Patents by Inventor Keisuke Sumida

Keisuke Sumida 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: 7040947
    Abstract: A method of manufacturing at least two layer electrodes that can be utilized, for example, as bus and data electrodes in a plasma display device, includes depositing each layer in a coating step and subsequently exposing the layers at the same time for development. The layers are subsequently baked at the same time. One layer can be thinner than the other layer during a time period between the developing step and the baking step.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: May 9, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideki Ashida, Junichi Hibino, Keisuke Sumida, Mitsuhiro Ohtani, Shinya Fujiwara, Hideki Marunaka, Tadashi Nakagawa
  • Patent number: 7034458
    Abstract: A manufacturing method for a metal electrode used for a bus electrode, a data electrode, and the like which make up a display panel including a PDP (Plasma Display Panel) by which, when these electrodes are patterned according to a photolithographic method, the edge curl phenomenon can be substantially controlled to the extent that the phenomenon is negligible. The manufacturing method of the invention therefore includes a dry step for drying the layers making up the metal electrode so that flows (F1, F2, and F3) of the solvent occur from a region having a high absorbency of the solvent to a region having a lower absorbency of the solvent.
    Type: Grant
    Filed: February 8, 2005
    Date of Patent: April 25, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideki Asida, Shinya Fujiwara, Hideki Marunaka, Tadashi Nakagawa, Keisuke Sumida, Hideaki Yasui, Kazuhiko Sugimoto, Hiroyosi Tanaka
  • Patent number: 7002297
    Abstract: To provide a technique for relatively easily preventing yellowing of a PDP that uses silver electrodes, and a PDP utilizing the technique that is capable of displaying images with high luminance and high quality. To form the electrodes, an alloy composed of Ag as a main constituent and a transition metal (at least one selected from Cu, Cr, Co, Ni, Mn, and Fe) is used, or an oxide of such a transition metal is added. Alternatively, an alloy composed of Ag as a main constituent and a metal (at least one selected from Ru, Rh, Ir, Os, and Re) is used, or an oxide of such a metal is added. Alternatively, Ag particles whose surfaces are each coated with a metal (Pd, Cu, Cr, Ni, Ir, or Ru) or a metal oxide (SiO2, Al2O3, NiO, ZrO2, Fe2O3, ZnO, In2O3, CuO, TiO2, or Pr6O11) are used.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: February 21, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masaki Aoki, Mitsuhiro Ohtani, Junichi Hibino, Keisuke Sumida, Hideki Asida, Shinya Fujiwara, Hideki Marunaka, Tadashi Nakagawa
  • Publication number: 20050181697
    Abstract: An object of the present invention is to provide a method for manufacturing electrodes that can effectively suppress edge-curl when metal electrodes such as bus electrodes and data electrodes are patterned mainly by a photolithography method. In order to achieve the above object, in the manufacturing method in the present invention, an amount of undercut generated by difference in a degree of dissolution caused by developing solution is controlled, and baking is performed at a temperature such that glass in a protrusion formed at side edges becomes soft so as to touch a substrate by gravity. With such method for manufacturing, it becomes possible to make the side edges rounded whose curvature changes continuously.
    Type: Application
    Filed: March 29, 2005
    Publication date: August 18, 2005
    Inventors: Hideki Ashida, Junichi Hibino, Keisuke Sumida, Mitsuhiro Ohtani, Shinya Fujiwara, Hideki Marunaka, Tadashi Nakagawa
  • Publication number: 20050160768
    Abstract: The present invention provides a manufacturing method of a glass substrate for an image display device having high picture quality. Reducing force in a float furnace is controlled to be decreased so that Sn++ content on a surface of the glass substrate forming an Ag electrode is a predetermined value or less. When the resultant Sn++ content on the surface of the glass substrate forming the Ag electrode exceeds the predetermined value, the surface is partially removed to decrease the Sn++ content to the predetermined value or less to suppress occurrence of yellowing of the glass substrate.
