Patents by Inventor Jian Shing Liu

Jian Shing Liu 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: 10459836
    Abstract: A memory device and associated control method are provided. The memory device includes a memory array and a control circuit, which are electrically connected with each other. The memory array includes a plurality of memory groups. A first memory group among the plurality of memory groups includes at least one first memory unit. The control circuit executes the control method including following steps. Firstly, a first timestamp corresponding to a first time point is recorded when one of the at least one first memory unit is programmed. Then, state of the first memory group is identified based on the first timestamp and an identification rule, and the first memory group is retired when a condition being predefined in the identification rule is satisfied.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: October 29, 2019
    Assignee: MACRONIX INTERNATIONAL CO., LTD.
    Inventors: Chia-He Liu, Jian-Shing Liu
  • Publication number: 20180373625
    Abstract: A memory device and associated control method are provided. The memory device includes a memory array and a control circuit, which are electrically connected with each other. The memory array includes a plurality of memory groups. A first memory group among the plurality of memory groups includes at least one first memory unit. The control circuit executes the control method including following steps. Firstly, a first timestamp corresponding to a first time point is recorded when one of the at least one first memory unit is programmed. Then, state of the first memory group is identified based on the first timestamp and an identification rule, and the first memory group is retired when a condition being predefined in the identification rule is satisfied.
    Type: Application
    Filed: June 22, 2017
    Publication date: December 27, 2018
    Inventors: Chia-He Liu, Jian-Shing Liu
  • Patent number: 9959044
    Abstract: A memory device includes a first storage unit storing an address mapping table, and a control unit coupled to the first storage unit and including a second storage unit storing a risky mapping table and a cached mapping table. The control unit is configured to: write data into the first storage unit; update mapping information associated with the data in the risky mapping table; and store mapping information in the cached mapping table into the address mapping table.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: May 1, 2018
    Assignee: Macronix International Co., Ltd.
    Inventors: Ting-Yu Liu, Nai-Ping Kuo, Yi-Chun Liu, Jian-Shing Liu
  • Publication number: 20170322735
    Abstract: A memory device includes a first storage unit storing an address mapping table, and a control unit coupled to the first storage unit and including a second storage unit storing a risky mapping table and a cached mapping table. The control unit is configured to: write data into the first storage unit; update mapping information associated with the data in the risky mapping table; and store mapping information in the cached mapping table into the address mapping table.
    Type: Application
    Filed: May 3, 2016
    Publication date: November 9, 2017
    Inventors: Ting-Yu LIU, Nai-Ping KUO, Yi-Chun LIU, Jian-Shing LIU
  • Patent number: 8547755
    Abstract: Various discussed approaches include an improved grouping of edge word lines and center word lines of an erase group during erase verify and erase sub-operations of an erase operation. In another approach, changed voltage levels of edge word lines to address the over-erase issue of the erase group, and also improve erase time performance. Another approach uses dummy word lines.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: October 1, 2013
    Assignee: Macronix International Co., Ltd.
    Inventors: Yi-Fan Chang, Cheng Ming Yih, Su-chueh Lo, Jian Shing Liu, Kuen Long Chang, Chun-Hsiung Hung
  • Publication number: 20130100745
    Abstract: Various discussed approaches include an improved grouping of edge word lines and center word lines of an erase group during erase verify and erase sub-operations of an erase operation. In another approach, changed voltage levels of edge word lines to address the over-erase issue of the erase group, and also improve erase time performance. Another approach uses dummy word lines.
    Type: Application
    Filed: December 7, 2012
    Publication date: April 25, 2013
    Inventors: Yi-Fan Chang, Cheng Ming Yih, Su-chueh Lo, Jian Shing Liu, Kuen Long Chang, Chun-Hsiung Hung
  • Patent number: 8339861
    Abstract: Various discussed approaches include an improved grouping of edge word lines and center word lines of an erase group during erase verify and erase sub-operations of an erase operation. In another approach, changed voltage levels of edge word lines to address the over-erase issue of the erase group, and also improve erase time performance. Another approach uses dummy word lines.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: December 25, 2012
    Assignee: Macronix International Co., Ltd.
    Inventors: Yi-Fan Chang, Cheng Ming Yih, Su-chueh Lo, Jian Shing Liu, Kuen-Long Chang, Chun-Hsiung Hung
  • Publication number: 20110128791
    Abstract: Various discussed approaches include an improved grouping of edge word lines and center word lines of an erase group during erase verify and erase sub-operations of an erase operation. In another approach, changed voltage levels of edge word lines to address the over-erase issue of the erase group, and also improve erase time performance. Another approach uses dummy word lines.
    Type: Application
    Filed: July 12, 2010
    Publication date: June 2, 2011
    Applicant: Macronix International Co., Ltd.
    Inventors: Yi-Fan Chang, Cheng Ming Yih, Su-chueh Lo, Jian Shing Liu, Kuen-Long Chang, Chun-Hsiung Hung