Patents by Inventor Bruce Liikanen

Bruce Liikanen 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: 11727994
    Abstract: An example memory sub-system includes a memory device and a processing device, operatively coupled to the memory device. The processing device is configured to program a first block in a first die of the memory device and a second block in a second die of the memory device, wherein the first die and the second die are assigned to a die group; and associate the die group with a threshold voltage offset bin.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: August 15, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Michael Sheperek, Kishore Kumar Muchherla, Mustafa N. Kaynak, Vamsi Pavan Rayaprolu, Bruce A. Liikanen, Larry J. Koudele
  • Publication number: 20230245708
    Abstract: Disclosed is a system that comprises a memory device and a processing device, operatively coupled with the memory device, to perform operations that include, responsive to detecting a triggering event, selecting a family of memory blocks of the memory device, the selected family being associated with a set of bins, each bin associated with a plurality of read voltage offsets to be applied to base read voltages during read operations. The operations performed by the processing device further include calibration operations to determine data state metric values characterizing application of read voltage offsets of various bins. The operations performed by the processing device further include identifying, based on the determined data state metrics, a target bin and associating the selected family with the target bin.
    Type: Application
    Filed: April 11, 2023
    Publication date: August 3, 2023
    Inventors: Michael Sheperek, Bruce A. Liikanen, Steven Michael Kientz
  • Patent number: 11715530
    Abstract: Several embodiments of memory devices and systems with offset memory component automatic calibration error recovery are disclosed herein. In one embodiment, a system includes at least one memory region and calibration circuitry. The memory region has memory cells that read out data states in response to application of a current read level signal. The calibration circuitry is operably coupled to the at least one memory region and is configured to determine a read level offset value corresponding to one or more of a plurality of offset read level test signals, including a base offset read level test signal. The base offset read level test signal is offset from the current read level signal by a predetermined value. The calibration circuitry is further configured to output the determined read level offset value.
    Type: Grant
    Filed: June 10, 2022
    Date of Patent: August 1, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Bruce A. Liikanen, Gerald L. Cadloni, Gary F. Besinga, Michael G. Miller, Renato C. Padilla
  • Patent number: 11714580
    Abstract: Aspects of the present disclosure are directed to performing varying frequency memory sub-system background scans using either or both a timer and an I/O event limit. This can be accomplished by identifying a background scan trigger event from one of multiple possible types of background scan trigger events, such as a timer expiration or reaching an event count limit. In response to the background scan trigger event, a background scan can be initiated on a memory portion. The background scan can produce results, such as CDF-based data. When a metric based on the results exceeds a background scan limit, a refresh relocation can be performed and logged. A metric can be generated based on the CDF-based data, obtained error recovery depth data, or refresh relocation event data. When the metric is above or below corresponding background scan thresholds, a background scan frequency can be adjusted.
    Type: Grant
    Filed: July 15, 2022
    Date of Patent: August 1, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Gerald L. Cadloni, Michael Sheperek, Francis Chew, Bruce A. Liikanen, Larry J. Koudele
  • Patent number: 11714709
    Abstract: Several embodiments of systems incorporating memory components are disclosed herein. In one embodiment, a memory system can include a memory component and a processing device configured to access quality metrics corresponding to memory regions of the memory component. In some embodiments, the processing device can compare the quality metrics to one or more memory management thresholds. In some embodiments, when the quality metrics meet and/or exceed a first threshold, a refresh operation can be scheduled and/or performed on a corresponding memory region. In these and other embodiments, when the quality metrics meet and/or exceed a second threshold, the memory region is retired and removed from an active pool of memory regions.
    Type: Grant
    Filed: November 24, 2021
    Date of Patent: August 1, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Gerald L. Cadloni, Bruce A. Liikanen
  • Patent number: 11709775
    Abstract: A system includes a memory device and a processing device, operatively coupled to the memory device, the processing device to perform operations comprising: measuring one of a temperature voltage shift or a read bit error rate of fixed data stored in the memory device in response to detecting a power on of the memory device, the fixed data having been programmed in response to detecting a power loss; estimating an amount of time for which the memory device was powered off based on results of the measuring; and in response to the amount of time satisfying a threshold criterion, updating a value for a temporal voltage shift of a block family based on the amount of time.
    Type: Grant
    Filed: March 14, 2022
    Date of Patent: July 25, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Michael Sheperek, Bruce A. Liikanen, Steven Michael Kientz
  • Patent number: 11705215
    Abstract: Several embodiments of systems incorporating memory sub-systems are disclosed herein. In one embodiment, a memory sub-system can include a memory component and a processing device configured to perform a background scan on a memory region of the memory component. In some embodiments, the background scan includes generating a bit error count (BEC) of a codeword saved on the memory region and saving statistical information corresponding to the BEC of the codeword to a histogram statistics log. In some embodiments, when the BEC of the codeword is greater than a BEC threshold, a refresh operation is scheduled for the memory region and/or logged. In these and other embodiments, when one or more error recovery error correction code (ECC) operations do not correct bit errors in the codeword, a refresh and/or retirement operation is schedule for the memory region and/or is logged.
