Taketoshi Yamada, Kazuaki Nakamura, Noriko Ueda, Yasushi Okubo
  • Publication number: 20070009674
    Abstract: A transparent film for display substrate containing a cellulose ester, a plasticizer content in an amount of less than 1 percent, the aformentioned film being drawn 3 through 100 percent both in the direction of conveyance and across the width.
    Type: Application
    Filed: May 12, 2004
    Publication date: January 11, 2007
    Inventors: Yasushi Okubo, Kazuto Kiyohara, Satomi Kawabe
  • Patent number: 7141304
    Abstract: A film substrate of an electronic displaying element, an electronic optical element, a touch panel, or a solar battery is disclosed which is composed mainly of an organic polymer having water solubility of 0 to 5 g based on 100 g of 25° C. water and having acetone solubility of 25 to 100 g based on 100 g of 25° C. acetone and an inorganic condensation polymer of a reactive metal compound capable of being condensed.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: November 28, 2006
    Assignee: Konica Corporation
    Inventors: Taketoshi Yamada, Hiroshi Kita, Koichi Saito, Yasushi Okubo
  • Publication number: 20060246361
    Abstract: A method of manufacturing a mask blank glass substrate includes a marking step of irradiating laser light onto a mirror-like surface in an area, having no influence on transfer, on a surface of the mask blank glass substrate to thereby form a pit that is used as a marker for identifying or managing the mask blank glass substrate.
    Type: Application
    Filed: March 29, 2006
    Publication date: November 2, 2006
    Inventors: Akinori Kurikawa, Hisashi Kasahara, Yasushi Okubo
  • Publication number: 20060233973
    Abstract: A method of producing a cellulose ester film comprising the steps of: (i) melting a cellulose ester containing 5.0% by weight or less of water at a temperature in the range of 150 to 300° C.; and (ii) melt casting the molten cellulose ester to form the cellulose ester film, wherein a compound having both a phenol moiety and a hindered amine moiety in the molecule is incorporated in the cellulose ester.
    Type: Application
    Filed: April 11, 2006
    Publication date: October 19, 2006
    Inventors: Kazuaki Nakamura, Kazuto Kiyohara, Satomi Kawabe, Akihiko Takeda, Yasushi Okubo
  • Publication number: 20060167201
    Abstract: A film substrate of an electronic displaying element, an electronic optical element, a touch panel, or a solar battery is disclosed which is composed mainly of an organic polymer having water solubility of 0 to 5 g based on 100 g of 25° C. water and having acetone solubility of 25 to 100 g based on 100 g of 25° C. acetone and an inorganic condensation polymer of a reactive metal compound capable of being condensed.
    Type: Application
    Filed: March 30, 2006
    Publication date: July 27, 2006
    Inventors: Taketoshi Yamada, Hiroshi Kita, Koichi Saito, Yasushi Okubo
  • Publication number: 20060127607
    Abstract: A plasticizer comprising an ester compound produced by a condensation reaction of an organic acid represented by Formula (1) with a polyhydric alcohol having at least 3 hydroxyl groups in the molecule.
    Type: Application
    Filed: December 6, 2005
    Publication date: June 15, 2006
    Inventors: Yasushi Okubo, Kazuto Kiyohara, Satomi Kawabe, Akihiko Takeda, Takayuki Suzuki, Kazuaki Nakamura
  • Publication number: 20060069192
    Abstract: A method for manufacturing a cellulose ester film comprising the steps of 1) mixing a cellulose ester exhibiting a water content of not greater than 3.0 weight %, at least one plasticizer selected from the groups A and B in an amount of one to thirty weight % of the cellulose ester, and at least one additive selected from the groups of C and D in an amount of 0.01 to 5 weight % of the cellulose ester to obtain a mixture, group A: ester plasticizers formed from a polyhydric alcohol and a monohydric carboxylic acid; group B: ester plasicizers formed from a polyhydlic carboxylic acid and a monohydric alcohol; group C: hindered phenol anti-oxidants; group D: hindered amine light stabilizers, 2) heating to melt the mixture at a temperature (Tm) of between 150 and 300° C., and 3) forming a cellulose ester film with a melt casting method employing the melted mixture.
    Type: Application
    Filed: September 15, 2005
    Publication date: March 30, 2006
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventors: Kazuaki Nakamura, Kazuto Kiyohara, Satomi Kawabe, Akihiko Takeda, Yasushi Okubo
  • Patent number: 6946519
    Abstract: Disclosed are an organic-inorganic hybrid film comprising a cellulose derivative and a polycondensation product of a condensation polymerizable reactive metal compound, wherein the film contains a plasticizer in an amount of 1 to 20% by weight and its manufacturing method.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: September 20, 2005
    Assignee: Konica Corporation
    Inventors: Yasushi Okubo, Takahiro Takagi, Yasuo Kurachi, Kaori Ono
  • Publication number: 20050019674
    Abstract: In a method of producing a photomask (10) in which a light-transmissive substrate (1) is formed thereon with a chromium pattern (21) having a global opening ratio difference in its plane on the light-transmissive substrate (1), use is made, as an etching mask for a chromium film (2), of an etching mask pattern (31) made of an inorganic-based material having a resistance against etching of the chromium film (2). Dry etching of the chromium film (2) is carried out under a condition selected from conditions that cause damage to a resist pattern (41) to a degree which is unallowable when etching the chromium film (2) using the resist pattern (41) as a mask.
