Patents by Inventor William T. Liggett

William T. Liggett 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).

  • Patent number: 4836861
    Abstract: A point contact solar cell structure and method of manufacturing which provides metal contact from positive and negative bus bars to alternating n-wells and p-wells in a solar cell crystal. The solar cell spans two side-by-side metal bus bars. On the bottom surface of the cell crystal two side-by-side perforated metal layers contact wells of only one conductivity type. Holes in the perforated metal layers are located beneath wells of the opposite conductivity type. An insulated junction between the two perforated metal layers is located directly above the junction between the two side-by-side metal bus bars. Fingers from the perforated metal layer above one bus bar reach across and down to contact the opposite bus bar. Metal lines also reach from the bus bars up through the holes in the perforated contact layers and contact wells within the crystal. This way, all n-wells and p-wells have electrical contact to their respective bus bars.
    Type: Grant
    Filed: April 11, 1988
    Date of Patent: June 6, 1989
    Assignee: Tactical Fabs, Inc.
    Inventors: Douglas L. Peltzer, Richard L. Bechtel, Wen C. Ko, William T. Liggett