Patents by Inventor Leonhard Senn

Leonhard Senn 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).

  • Apparatus for producing a protective coating on substrates
    Patent number: 5405448
    Abstract: A method and apparatus for applying a protective coating onto a substrate comprises a power supply for generating an amplitude-modulated alternating electromagnetic field in a vacuum chamber. A silicon-organic compound is supplied in a gaseous state into the vacuum chamber and is plasma polymerized onto the substrate in the chamber without powdery portions. Another process parameter for controlling coating rate is adjusted to be at a high level so that when the amplitude modulation is stopped, powdery portions do appear in the coating. Thus at high coating rates amplitude-modulation according to the invention avoids such powdery portions.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: April 11, 1995
    Assignee: Balzers Aktiengesellschaft
    Inventors: Stephen Jost, Leonhard Senn
  • Protective coating on substrates
    Patent number: 5298290
    Abstract: A method and apparatus for applying a protective coating onto a substrate comprises a power supply for generating an amplitude-modulated alternating electromagnetic field in a vacuum chamber. A silicon-organic compound is supplied in a gaseous state into the vacuum chamber and is plasma polymerized onto the substrate in the chamber without powdery portions. Another process parameter for controlling coating rate is adjusted to be at a high level so that when the amplitude modulation is stopped, powdery portions do appear in the coating. Thus at high coating rates amplitude-modulation according to the invention avoids such powdery portions.
    Type: Grant
    Filed: September 18, 1992
    Date of Patent: March 29, 1994
    Assignee: Balzers Aktiengesellschaft
    Inventors: Stephen Jost, Leonhard Senn