A Fully Performance Compatible 45 nm 4-Gigabit Three Dimensional Double-Stacked Multi-Level NAND Flash Memory With Shared Bit-Line Structure
Kitae Park, Myounggon Kang, Soonwook Hwang, Doogon Kim, Hoosung Cho, Youngwook Jeong, Yong-Il Seo, Jae Hoon Jang, Han-Soo Kim, Yeong-Taek Lee, Soon‐Moon Jung, Changhyun Kim · IEEE Journal of Solid-State Circuits · 2009
A 3-dimensional double stacked 4 gigabit multilevel cell NAND flash memory device with shared bitline structure have successfully developed. The device is fabricated by 45 nm floating-gate CMOS and single-crystal Si layer stacking technologies. To support fully compatible device performance and characteristics with conventional planar device, shared bitline architecture including Si layer-dedicated decoder and Si layer-compensated control schemes are also developed. By using the architecture and the design techniques, a memory cell size of 0.0021 mum2/bit per unit feature area which is smallest cell size and 2.5 MB/s program throughput with 2 kB page size which is almost equivalent performance compared to conventional planar device are realized.