Samsung Electronics Co., Ltd.

Ung-hwan Kim

Jun-Jin Kong

Kyung-jin Kim

Eun-cheol Kim

Dong-Min Shin

Myung-Kyu Lee

Beom-Kyu Shin

Nam-Shik Kim

Se-Jin Lim

A method of reading multi-bit data stored in a memory cell of a flash memory includes attempting to perform hard decision (HD) decoding on output data from the flash memory, and performing soft decision (SD) decoding on the output data when the HD decoding cannot be performed. The performing of the SD decoding includes: changing a maximum number of iterations according to a threshold voltage distribution of the memory cell; and performing the SD decoding based on the changed maximum number of iterations.

Memory controllers and flash memory reading methods

A method of operating a memory controller includes; receiving hard decision data and first soft decision data from a non-volatile memory device, performing a first ECC decoding operation using the hard decision data and the first soft decision data: and then determining a second soft decision read voltage or reclaim operation of the non-volatile memory device based on the number of iteration operation of the first ECC (error correction code).

Memory controller operating method and memory controller

A method of estimating a deterioration state of a memory device comprises reading data from selected memory cells connected to a selected wordline of a memory cell array by applying to the selected wordline a plurality of distinct read voltages having values corresponding to at least one valley of threshold voltage distributions of the selected memory cells, generating quality estimation information indicating states of the threshold voltage distributions using the data read from the selected memory cells, and determining a deterioration state of a storage area including the selected memory cells based on the generated quality estimation information.

Method of estimating deterioration state of memory device and related method of wear leveling

Growing community of inventors

Seongnam-si, South Korea

Ung-hwan Kim