Patents by Inventor Howard F. Rhodes

Howard F. Rhodes 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).

  • Twin p-well CMOS imager
    Patent number: 7538372
    Abstract: A CMOS imager which includes a substrate voltage pump to bias a doped area of a substrate to prevent leakage into the substrate from the transistors formed in the doped area. The invention also provides a CMOS imager where a photodetector sensor array is formed in a first p-well and readout logic is formed in a second p-well. The first p-well can be selectively doped to optimize cross-talk, collection efficiency and transistor leakage, thereby improving the quantum efficiency of the sensor array while the second p-well can be selectively doped and/or biased to improve the speed and drive of the readout circuitry.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: May 26, 2009
    Assignee: Micron Technology, Inc.
    Inventor: Howard F. Rhodes
  • Twin p-well CMOS imager
    Publication number: 20030169360
    Abstract: A CMOS imager which includes a substrate voltage pump to bias a doped area of a substrate to prevent leakage into the substrate from the transistors formed in the doped area. The invention also provides a CMOS imager where a photodetector sensor array is formed in a first p-well and readout logic is formed in a second p-well. The first p-well can be selectively doped to optimize cross-talk, collection efficiency and transistor leakage, thereby improving the quantum efficiency of the sensor array while the second p-well can be selectively doped and/or biased to improve the speed and drive of the readout circuitry.
    Type: Application
    Filed: April 4, 2003
    Publication date: September 11, 2003
    Inventor: Howard F. Rhodes