Patents by Inventor DAGOBERT MICHAEL DE LEEUW

DAGOBERT MICHAEL DE LEEUW 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).

  • II-VI based light emitting semiconductor device
    Patent number: 9385264
    Abstract: The invention provides a light emitting semi conductor device comprising a zinc magnesium oxide based layer as active layer, wherein the zinc magnesium oxide based layer comprises an aluminum doped zinc magnesium oxide layer having the nominal composition Zn-xMgxO with 1-350 ppm Al, wherein x is in the range of 0<x?0.3. The invention further provides a method for the production of such aluminum doped zinc magnesium oxide, the method comprising heat treating a composition comprising Zn, Mg and Al with a predetermined composition at elevated temperatures, and subsequently annealing the heat treated composition to provide said aluminum doped zinc magnesium oxide.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: July 5, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Kamal Asadi, Dagobert Michael De Leeuw, Johannes Franciscus Maria Cillessen, Wilhelmus Cornelis Keur, Frank Verbakel, Patrick John Baesjou, Cornelis Eustatius Timmering
  • II-VI BASED LIGHT EMITTING SEMICONDUCTOR DEVICE
    Publication number: 20150340559
    Abstract: The invention provides a light emitting semi conductor device comprising a zinc magnesium oxide based layer as active layer, wherein the zinc magnesium oxide based layer comprises an aluminum doped zinc magnesium oxide layer having the nominal composition Zn-xMgxO with 1-350 ppm Al, wherein x is in the range of 0<x?0.3. The invention further provides a method for the production of such aluminum doped zinc magnesium oxide, the method comprising heat treating a composition comprising Zn, Mg and Al with a predetermined composition at elevated temperatures, and subsequently annealing the heat treated composition to provide said aluminum doped zinc magnesium oxide.
    Type: Application
    Filed: June 28, 2013
    Publication date: November 26, 2015
    Inventors: KAMAL ASADI, DAGOBERT MICHAEL DE LEEUW, JOHANNES FRANCISCUS MARIA CILLESSEN, WILHELMUS CORNELIS KEUR, FRANK VERBAKEL, PATRICK JOHN BAESJOU, CORNELIS EUSTATIUS TIMMERING