Patents by Inventor Betty Boatman

Betty Boatman 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).

  • High-gain photodetectors made from NIPI mesas with selective lateral contacts
    Patent number: 4839714
    Abstract: A selective contact to a NIPI doping superlattice having a trap free (or low trap density) contact in contact with the layers of the superlattice. In a NIPI superlattice, the trap free region is a doped region that can be produced: by diffusion of dopant ions from a doped metal contact; by overdoping of the edges of the superlattice; or by overgrowth of the edges of the superlattice with a doped material that is trap free.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: June 13, 1989
    Assignee: Hewlett-Packard Company
    Inventors: Gottfried H. Doehler, Caroline J. Scott, Gary R. Trott, Betty Boatman