Patents by Inventor Jae-chul Ryu

Jae-chul Ryu 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).

  • Multi-layered circuit substrate and manufacturing method thereof
    Patent number: 5747222
    Abstract: A multi-layered circuit substrate and a manufacturing method thereof comprising the steps of coating the upper surface of a substrate with a photosensitive insulating layer; exposing and developing the photosensitive insulating layer to form a photosensitive insulating layer of predetermined pattern and pattern spaces; forming a conductive layer by printing a conductive ink in the pattern spaces; and forming a plurality of layers by performing the previous steps, each layer comprising a photosensitive insulating layer of predetermined pattern and pattern spaces and a conductive layer formed in the pattern spaces.
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: May 5, 1998
    Assignee: Samsung Aerospace Industries, Ltd.
    Inventor: Jae-chul Ryu