Patents by Inventor David W. Bigelow

David W. Bigelow 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).

  • Reduced crosstalk CMOS image sensors
    Patent number: 7592654
    Abstract: CMOS image sensor having high sensitivity and low crosstalk, particularly at far-red to infrared wavelengths, and a method for fabricating a CMOS image sensor. A CMOS image sensor has a substrate, an epitaxial layer above the substrate, and a plurality of pixels extending into the epitaxial layer for receiving light. The image sensor also includes at least one of a horizontal barrier layer between the substrate and the epitaxial layer for preventing carriers generated in the substrate from moving to the epitaxial layer, and a plurality of lateral barrier layers between adjacent ones of the plurality of pixels for preventing lateral diffusion of electrons in the epitaxial layer.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: September 22, 2009
    Assignee: Aptina Imaging Corporation
    Inventors: Sandeep R. Bahl, Fredrick P. LaMaster, David W. Bigelow
  • Reduced crosstalk CMOS image sensors
    Patent number: 7307327
    Abstract: CMOS image sensor having high sensitivity and low crosstalk, particularly at far-red to infrared wavelengths, and a method for fabricating a CMOS image sensor. A CMOS image sensor has a substrate, an epitaxial layer above the substrate, and a plurality of pixels extending into the epitaxial layer for receiving light. The image sensor also includes at least one of a horizontal barrier layer between the substrate and the epitaxial layer for preventing carriers generated in the substrate from moving to the epitaxial layer, and a plurality of lateral barrier layers between adjacent ones of the plurality of pixels for preventing lateral diffusion of electrons in the epitaxial layer.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: December 11, 2007
    Assignee: Micron Technology, Inc.
    Inventors: Sandeep R. Bahl, Frederick P. LaMaster, David W. Bigelow