Patent ID: 11961559
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 13:
14. An operating method of a storage device which includes a nonvolatile memory device including a plurality of memory cells arranged on a substrate in rows and columns and stacked in a direction perpendicular to the substrate, and a memory controller, the method comprising:
receiving, at the memory controller, a read request from an external host device;
performing, at the storage device, a read operation on selected memory cells of the nonvolatile memory device in response to the read request;
performing, at the storage device, a first check read operation on first neighbor memory cells of the selected memory cells of the nonvolatile memory device while sequentially selecting sets of read voltages;
performing, at the storage device, a second check read operation on second neighbor memory cells of the selected memory cells of the nonvolatile memory device while sequentially selecting the sets of read voltages; and
first selecting, at the storage device, a set of read voltages, which are used in the first check read operation and for which error correction succeeds, from among the sets of read voltages, in the second check read operation.