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US Patent 11610641 Wafer-yields and write-QoS in flash-based solid state drives

Patent 11610641 was granted and assigned to SK Hynix on March, 2023 by the United States Patent and Trademark Office.

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Is a
Patent
Patent
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Patent attributes

Patent Applicant
SK Hynix
SK Hynix
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Current Assignee
SK Hynix
SK Hynix
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Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
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Patent Number
116106410
Patent Inventor Names
Fan Zhang0
Aman Bhatia0
Date of Patent
March 21, 2023
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Patent Application Number
169251580
Date Filed
July 9, 2020
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Patent Citations
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US Patent 10650886 Block management for dynamic single-level cell buffers in storage devices
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Patent Primary Examiner
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Cynthia Britt
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CPC Code
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G11C 2211/5641
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G11C 29/765
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G11C 29/04
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G11C 29/44
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G06F 2212/214
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G11C 16/10
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G06F 3/064
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G06F 12/0246
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...

A non-volatile data storage device includes memory cells arranged in a plurality of blocks and a memory controller coupled to the memory cells for controlling operations of the memory cells. The memory controller is configured to determine if a given block is a bad m-bit multi-level block. In an m-bit multi-level block, each memory cell is an m-bit multi-level cell (MLC), m being an integer equal to or greater than 2. Upon determining that the given block is a good m-bit multi-level block, the memory controller assigns the given block to be an m-bit multi-level user block. Upon determining that the given block is a bad m-bit multi-level block, the memory controller determines if the given block is a good n-bit block. In an n-bit block, each memory cell is an n-bit cell, n being an integer less than m. Upon determining that the given block is a good n-bit block, the memory controller assigns the given block to be an n-bit user block or an n-bit write-buffer block.

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