Patents by Inventor Dimitrius Theodorou

Dimitrius Theodorou 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).

  • Semiconductor device for optical dosage measurement
    Patent number: 4385309
    Abstract: A semiconductor for the measurement of optical radiation dosage comprising a semiconductor body having a doped surface layer on a doped substrate, the surface layer having a conductivity appreciably higher than the substrate thereby to form at the transition a potential barrier with a space charge region whereat carrier pairs are produced with the incidence of optical radiation, where various parameters of the surface layer and the substrate are so selected that the conductivity due to stored photoconductivity varies according to a chosen characteristic law with change in optical radiation dosage, and electrodes applied to the surface layer are connected in a measuring circuit to measure the stored photoconductivity.
    Type: Grant
    Filed: July 25, 1980
    Date of Patent: May 24, 1983
    Assignee: Max-Planck-Gesellschaft zur Forderung der Wissenschaften E.V.
    Inventors: Hans-Joachim Queisser, Dimitrius Theodorou