Partners Toshiba and SanDisk have developed 15-nanometer process technology for NAND flash memory widely used in smartphones and tablets. The development is the first in the world and will replace the second-generation 19-nm process technology when production begins at Toshiba's plant in Yokkaichi, Japan, Toshiba said.[ Keep up on the day's tech news headlines with InfoWorld's Today's Headlines: Wrap Up newsletter. ]