    Type: Application
    Filed: November 27, 2003
    Publication date: July 28, 2005
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Daisuke Adachi, Hiroyasu Tsuji, Keisuke Sumida
  • Publication number: 20050134177
    Abstract: A manufacturing method for a metal electrode used for a bus electrode, a data electrode, and the like which make up a display panel including a PDP (Plasma Display Panel) by which, when these electrodes are patterned according to a photolithographic method, the edge curl phenomenon can be substantially controlled to the extent that the phenomenon is negligible. The manufacturing method of the invention therefore includes a dry step for drying the layers making up the metal electrode so that flows (F1, F2, and F3) of the solvent occur from a region having a high absorbency of the solvent to a region having a lower absorbency of the solvent.
    Type: Application
    Filed: February 8, 2005
    Publication date: June 23, 2005
    Inventors: Hideki Asida, Shinya Fujiwara, Hideki Marunaka, Tadashi Nakagawa, Keisuke Sumida, Hideaki Yasui, Kazuhiko Sugimoto, Hiroyosi Tanaka
  • Patent number: 6893490
    Abstract: An ink for a display panel that at a time of application is a mixture of a powder material, a water-soluble resin included in a range of 1 wt % to 20 wt % inclusive of the ink, and a water-miscible solvent. The ink is water-soluble, and in comparison to conventional organic inks, the ink of the present invention exhibits a markedly reduced susceptibility to the occurrence of electrostatic action. Thus, even when the ink is discharged through a plurality of fine nozzle holes, for example, it is possible for the application process to be conducted with great efficiency, since the individual ink flows discharged from the nozzle holes flow in a vertically downward direction without reacting with each other and becoming warped as a result. The ink of the present invention may, for example, be a phosphor ink, an Ag electrode ink, a shading film (black matrix) ink, a sealant glass ink, or a white reflective layer ink, and the ink may be used in forming structural layers of a display panel.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: May 17, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyuki Kawamura, Keisuke Sumida, Shigeo Suzuki
  • Patent number: 6891331
    Abstract: An object of the present invention is to provide a method for manufacturing electrodes that can effectively suppress edge-curl when metal electrodes such as bus electrodes and data electrodes are patterned mainly by a photolithography method. In order to achieve the above object, in the manufacturing method in the present invention, an amount of undercut generated by difference in a degree of dissolution caused by developing solution is controlled, and baking is performed at a temperature such that glass in a protrusion formed at side edges becomes soft so as to touch a substrate by gravity. With such method for manufacturing, it becomes possible to make the side edges rounded whose curvature changes continuously.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: May 10, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideki Ashida, Junichi Hibino, Keisuke Sumida, Mitsuhiro Ohtani, Shinya Fujiwara, Hideki Marunaka, Tadashi Nakagawa
  • Patent number: 6879105
    Abstract: An electrode plate, a method of manufacturing the same, a gas discharge panel using an electrode plate, and a method of manufacturing the same are provided by incorporating a relatively simple structure, which can keep electrodes formed on a plate from peeling or becoming misaligned. In the electrode plate, at least one electrode is formed and adhered to a main surface of a plate by a thick film or thin film formation method, wherein of all ends of the electrode, at least an end opposite to an end at a power supply point is adhered to the main surface of the plate with stronger adhesion than the other parts of the electrode.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: April 12, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideaki Yasui, Kazuhiko Sugimoto, Keisuke Sumida, Hiroyoshi Tanaka, Shinya Fujiwara, Hideki Marunaka, Kazunori Hirao
  • Publication number: 20050073475
    Abstract: The present invention provides an image display device capable of displaying a good image by suppressing yellowing of a glass substrate, and a high-yield manufacturing method of the glass substrate. The image display device is formed of a front-side glass substrate and a back-side glass substrate. In this manufacturing method, a glass substrate is used as the front-side glass substrate when Sn++ content in the glass substrate is a predetermined value or less, and the glass substrate is used as the back-side glass substrate when the Sn++ content exceeds the predetermined value.
