Toshiba Demonstrates NVMe SSD With 64-Layer BiCS3 3D NAND
 

Toshiba's transition from planar NAND flash to 3D NAND flash memory has been a long, drawn-out process. Their BiCS 3D NAND architecture is on its third generation but has yet to have any significant impact on the SSD market. The first generation of BiCS 3D NAND was never mass produced. The second generation 256Gb 48-layer BiCS2 3D NAND has seen some use in memory cards and smartphones, but its only presence in the SSD market has been the BG series—a relatively low-volume OEM-only line of BGA SSDs. It's enough to prove that their 3D NAND isn't vaporware, but hasn't done anything to alleviate the ongoing global NAND shortage or push prices down. Toshiba's third generation 3D NAND is planned to be the one that finally displaces planar NAND, with a 512Gb 64-layer TLC part that should be able to beat the price/GB of Toshiba's 15nm planar TLC, and a smaller 256Gb part for lower-capacity applications like memory cards.

http://www.anandtech.com/show/11353/...-bics3-3d-nand