Patents by Inventor Yoshimi Shirakawa
Yoshimi Shirakawa 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).
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Patent number: 7230381Abstract: A method of manufacturing a panel assembly is used for making a plasma display panel having electrodes and ribs formed on a substrate. The method includes the steps of forming the electrodes on the substrate so that these electrodes are extended to a periphery of the substrate to form their terminals, applying a terminal protective paste on the terminals for protecting the terminals, applying a rib paste on the entire area of a rib formation region provided on the substrate, molding the rib paste by use of a stamping die having cavities in the form of rib shape into green ribs, and firing the terminal protective paste and the green ribs simultaneously to form a terminal protective layer and ribs on the substrate.Type: GrantFiled: July 7, 2005Date of Patent: June 12, 2007Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Tatsuya Ohkubo, Yoshimi Shirakawa
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Patent number: 7008284Abstract: A method of manufacturing a panel assembly is used for making a plasma display panel having electrodes and ribs formed on a substrate. The method includes the steps of forming the electrodes on the substrate so that these electrodes are extended to a periphery of the substrate to form their terminals, applying a terminal protective paste on the terminals for protecting the terminals, applying a rib paste on the entire area of a rib formation region provided on the substrate, molding the rib paste by use of a stamping die having cavities in the form of rib shape into green ribs, and firing the terminal protective paste and the green ribs simultaneously to form a terminal protective layer and ribs on the substrate.Type: GrantFiled: August 11, 2003Date of Patent: March 7, 2006Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Tatsuya Ohkubo, Yoshimi Shirakawa
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Publication number: 20050245166Abstract: A method of manufacturing a panel assembly is used for making a plasma display panel having electrodes and ribs formed on a substrate. The method includes the steps of forming the electrodes on the substrate so that these electrodes are extended to a periphery of the substrate to form their terminals, applying a terminal protective paste on the terminals for protecting the terminals, applying a rib paste on the entire area of a rib formation region provided on the substrate, molding the rib paste by use of a stamping die having cavities in the form of rib shape into green ribs, and firing the terminal protective paste and the green ribs simultaneously to form a terminal protective layer and ribs on the substrate.Type: ApplicationFiled: July 7, 2005Publication date: November 3, 2005Applicant: Fujitsu Hitachi Plasma Display LimitedInventors: Tatsuya Ohkubo, Yoshimi Shirakawa
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Patent number: 6855026Abstract: A partition is formed by the process including a step for providing a sheet-like partition material that covers a display area and outside thereof on the surface of the substrate, a step for providing a mask for patterning that covers the display area and the outside thereof, so that a pattern of the portion arranged outside of the display area of the mask is a grid-like pattern, a step for patterning the partition material covered partially with the mask by a sandblasting process, and a step for baking the partition material after the patterning.Type: GrantFiled: October 8, 2003Date of Patent: February 15, 2005Assignees: Fujitsu Limited, Fujitsu Hitachi Plasma Display LimitedInventors: Akihiro Fujinaga, Kazunori Ishizuka, Tatsutoshi Kanae, Kazuhide Iwasaki, Toshiyuki Nanto, Yoshimi Kawanami, Masayuki Shibata, Yasuhiko Kunii, Tadayoshi Kosaka, Osamu Toyoda, Yoshimi Shirakawa
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Patent number: 6758905Abstract: The present invention provides a fluorescent layer forming apparatus for applying a fluorescent material paste into a recess defined between barrier ribs formed on a substrate for formation of a fluorescent layer in a plasma display panel production process. The apparatus comprises: a nozzle for ejecting the fluorescent material paste; and a plurality of fine attachments provided at one end of the nozzle with distal end portions thereof being arranged in convergent relation. The fluorescent material paste is ejected along the plurality of fine attachments thereby to be applied into the recess without formation of a clot. Thus, the fluorescent layer can accurately be formed in the intended recess between the barrier ribs without adhesion of the fluorescent material paste onto the top edges of the barrier ribs.Type: GrantFiled: April 22, 2003Date of Patent: July 6, 2004Assignee: Fujitsu Hitachi Plasma Display LimitedInventors: Kazuo Suzuki, Yoshimi Shirakawa, Tatsutoshi Kanae