    Type: Application
    Filed: April 9, 2004
    Publication date: January 27, 2005
    Inventors: Yasushi Okubo, Mutsumi Hara
  • Publication number: 20040150331
    Abstract: A transparent resin film for an electronic display and its manufacturing method are disclosed, the transparent resin film having an ultraviolet light transmittance of not less than 50%, the ultraviolet light having a wavelength range of from 250 to 450 nm, and having a glass transition temperature of not less than 180° C., the glass transition temperature being measured according to thermal stress strain measurement (TMA).
    Type: Application
    Filed: January 20, 2004
    Publication date: August 5, 2004
    Inventors: Yasushi Okubo, Takahiro Takagi, Kaori Ono
  • Publication number: 20040096696
    Abstract: An electroluminescent element is disclosed, comprising an electroluminescent material and a fluorescent substance emitting light having an emission maximum at the wavelength different from that of light emitted from the electroluminescent material upon absorption of the light emitted from the electroluminescent material. A color conversion filter is also disclosed, comprising a fluorescent substance emitting light having an emission maximum at the wavelengths of 400 to 700 nm upon absorption of the light emitted from the electroluminescent material.
    Type: Application
    Filed: August 28, 2003
    Publication date: May 20, 2004
    Applicant: KONICA CORPORATION
    Inventors: Hiroshi Kita, Yoshiyuki Suzuri, Taketoshi Yamada, Kazuaki Nakamura, Noriko Ueda, Yasushi Okubo
  • Publication number: 20040072019
    Abstract: An electroluminescent element is disclosed, comprising an electroluminescent material and a fluorescent substance emitting light having an emission maximum at the wavelength different from that of light emitted from the electroluminescent material upon absorption of the light emitted from the electroluminescent material. A color conversion filter is also disclosed, comprising a fluorescent substance emitting light having an emission maximum at the wavelengths of 400 to 700 nm upon absorption of the light emitted from the electroluminescent material.
    Type: Application
    Filed: September 2, 2003
    Publication date: April 15, 2004
    Applicant: KONICA CORPORATION
    Inventors: Hiroshi Kita, Yoshiyuki Suzuri, Taketoshi Yamada, Kazuaki Nakamura, Noriko Ueda, Yasushi Okubo
  • Publication number: 20040062951
    Abstract: An electroluminescent element with an electroluminescent material and a fluorescent substance. The fluorescent substance emits light having an emission maximum at a wavelength different from that of light emitted from the electroluminescent material upon absorption of the light emitted from the electroluminescent material. A color conversion filter is also disclosed. The color conversion filter has a fluorescent substance emitting light having an emission maximum at the wavelengths of 400 to 700 nm upon absorption of the light emitted from the electroluminescent material.
    Type: Application
    Filed: September 11, 2003
    Publication date: April 1, 2004
    Applicant: KONICA CORPORATION
    Inventors: Hiroshi Kita, Yoshiyuki Suzuri, Taketoshi Yamada, Kazuaki Nakamura, Noriko Ueda, Yasushi Okubo
  • Publication number: 20040058195
    Abstract: An electroluminescent element is disclosed, comprising an electroluminescent material and a fluorescent substance emitting light having an emission maximum at the wavelength different from that of light emitted from the electroluminescent material upon absorption of the light emitted from the electroluminescent material. A color conversion filter is also disclosed, comprising a fluorescent substance emitting light having an emission maximum at the wavelengths of 400 to 700 nm upon absorption of the light emitted from the electroluminescent material.
    Type: Application
    Filed: September 4, 2003
    Publication date: March 25, 2004
    Applicant: KONICA CORPORATION
    Inventors: Hiroshi Kita, Yoshiyuki Suzuri, Taketoshi Yamada, Kazuaki Nakamura, Noriko Ueda, Yasushi Okubo
  • Publication number: 20040044127
    Abstract: Disclosed are an organic-inorganic hybrid film comprising a cellulose derivative and a polycondensation product of a condensation polymerizable reactive metal compound, wherein the film contains a plasticizer in an amount of 1 to 20% by weight and its manufacturing method.
    Type: Application
    Filed: August 13, 2003
    Publication date: March 4, 2004
    Applicant: Konica Corporation
    Inventors: Yasushi Okubo, Takahiro Takagi, Yasuo Kurachi, Kaori Ono