Patents by Inventor Peter P. Kwan

Peter P. Kwan 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).

  • Protection means for ridge waveguide laser structures using thick organic films
    Patent number: 5307357
    Abstract: What is disclosed is a semiconductor ridge waveguide laser structure having mechanical protection of ridge element by means of a thick, multi-layer organic material. The organic material, which may be a polyimide film, is deposited over the ridge element. The present invention also provides a fabrication process for depositing the protective means on the ridge element including deposition and photolithographic steps.
    Type: Grant
    Filed: November 5, 1992
    Date of Patent: April 26, 1994
    Assignee: International Business Machines Corporation
    Inventors: Mark E. Jost, Ranee W. Kwong, Abbas Behfar-Rad, Peter P. Kwan