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Publication number: 20040072493Abstract: A partition is formed by the process including a step for providing a sheet-like partition material that covers a display area and outside thereof on the surface of the substrate, a step for providing a mask for patterning that covers the display area and the outside thereof, so that a pattern of the portion arranged outside of the display area of the mask is a grid-like pattern, a step for patterning the partition material covered partially with the mask by a sandblasting process, and a step for baking the partition material after the patterning.Type: ApplicationFiled: October 8, 2003Publication date: April 15, 2004Applicant: FUJITSU LIMITEDInventors: Akihiro Fujinaga, Kazunori Ishizuka, Tatsutoshi Kanae, Kazuhide Iwasaki, Toshiyuki Nanto, Yoshimi Kawanami, Masayuki Shibata, Yasuhiko Kunii, Tadayoshi Kosaka, Osamu Toyoda, Yoshimi Shirakawa
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Publication number: 20040043693Abstract: A method of manufacturing a panel assembly is used for making a plasma display panel having electrodes and ribs formed on a substrate. The method includes the steps of forming the electrodes on the substrate so that these electrodes are extended to a periphery of the substrate to form their terminals, applying a terminal protective paste on the terminals for protecting the terminals, applying a rib paste on the entire area of a rib formation region provided on the substrate, molding the rib paste by use of a stamping die having cavities in the form of rib shape into green ribs, and firing the terminal protective paste and the green ribs simultaneously to form a terminal protective layer and ribs on the substrate.Type: ApplicationFiled: August 11, 2003Publication date: March 4, 2004Applicant: Fujitsu Hitachi Plasma Display LimitedInventors: Tatsuya Ohkubo, Yoshimi Shirakawa
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Publication number: 20030203099Abstract: The present invention provides a fluorescent layer forming apparatus for applying a fluorescent material paste into a recess defined between barrier ribs formed on a substrate for formation of a fluorescent layer in a plasma display panel production process. The apparatus comprises: a nozzle for ejecting the fluorescent material paste; and a plurality of fine attachments provided at one end of the nozzle with distal end portions thereof being arranged in convergent relation. The fluorescent material paste is ejected along the plurality of fine attachments thereby to be applied into the recess without formation of a clot. Thus, the fluorescent layer can accurately be formed in the intended recess between the barrier ribs without adhesion of the fluorescent material paste onto the top edges of the barrier ribs.Type: ApplicationFiled: April 22, 2003Publication date: October 30, 2003Applicant: FUJITSU HITACHI PLASMA DISPLAY LIMITEDInventors: Kazuo Suzuki, Yoshimi Shirakawa, Tatsutoshi Kanae
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Publication number: 20030189405Abstract: The present invention is a method for forming ribs for a plasma display panel. The method includes: forming a rib material layer having a predetermined thickness; forming band-shaped barrier rib masks on the rib material layer, each of the barrier rib masks having a pattern corresponding to a barrier rib; forming at least one dummy rib mask for forming at least one dummy rib for each barrier rib, the dummy rib mask being spaced apart from an end of each barrier rib mask in a longitudinal direction of the barrier rib mask; and performing sandblast by blowing abrasive onto the rib material layer and the barrier rib and dummy rib masks, thereby forming the barrier ribs.Type: ApplicationFiled: March 31, 2003Publication date: October 9, 2003Applicant: Fujitsu Hitachi Plasma Display LimitedInventors: Yoshimi Shirakawa, Akihiro Fujinaga, Kazunori Ishizuka
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Patent number: 6394163Abstract: A method for forming a plurality of stripe-like phosphor layers on a surface of a substrate constituting a plasma display panel, the surface having a plurality of parallel ribs disposed thereon and grooves defined between two adjacent ribs, includes the steps of: molding a phosphor paste composed of a phosphor substance and a first synthetic resin into filament-like article; placing the molded filament-like article into each groove; filling the grooves with a solvent optionally containing a second synthetic resin compatible with the first synthetic resin; and conducting a sintering treatment of the substrate to form the phosphor layers in the grooves.Type: GrantFiled: October 18, 2000Date of Patent: May 28, 2002Assignee: Fujitsu LimitedInventor: Yoshimi Shirakawa
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Patent number: 6156141Abstract: A method for forming a plurality of stripe-like phosphor layers on a surface of a substrate constituting a plasma display panel, the surface having a plurality of parallel ribs disposed thereon and grooves defined between two adjacent ribs, includes the steps of: molding a phosphor paste composed of a phosphor substance and a first synthetic resin into filament-like article; placing the molded filament-like article into each groove; filling the grooves with a solvent optionally containing a second synthetic resin compatible with the first synthetic resin; and conducting a sintering treatment of the substrate to form the phosphor layers in the grooves.Type: GrantFiled: July 31, 1998Date of Patent: December 5, 2000Assignee: Fujitsu LimitedInventor: Yoshimi Shirakawa
