Patents Assigned to Bruker AX, Inc.
  • Patent number: 6254806
    Abstract: A phosphor is provided that has a host material that is doped with a dopant having the chemical structure XCl3, where X is a rare earth element or combination of elements. A free oxygen contributor is also added to provide the free oxygen necessary to activate the rare earth dopant. The processing of the phosphor includes the heating of the phosphor in an over pressure environment of zinc, cadmium or tellurium. The heating is done in a two-temperature zone enclosed environment, so that impurities in the phosphor powder are condensed out on the cooler surface. Altematively, the dopant may be a material that does not include a rare earth element, such as copper, tellurium, cadmium, silver, potassium, manganese, magnesium, calcium, strontium, and barium.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: July 3, 2001
    Assignee: Bruker AX, Inc.
    Inventors: Vello Valdna, Roger D. Durst