Patents by Inventor Juha Viljanen

Juha Viljanen 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).

  • Method of growing a ZnS:Mn phosphor layer for use in thin-film electroluminescent components
    Patent number: 6113977
    Abstract: The invention relates to a method of growing a ZnS:Mn phosphor layer suitable for use in thin-film electroluminescent components. According to the method, the ZnS:Mn phosphor layer is grown on a substrate by means of the ALE method using volatile zinc, sulfur and manganese compounds as the precursors. According to the invention, an organozinc compound such as diethylzinc or dimethylzinc is used as precursor for zinc, hydrogen sulfide or an organosulfur compound is used as precursor for sulfur, and an organomanganese compound or organic manganese complex compound is used as precursor for manganese. The invention provides a display component with drive-voltage-symmetrical light emission and stable characteristics of luminance level and turn-on voltage.
    Type: Grant
    Filed: September 11, 1997
    Date of Patent: September 5, 2000
    Assignee: Planar International Oy Ltd.
    Inventors: Erkki Lauri Soininen, Gitte Harkonen, Marja Lahonen, Runar Tornqvist, Juha Viljanen