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Patent number: 6012388Abstract: A screen printing method and apparatus for forming a predetermined pattern film, particularly phosphor material stripes for a plasma display panel, and which facilitates design of the screen mask and provides a measure for change of printing conditions, size error due to enlargement or reduction in size of the screen or change of specifications. The method prints printing material on a printing surface using a screen which is extended over a frame and has apertures corresponding to the printing pattern, and includes the steps of applying an external pressure to the frame from at least one side surface to deform the frame, and printing the printing material on the printing surface via the apertures under the condition that size of the apertures has been changed. The apparatus includes a screen having the apertures in the shape corresponding to the printing pattern, a frame for supporting the screen with a predetermined tension, and a device for applying pressure to at least one side surface of the frame.Type: GrantFiled: March 17, 1998Date of Patent: January 11, 2000Assignee: Fujitsu LimitedInventors: Yoshimi Shirakawa, Shoichi Kawabe, Masaaki Sasaka, Minoru Mikame
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Patent number: 5286658Abstract: A semiconductor device is produced by a process for intrinsic gettering heat treatment of a silicon crystal in which the concentration of C--O complex defects destined to form seeds for oxygen precipitation in the silicon crystal is increased or an amount of oxygen precipitate in the silicon crystal is controlled, to thereby eliminate the dispersion of the amount from one crystal to another. In the heat treatment of the silicon crystal, the amount of oxygen precipitation can be controlled with a high accuracy.Type: GrantFiled: March 5, 1992Date of Patent: February 15, 1994Assignee: Fujitsu LimitedInventors: Yoshimi Shirakawa, Hiroshi Kaneta
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Patent number: RE41312Abstract: A partition is formed by the process including a step for providing a sheet-like partition material that covers a display area and outside thereof on the surface of the substrate, a step for providing a mask for patterning that covers the display area and the outside thereof, so that a pattern of the portion arranged outside of the display area of the mask is a grid-like pattern, a step for patterning the partition material covered partially with the mask by a sandblasting process, and a step for baking the partition material after the patterning.Type: GrantFiled: February 14, 2007Date of Patent: May 4, 2010Assignees: Fujitsu Hitachi Plasma Display Limited, Hitachi, Ltd.Inventors: Akihiro Fujinaga, Kazunori Ishizuka, Tatsutoshi Kanae, Kazuhide Iwasaki, Toshiyuki Nanto, Yoshimi Kawanami, Masayuki Shibata, Yasuhiko Kunii, Tadayoshi Kosaka, Osamu Toyoda, Yoshimi Shirakawa
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Patent number: RE42405Abstract: A partition is formed by the process including a step for providing a sheet-like partition material that covers a display area and outside thereof on the surface of the substrate, a step for providing a mask for patterning that covers the display area and the outside thereof, so that a pattern of the portion arranged outside of the display area of the mask is a grid-like pattern, a step for patterning the partition material covered partially with the mask by a sandblasting process, and a step for baking the partition material after the patterning.Type: GrantFiled: December 4, 2008Date of Patent: May 31, 2011Assignees: Fujitsu Hitachi Plasma Display Limited, Hitachi Plasma Patent Licensing Co., Ltd.Inventors: Akihiro Fujinaga, Kazunori Ishizuka, Tatsutoshi Kanae, Kazuhide Iwasaki, Toshiyuki Nanto, Yoshimi Kawanami, Masayuki Shibata, Yasuhiko Kunii, Tadayoshi Kosaka, Osamu Toyoda, Yoshimi Shirakawa
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Patent number: RE44445Abstract: A partition is formed by the process including a step for providing a sheet-like partition material that covers a display area and outside thereof on the surface of the substrate, a step for providing a mask for patterning that covers the display area and the outside thereof, so that a pattern of the portion arranged outside of the display area of the mask is a grid-like pattern, a step for patterning the partition material covered partially with the mask by a sandblasting process, and a step for baking the partition material after the patterning.Type: GrantFiled: May 27, 2011Date of Patent: August 20, 2013Assignees: Hitachi Consumer Electronics Co., Ltd., Hitachi, Ltd.Inventors: Akihiro Fujinaga, Kazunori Ishizuka, Tatsutoshi Kanae, Kazuhide Iwasaki, Toshiyuki Nanto, Yoshimi Kawanami, Masayuki Shibata, Yasuhiko Kunii, Tadayoshi Kosaka, Osamu Toyoda, Yoshimi Shirakawa