Patents by Inventor Cheng-Ming Yi

Cheng-Ming Yi 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 apparatus of performing an erase operation on a memory integrated circuit
    Patent number: 8508993
    Abstract: Various discussed approaches improve the over erase issue and the coupling effect, and include (A) multilevel contacts between (i) the first outer selected word line of an erase group, and (ii) the first unselected word line outside the ease group neighboring the first outer selected word line; (B) a sufficient separation distance between (i) the first outer selected word line of an erase group, and (ii) the first unselected word line outside the ease group neighboring the first outer selected word line. These are examples of electrically isolating (i) the first outer selected word line of an erase group, from (ii) the first unselected word line outside the ease group neighboring the first outer selected word line.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: August 13, 2013
    Assignee: Macronix International Co., Ltd.
    Inventors: Yi-Fan Chang, Su-chueh Lo, Cheng-Ming Yi, Ta Kang Chu, Chu Ching Wu, Kuo Yu Liao, Ken Hui Chen, Kuen Long Chang, Chun Hsiung Hung