Patents by Inventor Manfred Hermann Bettini

Manfred Hermann Bettini 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).

  • Etching of III-V semiconductor materials with H.sub.2 S in the preparation of heterodiodes to facilitate the deposition of cadmium sulfide
    Patent number: 4039357
    Abstract: A hydrogen transport process for cleaning the surface of an indium or gallium based semiconductor material and for depositing n-type cadmium sulfide on the cleaned semiconductor material is disclosed. The cleaning and deposition can be accomplished in sequence or simultaneously. The process entails adding hydrogen sulfide to a hydrogen gas flow in a chemical vapor deposition process. Single crystalline photovoltaic cells of p-InP/n-CdS with a 13.5% efficiency have been reproducibly fabricated. An efficiency of 4.6% has been obtained with a thin layer polycrystalline p-InP/n-CdS cell. Additionally, a p-GaAs/n-CdS heterodiode cell has been produced.
    Type: Grant
    Filed: August 27, 1976
    Date of Patent: August 2, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Klaus Jurgen Bachmann, Manfred Hermann Bettini, Ernest Buehler, Joseph Leo Shay, Sigurd Wagner