Patents Assigned to Piezo Crystal Company, Division of PPA Industries, Inc.
  • Crystal header package
    Patent number: 4985655
    Abstract: A crystal header package with a sapphire bottom plate and a method of making same. The package has a low profile design consisting of two components defining a cover and a platform that are joined together by cold welding. A KOVAR washer is used within a seal between the sapphire bottom plate and the platform.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: January 15, 1991
    Assignee: Piezo Crystal Company, Division of PPA Industries, Inc.
    Inventors: Charles J. Jensik, William P. Hanson