    Type: Application
    Filed: November 27, 2003
    Publication date: April 7, 2005
    Inventors: Daisuke Adachi, Hiroyasu Tsuji, Keisuke Sumida
  • Publication number: 20050062416
    Abstract: The present invention provides an image display device capable of displaying a good image by suppressing yellowing of a glass substrate, and an evaluating method of the glass substrate. The image display device is formed using the glass substrate where reflectance at wavelength of 220 nm is 5% or lower. In the evaluating method of the glass substrate for the image display device, Sn++ content in the glass substrate is analyzed using reflectance at wavelength of 220 nm.
    Type: Application
    Filed: November 27, 2003
    Publication date: March 24, 2005
    Inventors: Daisuke Adachi, Hiroyasu Tsuji, Keisuke Sumida
  • Patent number: 6869751
    Abstract: A manufacturing method for a metal electrode used for a bus electrode, a data electrode, and the like which make up a display panel including a PDP (Plasma Display Panel) by which, when these electrodes are patterned according to a photolithographic method, the edge curl phenomenon can be substantially controlled to the extent that the phenomenon is negligible. The manufacturing method of the invention therefore includes a dry step for drying the layers making up the metal electrode so that flows (F1, F2, and F3) of the solvent occur from a region having a high absorbency of the solvent to a region having a lower absorbency of the solvent.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: March 22, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hideki Asida, Shinya Fujiwara, Hideki Marunaka, Tadashi Nakagawa, Keisuke Sumida, Hideaki Yasui, Kazuhiko Sugimoto, Hiroyosi Tanaka
  • Publication number: 20050041001
    Abstract: A plasma display panel includes a first panel member in which a plurality of pairs of display electrodes are arranged so as to be adjacent to each other in a column direction and a second panel member in which a plurality of address electrodes are arranged so as to be adjacent to each other in a row direction, and the first panel member and the second panel member are opposed to each other so that a plurality of cells are formed in a matrix in areas where the plurality of pairs of display electrodes intersect with the plurality of address electrodes. The plasma display panel is characterized in that at least one of an average cell area, an average cell opening ratio and an average visible light transmittance efficiency is greater in a panel central region than in a panel peripheral region.
    Type: Application
    Filed: May 28, 2001
    Publication date: February 24, 2005
    Inventors: Keisuke Sumida, Hiroyuki Yonehara, Morio Fujitani, Hideki Asida
  • Patent number: 6857925
    Abstract: A manufacturing method for a plasma display panel applies phosphorous ink from a nozzle to channels between partition walls as the nozzle moves relative to the channels. The phosphorous ink is redispersed with a dispenser before being expelled from the nozzle. Subsequently, a second plate is placed on the partition walls and the first and second plates are sealed together with a gas medium between the two.
    Type: Grant
    Filed: October 18, 2002
    Date of Patent: February 22, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyuki Kawamura, Shigeo Suzuki, Masaki Aoki, Kanako Miyashita, Mitsuhiro Ohtani, Hiroyuki Kado, Keisuke Sumida, Nobuyuki Kirihara
  • Patent number: 6855196
    Abstract: An ink for a display panel effective in reducing the uneven adhesion of the ink is applied by an ink application apparatus using an inkjet method to form a structural layer (e.g. reflective layer, phosphor layer) of a display panel such as a plasma display panel. The ink is delivered through a nozzle of the ink application apparatus and includes a powder material used in forming the structural layer, water or a water-miscible solvent, a binder formed from a water-soluble resin, and a plasticizer. The flexibility retained by the ink, even after the ink is applied, allows for leveling of the applied ink to occur and uneven adhesion to be reduced as a result.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: February 15, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyuki Kawamura, Keisuke Sumida, Shigeo Suzuki
  • Publication number: 20040242113
    Abstract: A method of manufacturing a plasma display panel, whose glass substrate is not tinged and luminance is high, is provided, even when silver material is used. A layer including silver compounds, which include sulfur generated on a surface of an electrode by reacting on sulfur in air, is removed before a forming process of a dielectric layer. Then decomposition of the compound is restricted in a firing process of the dielectric layer. Even when the electrode having the silver material with high electrical conductivity is used, yellow coloration on the glass substrate is prevented. As a result, a high quality plasma display panel which does not decrease in luminance is provided.
