Patents by Inventor Leonard Wan

Leonard Wan 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 fabricating sub-micron hemispherical and hemicylidrical structures from non-spherically shaped templates
    Patent number: 6969472
    Abstract: A method for manufacturing hemi-cylindrical and hemi-spherical micro structures is provided. A pattern is formed onto a substrate, and a layer of material is subsequently grown onto the substrate. Due to growth characteristics, the layer will form radially symmetric features when grown to an appropriate thickness.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: November 29, 2005
    Assignee: LSI Logic Corporation
    Inventors: Dmitri V. Vezenov, John M. Guerra, Leonard Wan, Paul F. Sullivan
  • Method of fabricating sub-micron hemispherical and hemicylidrical structures from non-spherically shaped templates
    Publication number: 20020168592
    Abstract: A method for manufacturing hemi-cylindrical and hemi-spherical micro structures is provided. A pattern is formed onto a substrate, and a layer of material is subsequently grown onto the substrate. Due to growth characteristics, the layer will form radially symmetric features when grown to an appropriate thickness.
    Type: Application
    Filed: April 25, 2001
    Publication date: November 14, 2002
    Inventors: Dmitri V. Vezenov, John M. Guerra, Leonard Wan, Paul F. Sullivan
  • Optical storage medium with virtual track pitch
    Publication number: 20020154590
    Abstract: An optical data storage medium includes a superstructure of micro-lenses defining first and second repeating periods. One of the periods is longer than the other, and the presence of the longer repeating period allows the medium to be used in an optical drive that is configured to use light diffracted by the longer period for tracking purposes. The micro-lenses may be configured such that adjacent lenses have different heights, widths, or shapes. In some embodiments, the spacing between adjacent data tracks is varied to provide the first and second repeating periods.
    Type: Application
    Filed: April 25, 2001
    Publication date: October 24, 2002
    Inventors: Dmitri V. Vezenov, John M. Guerra, Leonard Wan, Paul F. Sullivan, Kenric P. Nelson