Patents by Inventor Hsiang-Pan Li

Hsiang-Pan Li 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).

  • Resistance drift recovery method for MLC PCM
    Patent number: 9558823
    Abstract: A method is provided for operating a memory device including an array of memory cells including programmable resistive memory elements. Memory cells in the array are programmed to store data by applying program pulses to the memory cells to establish resistance levels within a number N of specified ranges of resistance, where each of the specified ranges corresponds to a particular data value. A drift recovery process is executed to the memory cells, including applying a recovery pulse having a pulse shape to a set of programmed memory cells, where memory cells in the set have resistance levels within two or more of the specified resistance ranges.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: January 31, 2017
    Assignee: Macronix International Co., Ltd.
    Inventors: Win-San Khwa, Tzu-Hsiang Su, Chao-I Wu, Hsiang-Pan Li, Meng-Fan Chang