Patents by Inventor Masafumi Okawa

Masafumi Okawa 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).

  • Publication number: 20050151476
    Abstract: A highly reliable plasma display panel with less difference in wiring resistance, which can be driven at high speed even though the front or rear board has multilayer electrode wiring. Data electrode (9) is covered with dielectric layer (15), and priming electrode (14) is provided on dielectric layer (15). External wiring lead-out (19) of data electrode (9) is provided on rear substrate (200), and external wiring lead-out (18) of priming electrode (14) is provided on dielectric layer (15). Wiring lead-out (19) and wiring lead-out (18) have step (20) equivalent to the thickness of dielectric layer (15).
    Type: Application
    Filed: February 18, 2004
    Publication date: July 14, 2005
    Inventors: Hiroyuki Tachibana, Naoki Kosugi, Masafumi Okawa, Ryuichi Murai
  • Patent number: 6913501
    Abstract: The present invention has as its objective to provide a display panel with silver electrodes without yellowing, and a method of producing such a display panel. After patterning and applying silver paste to form display electrodes on a substrate, glass paste is applied to form the dielectric layer, covering the electrodes, and both layers are simultaneously baked. Glass frit contained in the silver paste is chosen to have a lower softening point than die glass contained in the glass paste, and the baking process is divided into a first step, in which the baking temperature is equal to or higher than the softening point of the glass frit but lower than the softening point of the glass, and a second step, in which the baking temperature is higher than the softening point of the glass. This process allows a display panel to be produced with fewer bakings and reduced yellowing.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: July 5, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junichi Hibino, Yoshiki Sasaki, Katsuyosi Yamashita, Masafumi Okawa, Yasuo Takeuchi, Mitsuhiro Otani
  • Publication number: 20030201717
    Abstract: The present invention has as its objective to provide a display panel with silver electrodes without yellowing, and a method of production such a display panel.
    Type: Application
    Filed: April 25, 2003
    Publication date: October 30, 2003
    Inventors: Junichi Hibino, Yoshiki Sasaki, Katsuyosi Yamashita, Masafumi Okawa, Yasuo Takeuchi, Mitsuhiro Otani
  • Patent number: 6614184
    Abstract: The present invention has as its objective to provide a display panel with silver electrodes without yellowing, and a method of production such a display panel. After patterning and applying silver paste to form display electrodes on the substrate, glass paste is applied to form the dielectric layer, covering the electrodes, and both layers are simultaneously baked. Glass flit contained in the silver paste is chosen to have a lower softening point than the glass contained in the glass paste, and the baking process is divided into a first step, in which the baking temperature is equal to or higher than the softening point of the glass flit but lower than the softening point of the glass, and a second step, in which the baking temperature is higher than the softening point of the glass. This process allows a display panel to be produced with fewer bakings and reduced yellowing.
    Type: Grant
    Filed: April 2, 2001
    Date of Patent: September 2, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd
    Inventors: Junichi Hibino, Yoshiki Sasaki, Katsuyosi Yamashita, Masafumi Okawa, Yasuo Takeuchi, Mitsuhiro Otani
  • Publication number: 20030071572
    Abstract: The present invention has as its objective to provide a display panel with silver electrodes without yellowing, and a method of production such a display panel.
    Type: Application
    Filed: April 2, 2001
    Publication date: April 17, 2003
    Inventors: Junichi Hibino, Yoshiki Sasaki, Katsuyosi Yamashita, Masafumi Okawa, Yasuo Takeuchi, Mitsuhiro Otani