A 7MB/s 64Gb 3-bit/cell DDR NAND flash memory in 20nm-node technology. - Ki-Tae Park; Ohsuk Kwon; Sangyong Yoon; Myung-Hoon Choi; In-Mo Kim; Bo-Geun Kim; Min-Seok Kim; Yoon-Hee Choi; Seung-Hwan Shin; Youngson Song; Joo-Yong Park; Jae-Eun Lee; et al. (ISSCC, 2011)