Patents by Inventor Robert E. Caldwell

Robert E. Caldwell 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 for manufacturing a semiconductor structure having reduced lateral spacing between buried regions
    Patent number: 4373252
    Abstract: The lateral spacing between buried regions separated by oxide-isolation regions in a semiconductor structure is reduced to as little as one micron by performing a deep implantation of ions of the conductivity type opposite to that of the buried regions generally into portions of the substrate below the sites where the oxide-isolation regions are formed.
    Type: Grant
    Filed: February 17, 1981
    Date of Patent: February 15, 1983
    Assignee: Fairchild Camera & Instrument
    Inventor: Robert E. Caldwell
  • Method for forming shaped buried layers in semiconductor devices utilizing etching, epitaxial deposition and oxide formation
    Patent number: 4251300
    Abstract: A method for forming a shaped buried layer in a semiconductor structure includes the steps of removing a portion of semiconductor material from adjacent the surface of the semiconductor substrate to form an indentation, introducing a dopant into the surface of the indentation to form regions of impurity in the semiconductor substrate, forming a region of epitaxial material on the surface of the indentation, and forming regions of insulating material to surround the epitaxial material.
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: February 17, 1981
    Assignee: Fairchild Camera and Instrument Corporation
    Inventor: Robert E. Caldwell