nand-thermal-annealing · research · also flash thermal annealing

NAND thermal annealing

NAND thermal annealing is a controlled heat treatment studied for partially reversing cycling-induced degradation in flash-memory cells.

Related Observatory article: NAND thermal annealing on hesela.com

A 2024 raw-chip study tested 64-layer TLC and 32-layer MLC floating-gate NAND, not a complete SSD [1]. Its roughly 30% TLC endurance improvement is a curve-based, protocol-specific estimate; recovery of an error metric is not restoration to fresh-cell endurance. Evaluation reprogrammed data after treatment. Heating a populated SSD is not a supported repair procedure established by this research.

Relations

related
nand-self-recovery, nand-dwell-time, floating-gate, program-erase-cycle, data-retention

Citations

  1. Buddhanoy, Pasricha and Ray. Life-after-Death: Exploring Thermal Annealing Conditions to Enhance 3D NAND SSD Endurance. HotStorage 2024, sections 4-6 and figure 6. DOI: 10.1145/3655038.3665949. CC BY 4.0; paraphrased here, no figures reproduced. (accessed 2026-10-16)
  2. Wu, Dong and Zhang. Exploiting Heat-Accelerated Flash Memory Wear-Out Recovery to Enable Self-Healing SSDs. HotStorage 2011, sections II and IV: proposed architecture and simulation. (accessed 2026-10-16)
  3. Hesela: 3D NAND retention, self-recovery and thermal annealing evidence (accessed 2026-10-16)

JSON: /data/terms/nand-thermal-annealing.json