Patents by Inventor Sven A. Roosild

Sven A. Roosild 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 and means for passivation and isolation in semiconductor devices
    Patent number: 4017887
    Abstract: The use of ion implantation to produce low concentrations of chromium, oxygen or iron in a gallium arsenide junction type semiconductor, utilizing the accompanying low resistivity to provide an improved device.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: April 12, 1977
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: D. Eirug Davies, Sven A. Roosild, Russell P. Dolan, Jr.
  • Phase compensated zone plate photodetector
    Patent number: 4016416
    Abstract: A radiation transparent base having a number of coincentric Fresnel rings mounted on one face, and one-quarter wavelength in thickness and a reflective coating covering the face and rings and a detector mounted on the opposite face to collect reflected in phase radiation.
    Type: Grant
    Filed: March 23, 1976
    Date of Patent: April 5, 1977
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Freeman D. Shepherd, Jr., Sven A. Roosild
  • Low beam velocity retina for Schottky infrared vidicons
    Patent number: 4005327
    Abstract: A solid state sensing retina for infrared vidicon television camera tubes using a low voltage electron beam, consisting of a monolithic silicon wafer having an n-type substrate and two dimensional array of p-type islands, each island has a Schottky electrode photoemitter and substrate contact buss, an ohmic contact pad allows charging of the p-type region beneath the Schottky electrode.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: January 25, 1977
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Sven A. Roosild, Freeman D. Shepherd, Jr., Andrew C. Yang
  • Buried junction enhanced Schottky barrier device
    Patent number: H134
    Abstract: A Schottky barrier device having a completely submersed Schottky barrier junction to enhance the collection efficiency of photogenerated carriers. A method is also disclosed for manufacturing the device.
    Type: Grant
    Filed: August 22, 1984
    Date of Patent: September 2, 1986
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Lyn H. Skolnik, Sven A. Roosild, Freeman D. Shepherd, Jr.