Patents by Inventor Evan W. Wang

Evan W. Wang 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).

  • Publication number: 20240019358
    Abstract: In certain examples, the present disclosure may involve use of filtering optics to provide a set of filter-separated light beams respectively associated with different polarization states of polarized light directed towards a sample, and providing a set of sample¬characterizing response data based on factors such as sets of polarization-state values, different wavelengths associated with the polarization states, and/or light-incidence angles characterizing separation of the different polarization states. More specific examples may include computing a Mueller matrix across an entire image, with the image being captured in a single shot in response to using filtering optics (e.g., metasurface polarization filtering to provide the set of filter-separated light beams). In another related example, sets of polarization-state values, corresponding Stokes vectors, may be used.
    Type: Application
    Filed: October 29, 2021
    Publication date: January 18, 2024
    Inventors: Jonathan A. Fan, Evan W. Wang, Thaibao Phan
  • Publication number: 20240003819
    Abstract: Certain examples are directed to methods for detection of anomalies in semiconductor thin-film materials, such as strains, defects and the like, that may precipitate defects in semiconductor processing steps and may adversely impact device and system-level functionality, processing, and yields. Certain methods use filtering optics to provide a set of filter-separated light beams respectively associated with different polarization states of polarized light directed towards a semiconductor-related material sample, and providing a set of sample-characterizing response data based on factors such as sets of polarization-state values, different wavelengths associated with the polarization states, and/or light-incidence angles characterizing separation of the different polarization states. Based on these factors, the types and severities of such anomalies may be analyzed and the related defects remedied.
    Type: Application
    Filed: October 29, 2021
    Publication date: January 4, 2024
    Inventors: Thaibao Phan, Evan W. Wang, Jonathan A. Fan