Patents by Inventor Anco Heringa

Anco Heringa 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).

  • Method of producing a schottky varicap
    Patent number: 6387769
    Abstract: A method of producing a Schottky varicap (25) including: (a) providing an epitaxial layer (12) on a semiconductor substrate (1); (b) providing an insulating layer including an oxide layer and a nitride layer on a predetermined area of the surface of the epitaxial layer (12); (c) depositing a polysilicon layer (6); (d) applying a first high temperature step to diffuse a guard ring (10) around the first predetermined area; (e) removing a predetermined portion of the polysilicon layer (6) to expose the first silicon nitride film (5); (f) implanting atoms through at least the first oxide film (4) to provide a predetermined varicap doping profile; (g) applying a second high temperature step to anneal and activate the varicap doping profile; (h) removing the first oxide film (4) to provide an exposed area; (i) providing a Schottky electrode (17) on the exposed area.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: May 14, 2002
    Assignee: U.S. Philips Corporation
    Inventors: Ronald Dekker, Henricus Godefridus Rafael Maas, Anco Heringa, Holger Schligtenhorst
  • Method of producing a schottky varicap
    Publication number: 20010031538
    Abstract: A method of producing a Schottky varicap (25) including:
    Type: Application
    Filed: March 1, 2001
    Publication date: October 18, 2001
    Inventors: Ronald Dekker, Henricus Godefridus Rafael Maas, Anco Heringa, Holger Schligtenhorst