Toshiba starts mass production of 15nm flash

Toshiba is to commence 15nm NAND flash production at the end of the month at its Fab 5 Yokkaichi Operations facility.

The process technology will first be applied to 2bit per cell 128GB NAND chips. The devices are said to achieve the same write speed as chips formed with the company's second generation 19nm process technology, but boost the data transfer rate to 53mb/s through a high speed interface. Toshiba is now applying the 15nm process technology to 3bit per cell chips, and aims to start mass production in the first quarter of this year. The company will also develop controllers for embedded NAND flash memory in parallel and introduce 3bit per cell products for smartphones and tablets, and will subsequently extend application to notebook PCs by developing a controller compliant with solid state drives (SSD).