A Novel Adaptive-Refresh Scheme to Reduce Refresh with Page Endurance Variance in 3D TLC NAND Flash Memories

Xianliang Wang; Qi Wang; Bo Zhang; Jing He; Zongliang Huo

doi:10.1587/elex.19.20220198

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A Novel Adaptive-Refresh Scheme to Reduce Refresh with Page Endurance Variance in 3D TLC NAND Flash Memories

Xianliang Wang, Qi Wang, Bo Zhang, Jing He, Zongliang Huo

著者情報

キーワード: 3D TLC NAND, reliable storage time, refresh, page endurance

ジャーナルフリー早期公開

論文ID: 19.20220198

DOI https://doi.org/10.1587/elex.19.20220198

この記事には本公開記事があります。

The final version of this article is now available: Vol. 19 (2022), No. 13 pp. 20220198-20220198

詳細

抄録

With aggressive scaling and multi-bit storage technology, reliability issues of 3D NAND flash memory are increasingly serious. Flash memory reliable storage time is limited by retention errors. Refresh has been an effective approach to extend storage time by rewriting the data. The critical issue is that it brings additional read and write operations, seriously degrades system performance. In this paper, a novel adaptive-refresh scheme is proposed to reduce refresh count by exploiting the page endurance variance in 3D TLC NAND flash memory. Experimental results show that the scheme can significantly reduce refresh count.

責任著者(Corresponding author)

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