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US 12,586,615 B2Granted
Controller, storage device and method for operating storage device
AssigneeSK hynix Inc.
InventorsSang Ho Yun, Hyuk Min Kwon, Nam Kyeong Kim, Dae Sung Kim, Jeong Myung Lee
Life of this patent
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Abstract
A read pattern obtained in a read operation for determining an optimal read voltage when an initial read operation fails is stored, and is used in a read operation to be subsequently performed for determining a new optimal read voltage.
Claims18
A storage device comprising:
- a memory including a plurality of memory cells;
- and
- a controller configured to determine at least two first optimal read voltages by performing a first read operation on at least a part of the plurality of memory cells, to store at least two read patterns obtained in a process of reading at least two bit read pages of the memory through the first read operation, and to identify at least two second optimal read voltages obtained through a second read operation different from the first read operation, by using the at least two read patterns.
A method for operating a storage device, comprising:
- determining at least two first optimal read voltages for at least a part of a plurality of memory cells by performing a first read operation;
- storing at least two read patterns obtained in a process of reading at least two bit read pages of a memory through the first read operation;
- determining at least two second optimal read voltages by performing a second read operation different from the first read operation;
- and
- identifying the at least two second optimal read voltages using the at least two read patterns.
2 more elements
A controller comprising:
- a buffer memory;
- and
- a processor configured to determine at least two first optimal read voltages by performing a first read operation, to store at least two read patterns obtained in a process of reading at least two bit read pages of a memory through the first read operation in the buffer memory, and to identify at least two second optimal read voltages determined through a second read operation different from the first read operation, by using the at least two read patterns.
Dependencies are inferred from the claim text.