    Type: Application
    Filed: January 30, 2004
    Publication date: December 2, 2004
    Inventors: Daisuke Adachi, Keisuke Sumida, Hideki Ashida, Morio Fujitani
  • Publication number: 20040239246
    Abstract: A plasma display panel includes a substrate on which a plurality of electrodes formed by sintering a conductive material are arranged. Each electrode has a first part that is positioned within a display area on the substrate, and a second part that is positioned outside the display area on the substrate and has a smaller film thickness than the first part.
    Type: Application
    Filed: July 19, 2004
    Publication date: December 2, 2004
    Inventors: Hideki Asida, Hiroyuki Yonehara, Keisuke Sumida, Morio Fujitani, Junichi Hibino, Shinya Fujiwara, Hideki Marunaka, Tadashi Nakagawa
  • Publication number: 20040232840
    Abstract: To provide a technique for relatively easily preventing yellowing of a PDP that uses silver electrodes, and a PDP utilizing the technique that is capable of displaying images with high luminance and high quality. To form the electrodes, an alloy composed of Ag as a main constituent and a transition metal (at least one selected from Cu, Cr, Co, Ni, Mn, and Fe) is used, or an oxide of such a transition metal is added. Alternatively, an alloy composed of Ag as a main constituent and a metal (at least one selected from Ru, Rh, Ir, Os, and Re) is used, or an oxide of such a metal is added. Alternatively, Ag particles whose surfaces are each coated with a metal (Pd, Cu, Cr, Ni, Ir, or Ru) or a metal oxide (SiO2, Al2O3, NiO, ZrO2, Fe2O3, ZnO, In2O3, CuO, TiO2, or Pr6O11) are used.
    Type: Application
    Filed: June 23, 2004
    Publication date: November 25, 2004
    Inventors: Masaki Aoki, Mitsuhiro Ohtani, Junichi Hibino, Keisuke Sumida, Hideki Asida, Shinya Fujiwara, Hideki Marunaka, Tadashi Nakagawa
  • Publication number: 20040219858
    Abstract: A manufacturing method for a gas discharge display panel includes a disposing step of disposing on a substrate, material of one of an electrode, a dielectric layer, a barrier rib, and a phosphor layer; and a baking step of baking the substrate on which the material has been disposed, while the substrate is carried on a support platform. The support platform has at least one channel in a surface thereof on which the substrate is placed, extending from a covered area covered by the substrate through to an exposed area not covered by the substrate.
    Type: Application
    Filed: June 7, 2004
    Publication date: November 4, 2004
    Inventors: Hiroyuki Yonehara, Masaki Aoki, Keisuke Sumida, Morio Fujitani, Hideki Asida
  • Publication number: 20040212305
    Abstract: A PDP has first and second substrates which face each other with a space in between. A display electrode pair and a dielectric layer are formed on the first substrate, and a plurality of discharge cells are formed between the first and second substrates along the display electrode pair. In this construction, two or more depressions are provided in the dielectric layer in an area corresponding to each discharge cell. This improves luminous intensity and illumination efficiency. Also, to form the dielectric layer on the first substrate, first a transfer film is made by providing a dielectric precursor layer on a support film, then depressions are formed in the dielectric precursor layer of the transfer film, and lastly the dielectric precursor layer of the transfer film is transferred onto the first substrate. This decreases the number of manufacturing steps and increases the yield, thereby reducing manufacturing costs.
    Type: Application
    Filed: June 1, 2004
    Publication date: October 28, 2004
    Inventors: Morio Fujitani, Hiroyuki Yonehara, Masaki Aoki, Keisuke Sumida, Hideki Asida, Junichi Hibino