Patents by Inventor Cheal-Seong Hwang

Cheal-Seong Hwang 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).

  • Patent number: 5918118
    Abstract: A method for forming a dynamic random access memory device includes the step of forming a memory cell access transistor on a semiconductor substrate wherein the memory cell access transistor includes a source/drain region at a surface of the semiconductor substrate. An insulating layer is formed on the semiconductor substrate and on the memory cell access transistor wherein the insulating layer has a contact hole therein exposing a portion of the source/drain region of the substrate. A first conductive layer is chemical vapor deposited on the exposed portion of the source/drain region of the substrate, and a second conductive layer is physical vapor deposited on the first conductive layer opposite the substrate. A dielectric layer is formed on the second conductive layer opposite the substrate, and a third conductive layer is formed on the dielectric layer opposite the substrate.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: June 29, 1999
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-Won Kim, Cheal-Seong Hwang, Sang-In Lee