    Type: Grant
    Filed: February 25, 2022
    Date of Patent: July 18, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Gerald L. Cadloni, Bruce A. Liikanen
  • Patent number: 11705193
    Abstract: A method can include receiving a request to read data from a memory cell of a memory device coupled with the processing device, determining a voltage distribution parameter value associated with the memory cell, determining a set of read levels associated with the voltage distribution parameter value, wherein each read level in the determined set of read levels corresponds to a respective voltage distribution of the memory cell, and reading, using the determined set of read levels, data from the memory cell. The voltage distribution parameter value can be determined by identifying a particular voltage distribution of the memory cell by sampling the memory cell at a plurality of voltage levels, and determining the voltage distribution parameter value based on the particular voltage distribution. The voltage distribution parameter value can be a voltage value that is included in the particular voltage distribution.
    Type: Grant
    Filed: February 1, 2021
    Date of Patent: July 18, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Shane Nowell, Steven Michael Kientz, Michael Sheperek, Mustafa N Kaynak, Kishore Kumar Muchherla, Larry J Koudele, Bruce A Liikanen
  • Patent number: 11705208
    Abstract: An example memory sub-system includes a memory device and a processing device, operatively coupled to the memory device. The processing device is configured to identify a set of embedded servo cells stored on the memory device; determine a read voltage offset by performing read level calibration based on the set of embedded servo cells; and apply the read voltage offset for reading a memory page associated with the set of embedded servo cells.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: July 18, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Larry J. Koudele, Bruce A. Liikanen, Michael Sheperek
  • Patent number: 11693745
    Abstract: An example memory sub-system includes a memory device and a processing device, operatively coupled to the memory device. The processing device is configured to detect a power-up state of the memory device following a power loss event; detect a read error with respect to data residing in a block of the memory device, wherein the block is associated with a current voltage offset bin; and perform temporal voltage shift (TVS)-oriented calibration for associating the block with a new voltage offset bin.
    Type: Grant
    Filed: November 23, 2020
    Date of Patent: July 4, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Bruce A. Liikanen, Shane Nowell, Steven Michael Kientz
  • Publication number: 20230207043
    Abstract: Disclosed is a system including a memory device having a plurality of physical cells and a processing device, operatively coupled with the memory device. The processing device maintains association of block families with a first (second, etc.) bin of a plurality of bins, each of the plurality of bins associated with one or more read voltage offsets. The read voltage offsets are used to compensate for a temporal read voltage shift caused by a charge loss by memory cells of the block families. Responsive to an occurrence of a power event, the processing device performs diagnostics of one or more blocks of various block families and determines whether to maintain association of the block families with current bins of the respective block families or to associate the block families with different bins.
    Type: Application
    Filed: March 1, 2023
    Publication date: June 29, 2023
    Inventors: Michael Sheperek, Bruce A. Liikanen, Steven Michael Kientz
  • Patent number: 11675511
    Abstract: An example memory sub-system includes a memory device and a processing device, operatively coupled to the memory device. The processing device is configured to perform operations comprising assigning a plurality of data streams to a block family comprising a plurality of blocks of a memory device; responsive to programming a first block associated with a first data stream of the plurality of data streams, associating the first block with the block family; and responsive to programming a second block associated with a second data stream of the plurality of data streams, associating the second block with the block family.
    Type: Grant
    Filed: June 22, 2022
    Date of Patent: June 13, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Michael Sheperek, Bruce A. Liikanen, Peter Feeley, Larry J. Koudele, Shane Nowell, Steven Michael Kientz
  • Patent number: 11675509
    Abstract: An example memory sub-system includes a memory device and a processing device, operatively coupled to the memory device. The processing device is configured to open a first block family associated with the memory device; assign a first cursor of a plurality of cursors of the memory device to the first block family; responsive to programming a first block associated with the first cursor, associate the first block with the first block family; open, while the first block family is open, a second block family associated with the memory device; assign a second cursor of the plurality of cursors of the memory device to the second block family; and responsive to programming a second block associated with the second cursor, associate the second block with the second block family.
