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業界首見QLC NAND SSD開始出貨！美光盤後持續大漲
美光科技(Micron Technology Inc.)、英特爾(Intel Corporation)5月21日宣布，業界首
見的4 bits/cell 3D NAND技術開始投產、出貨。
利用通過考驗的64層結構，新的4 bits/cell NAND技術讓每顆晶粒的密度達到1
terabit(Tb)、成為世界上密度最高的快閃記憶體。
英特爾非揮發性記憶體技術開發副總裁RV Giridhar指出，1Tb 4 bits/cell的商用化是非
揮發性記憶體(NVM)歷史上一項重大的里程碑。
美光21日同時宣布，業界首見採用革命性QLC(四級單元)NAND技術的SSD(5210 ION)開始對
戰略支持合作夥伴和客戶出貨、預計今年秋季將會擴大供貨。
美光指出，QLC NAND較現有TLC(三級單元)NAND的位元密度高出33%。
https://www.moneydj.com/KMDJ/News/NewsViewer.aspx?a=29eba80c-d4c4-4c36-98d3-7c851e5ddbf5
https://www.anandtech.com/show/12744/micron-launches-first-qlc-nand-micron-5210-ion-enterprise-sata-ssd
"The most important question is what the write endurance of the new QLC-based
SSDs will be. The 5210 ION's endurance rating will be less than that of the
5200 ECO, which is rated for around 1 DWPD in most capacities. Micron
indicates that their QLC NAND is good for around 1k Program/Erase cycles,
which suggests a limit of at most about 0.5 DWPD before write amplification
is taken into account. This is still higher than many consumer SSDs, where
0.3 DWPD is a typical rating for entry-level SATA SSDs with 3D TLC NAND."
Micron新聞稿:
http://investors.micron.com/releasedetail.cfm?releaseid=1068052