Patents Assigned to Asahi-Schwebel Co., Ltd.
  • Glass cloth and film substrate using the same
    Patent number: 7640951
    Abstract: Glass cloth which is formed of a warp yarn and a weft yarn of the same glass yarn, wherein a ratio of warp yarn width to weft yarn width is not less than 0.80 and not more than 1.20 and a ratio of an elongation rate in a length direction when a load in a range of 25 N to 100 N per 25 mm width of the glass cloth is added in a warp yarn direction, to an elongation rate in a width direction when said load is added in a weft yarn direction is not less than 0.80 and not more than 1.20.
    Type: Grant
    Filed: April 10, 2008
    Date of Patent: January 5, 2010
    Assignee: Asahi-Schwebel Co., Ltd.
    Inventors: Yoshinobu Fujimura, Yasuyuki Kimura
  • Glass cloth and printed wiring board
    Patent number: 7049253
    Abstract: The present invention is (1) a glass cloth composed of a group of warp yarns and a group of weft yarns wherein one of the group of the warp and weft yarns are arranged with substantially no gap between the yarns, and, in that group, a width A (?m) of a cross-section of the yarn arranged with substantially no gap, a single-fiber diameter L (?m) of the yarn, the number N of single-fibers constituting the yarn and a weaving density C (ends/25 mm) of the glass cloth composed of the yarns satisfy the following equation (1-a): C×A/(25×L×N)?1.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: May 23, 2006
    Assignee: Asahi-Schwebel Co., Ltd.
    Inventors: Yasuyuki Kimura, Yoshinori Gondoh, Yoshinobu Fujimura