Patents by Inventor Chun S. Yeung

Chun S. Yeung 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: 12002531
    Abstract: Methods, systems, and devices for techniques for retiring blocks of a memory system are described. In some examples, aspects of a memory system or memory device may be configured to determine an error for a block of memory cells. Upon determining the occurrence of the error, the memory system may identify one or more operating conditions associated with the block. For example, the memory system may determine a temperature of the block, a cycle count of the block, a quantity of times the block has experienced an error, a bit error rate of the block, and/or a quantity of available blocks in the associated system. Depending on whether a criteria associated with a respective operating condition is satisfied, the block may be enabled or retired.
    Type: Grant
    Filed: January 19, 2022
    Date of Patent: June 4, 2024
    Assignee: Micron Technology, Inc.
    Inventors: Deping He, Jonathan S. Parry, Chun Sum Yeung
  • Patent number: 11942174
    Abstract: Methods, systems, and devices for topology-based retirement in a memory system are described. In some examples, a memory system or memory device may be configured to evaluate error conditions relative to a physical or electrical organization of a memory array, which may support inferring the presence or absence of defects in one or more structures of a memory device. For example, based on various evaluations of detected errors, a memory system or a memory device may be able to infer a presence of a short-circuit, an open circuit, a dielectric breakdown, or other defects of a memory array that may be related to wear or degradation over time, and retire a portion of a memory array based on such an inference.
    Type: Grant
    Filed: January 12, 2022
    Date of Patent: March 26, 2024
    Assignee: Micron Technology, Inc.
    Inventors: Chun S. Yeung, Deping He, Jonathan S. Parry
  • Publication number: 20240069735
    Abstract: Described are systems and methods related to a memory block erase protocol. An example system includes a memory device having a memory array including a plurality of memory cells. The system further includes a processing device coupled to the memory device. The processing device is to determine a value of a metric associated with the memory array. Responsive to determine that the value of the metric is below a predetermined threshold, the processing device is further to initiate an erase protocol of the memory device. The processing device is further to erase sets of memory cells associated with one or more memory blocks of the memory array. The processing device is further to receive a programming command directed to the first set of memory cells. The processing device is further to perform a programming operation with respect to a set of memory cells responsive to receiving the programming command.
    Type: Application
    Filed: August 29, 2022
    Publication date: February 29, 2024
    Inventors: Chun Sum Yeung, Deping He, Ting Luo, Guang Hu, Jonathan S. Parry
  • Publication number: 20220254434
    Abstract: Methods, systems, and devices for topology-based retirement in a memory system are described. In some examples, a memory system or memory device may be configured to evaluate error conditions relative to a physical or electrical organization of a memory array, which may support inferring the presence or absence of defects in one or more structures of a memory device. For example, based on various evaluations of detected errors, a memory system or a memory device may be able to infer a presence of a short-circuit, an open circuit, a dielectric breakdown, or other defects of a memory array that may be related to wear or degradation over time, and retire a portion of a memory array based on such an inference.
    Type: Application
    Filed: January 12, 2022
    Publication date: August 11, 2022
    Inventors: Chun S. Yeung, Deping He, Jonathan S. Parry