Patents by Inventor Gerard Van der Leeden

Gerard Van der Leeden 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).

  • In-situ growth of flourounated superconducting, Y-Ba-Cu-O thin films on sapphire substrates with a buffer layer by laser ablation
    Patent number: 5198414
    Abstract: A laser ablation method for forming a fluorinated superconducting Y-Ba-Cu-O thin film on a sapphire substrate is disclosed, which comprises the steps of: (1) depositing a barrier layer of BaAl.sub.2 O.sub.4 on the sapphire substrate; (2) placing the coated substrate and a tagret in a deposition chamber, said target including fluorine, barium, yttrium, copper and oxygen; (3) providing a background atmosphere including at least partial pressure of O.sub.2 within the chamber; (4) heating the coated substrate to a temperature above ambient; (5) laser-ablating the target material onto the heated substrate while controlling the partial pressure of O.sub.2 in said background atmosphere and the temperature of said heated substrate so that the as-deposited thin film on said substrate is superconductive.
    Type: Grant
    Filed: October 1, 1991
    Date of Patent: March 30, 1993
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Stanford R. Ovshinsky, Rosa Young, Gerard Van der Leeden, Benjamin S. Chao