    Type: Grant
    Filed: October 29, 2020
    Date of Patent: June 13, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Shane Nowell, Michael Sheperek, Larry J Koudele, Bruce A Liikanen, Steve Kientz
  • Patent number: 11669380
    Abstract: One or more of multiple metrics for multiple logical page types of the memory device are determined. Each of the metrics is indicative of a number of bit errors associated with a particular logical page type of the multiple logical page types. A current page margin associated with a first logical page type of the multiple logical page types is modified to determine a modified page margin based at least in part on a ratio using one or more of the multiple metrics. The current page margin associated with the first logical page type is adjusted in accordance with the modified page margin.
    Type: Grant
    Filed: July 12, 2021
    Date of Patent: June 6, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Michael Sheperek, Larry J. Koudele, Bruce A. Liikanen
  • Patent number: 11669398
    Abstract: A memory system is disclosed, including a memory component and a processing device configured to decode one or more codewords saved to a memory region of the memory component, detect that a number of bit errors corresponding to the decoding of the codeword exceeds a correction capability of the processing device, and execute an error recovery routine to reduce the number of detected bit errors to within the correction capability. The error recovery routine can include error recovery operations that are sequentially executed either until the number of bit errors is successfully reduced to within the correction capability or until a set of the error recovery operations has been executed. The error recovery operations can be ordered according to one or more factors, including energy used to execute a respective error recovery operation, a duration of the respective operation, and/or a likelihood of success of the respective operation.
    Type: Grant
    Filed: December 28, 2020
    Date of Patent: June 6, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Gerald L. Cadloni, Bruce A. Liikanen, Francis Chew, Larry J. Koudele
  • Publication number: 20230153003
    Abstract: A system includes a memory device and a processing device to initialize a block family associated with the memory device and a timer at initialization of the block family. The processing device further stores, in non-volatile memory of the memory device, a value of the timer before powering down the system while the block family is still open. The processing device further detects a power on of the system and measures a data state metric associated with one or more memory cell of a page of the memory device that is associated with the block family. The processing device further compares a level of the data state metric to a temporal voltage shift function to estimate a time after program value of the page and increments the value of the timer, restored from the non-volatile memory, based on the time after program value.
    Type: Application
    Filed: January 18, 2023
    Publication date: May 18, 2023
    Inventors: Michael Sheperek, Larry J. Koudele, Bruce A. Liikanen, Steven Michael Kientz, Kishore Kumar Muchherla
  • Patent number: 11651828
    Abstract: Described herein are embodiments related to first-pass dynamic program targeting (DPT) operations on memory cells of memory systems. A method includes determining that a first programming pass of a programming operation has been performed on a memory cell of the memory component, and performing a dynamic program targeting (DPT) operation on the memory cell to calibrate a first program-verify (PV) target value that results in an adjustment to a placement of a first first-pass programming distribution and a second PV target value that results in an adjustment to a placement of a second first-pass programming distribution before a second programming pass of the programming operation is performed on the memory cell.
    Type: Grant
    Filed: July 19, 2021
    Date of Patent: May 16, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Michael Sheperek, Larry J. Koudele, Bruce A. Liikanen
  • Patent number: 11636913
    Abstract: Disclosed is a system that comprises a memory device and a processing device, operatively coupled with the memory device, to perform operations that include, responsive to detecting a triggering event, selecting a family of memory blocks of the memory device, the selected family being associated with a set of bins, each bin associated with a plurality of read voltage offsets to be applied to base read voltages during read operations. The operations performed by the processing device further include calibration operations to determine data state metric values characterizing application of read voltage offsets of various bins. The operations performed by the processing device further include identifying, based on the determined data state metrics, a target bin and associating the selected family with the target bin.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: April 25, 2023
    Assignee: Micron Technology, Inc.
    Inventors: Michael Sheperek, Bruce A. Liikanen, Steven Michael Kientz
  • Publication number: 20230115960
    Abstract: A method includes associating, by a processing device, a set of dies of a block family with a die family, wherein the block family is associated with a first threshold voltage offset bin for voltage offsets to be applied in a read operation; and responsive to detecting a triggering event, associating each die of the set of dies with a second threshold voltage offset bin for voltage offsets to be applied in a read operation, wherein the second threshold voltage offset bin is selected based on a representative die of the set of dies associated with the die family.
    Type: Application
    Filed: December 14, 2022
    Publication date: April 13, 2023
    Inventors: Michael Sheperek, Bruce A. Liikanen, Steve Kientz, Anita Ekren, Gerald Cadloni
  • Publication number: 20230099349
    Abstract: An apparatus includes circuitry configured to generate multiple results, each result using a different read voltage, in response to one or each received data access command. The multiple read results may be used to dynamically calibrate a read voltage assigned to generate a read result in response to a read command.
    Type: Application
    Filed: December 1, 2022
    Publication date: March 30, 2023
    Inventors: Gerald L. Cadloni, Bruce A. Liikanen, Violante Moschiano