Patents by Inventor Tanja Claasen

Tanja Claasen 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).

  • Patent number: 7691757
    Abstract: Methods are provided for pulsed chemical vapor deposition (CVD) of complex nitrides, such as ternary metal nitrides. Pulses of metal halide precursors are separated from one another and nitrogen-containing precursor is provided during the metal halide precursor pulses as well as between the metal halide precursor pulses. Two different metal halide precursors can be provided in simultaneous pulses, alternatingly, or in a variety of sequences. The nitrogen-containing precursor, such as ammonia, can be provided in pulses simultaneously with the metal halide precursors and between the metal halide precursors, or continuously throughout the deposition. Temperatures can be kept between about 300° C. and about 700° C.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: April 6, 2010
    Assignee: ASM International N.V.
    Inventors: Suvi P. Haukka, Tanja Claasen, Peter Zagwijn
  • Publication number: 20080003838
    Abstract: Methods are provided for pulsed chemical vapor deposition (CVD) of complex nitrides, such as ternary metal nitrides. Pulses of metal halide precursors are separated from one another and nitrogen-containing precursor is provided during the metal halide precursor pulses as well as between the metal halide precursor pulses. Two different metal halide precursors can be provided in simultaneous pulses, alternatingly, or in a variety of sequences. The nitrogen-containing precursor, such as ammonia, can be provided in pulses simultaneously with the metal halide precursors and between the metal halide precursors, or continuously throughout the deposition. Temperatures can be kept between about 300° C. and about 700° C.
    Type: Application
    Filed: June 21, 2007
    Publication date: January 3, 2008
    Applicant: ASM INTERNATIONAL N.V.
    Inventors: Suvi Haukka, Tanja Claasen, Peter Zagwijn