Patents by Inventor Hendrik Armand Denis Claes

Hendrik Armand Denis Claes 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).

  • Manufacturing semiconductor devices in which silicon slices or germanium slices are etched and semiconductor devices thus manufactured
    Patent number: 3966517
    Abstract: Thinning plate-shaped bodies of silicon or germanium, adhered to a glass-plate by chemically etching in an etchant comprising hydrofluoric acid and at least one oxidant, in which, prior to said etching, the etchant is given a content of silicon. This silicon may be added in several forms, for instance as silicon oxide in readily accessible form or by dissolving some elemental silicon. It is further possible for a similar process to use an etchant comprising the above etchant after first use. The method may be used in the manufacture of semiconductor devices.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: June 29, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Hendrik Armand Denis Claes, Wolter Geppienus Gelling