NDLI: Tri-level-cell phase change memory: toward an efficient and reliable memory system

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Tri-level-cell phase change memory: toward an efficient and reliable memory system

Content Provider	ACM Digital Library
Author	Yeo, Sungkap Lee, Hsien-Hsin S. Seong, Nak Hee
Abstract	There are several emerging memory technologies looming on the horizon to compensate the physical scaling challenges of DRAM. Phase change memory (PCM) is one such candidate proposed for being part of the main memory in computing systems. One salient feature of PCM is its multi-level-cell (MLC) property, which can be used to multiply the memory capacity at the cell level. However, due to the nature of PCM that the value written to the cell can drift over time, PCM is prone to a unique type of soft errors, posing a great challenge for their practical deployment. This paper first quantitatively studied the current art for MLC PCM in dealing with the resistance drift problem and showed that the previously proposed techniques such as scrubbing or error correction mechanisms have significant reliability challenges to overcome. We then propose tri-level-cell PCM and demonstrate its ability to achieving $10^{5}$ x lower soft error rate than four-level-cell PCM and 1.33 x higher information density than single-level-cell PCM. According to our findings, the tri-level-cell PCM shows 36.4% performance improvement over the four-level-cell PCM while achieving the soft error rate of DRAM.
Starting Page	440
Ending Page	451
Page Count	12
File Format	PDF
ISBN	9781450320795
DOI	10.1145/2485922.2485960
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2013-06-23
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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