Patents by Inventor Joon-yong Choi

Joon-yong Choi 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).

  • Phase change memory devices and program methods
    Publication number: 20070230239
    Abstract: A phase change memory device is disclosed. It includes a memory cell array including a plurality of memory cells programmed in relation to a phase change material, and a write driver circuit configured to provide a set current and a reset current to a selected memory cell. The write driver circuit includes a set current driver configured to provide the set current and a reset current driver configured to provide the reset current.
    Type: Application
    Filed: March 19, 2007
    Publication date: October 4, 2007
    Inventors: Byung-Gil Choi, Du-Eung Kim, Yu-Hwan Ro, Joon-Yong Choi, Beak-Hyung Cho, Woo-Yeong Cho