Patents Assigned to Littlefuse Ireland Development Company Limited
  • Integrated passive device and method for producing such a device
    Patent number: 6700772
    Abstract: An IPD has a varistor of electrodes and a ZnO dielectric. A capacitor includes electrodes and a dielectric that has oxides of bismuth, magnesium, and niobium having a pyrochlore structure of type A2B2O7. The materials are applied as wet layers and are sintered for integrated production.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: March 2, 2004
    Assignee: Littlefuse Ireland Development Company Limited
    Inventors: Ramesh Raghavendra, Clive A. Randall, Amanda L. Baker, Neil McLoughlin
  • Thermally protected metal oxide varistor
    Patent number: 6636403
    Abstract: A varistor has a thermal fuse between a lead and an electrode. The fuse includes a link extending between the surface of an insulator and the fused electrode. The electrical connection of the link and the electrode is maintained by a low temperature solder fillet. That part of the link between the electrode and the insulator is surrounded by hot melt electrically insulating material. Upon sustained over-voltage conditions, the link and the solder fillet melt, and an insulating gap is rapidly created by molten hot melt material.
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: October 21, 2003
    Assignee: Littlefuse Ireland Development Company Limited
    Inventors: Neil A. McLoughlin, Michael O'Donovan