Patents by Inventor Joannie Marks

Joannie Marks 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).

  • Thin film resistor for optoelectronic integrated circuits
    Patent number: 5960014
    Abstract: A thin film resistor for optoelectronic integrated circuits is described. A stable low resistance, thin film resistor comprising a bilayer of platinum on titanium is provided. Advantageously, the resistive layer is protected by a layer of dielectric, e.g. silicon dioxide or silicon nitride to reduce degradation from humidity an under high temperature operation at 300.degree. C. or more. The resistor may be formed on various substrates, including silicon dioxide, silicon nitride and semiconductor substrates. Applications for optoelectronic integrated circuits include integrated resistive heaters for wavelength fine tuning of a semiconductor laser array.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: September 28, 1999
    Assignee: Northern Telecom Limited
    Inventors: Guo Ping Li, Agnes Margittai, Trevor Jones, Joannie Marks, Frank R. Shepherd