Patents by Inventor Sidney Ivor Joseph Ingrey

Sidney Ivor Joseph Ingrey 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).

  • Gaseous plasma etching of aluminum and aluminum oxide
    Patent number: 4030967
    Abstract: Gaseous plasma etching of aluminum with conventional plasma etch gases has not hitherto been commercially possible due to a layer of aluminum oxide (Al.sub.2 O.sub.3) which forms on freshly prepared aluminum surfaces. By first plasma etching in the presence of a gaseous trihalide, preferably in a so-called "pancake" or radial-flow type reactor, the oxide layer is removed. Aluminum etching can then continue, either with or without plasma conditions, depending upon the etch gas used.
    Type: Grant
    Filed: August 16, 1976
    Date of Patent: June 21, 1977
    Assignee: Northern Telecom Limited
    Inventors: Sidney Ivor Joseph Ingrey, Heinz Josef Nentwich, Robert Gordon Poulsen
  • Sputtered dielectric thin films
    Patent number: 3962062
    Abstract: Sputtered thin films, particularly of tantalum and niobium, are prepared having predetermined optical and dielectric properties by controlling the flow rate of O.sub.2 in relation to the flow rate of N.sub.2. By controllably varying the ratio, differing characteristics can be obtained. Thus a stepwise or a continuous variation in refractive index can be obtained. Films show low optical losses and birefringent properties, and are particularly suitable for optical waveguides, capacitors and filters.
    Type: Grant
    Filed: December 9, 1974
    Date of Patent: June 8, 1976
    Assignee: Northern Electric Company Limited
    Inventor: Sidney Ivor Joseph Ingrey