Toshiba will start supplying qlc-flash samples

Jul

20

2018

to manufacturers in September
Toshiba has prepared a prototype of its latest bics memory chip consisting of 96 layers and using qlc technology. The manufacturer will deliver samples to manufacturers in early September and expects to start mass production next year.

Toshiba BiCS with qlc Due to the switch to qlc technology, where each memory cell contains four bits, the capacity of the memory chips is considerably increased compared to tlc memory where the cells contain three bits.

Toshiba can now make memory chips with a capacity of up to 1.33 terabit. According to Toshiba , it is possible to stack sixteen of these chips to achieve a capacity of 2.66 Terabytes in one package. SSDs can consist of several of these packages, for an even higher capacity.

From September, Toshiba will supply memory chips to manufacturers of SSDs and SSD controllers, so that they can make products based on the qlc memory. Mass production must start in 2019.

Various memory manufacturers are in the process of switching from tlc to qlc nand. Samsung recently started the production of flash memory that consists of 96 layers, but currently does so with tlc memory and later switches to qlc. Intel and Micron already launched a ssd for servers based on qlc-nand in May. Intel has indicated that this year it will come up with consumer SSDs on the basis of qlc-nand. Toshiba announced its qlc memory last year.

Current consumer ssds mainly use tlc-nand, with three bits per cell. Future ssds with qlc memory have a higher density and that makes lower prices and higher capacities possible. There are disadvantages, such as a lower speed and a shorter lifespan, but manufacturers can partly compensate for this with modifications to the firmware and the controller, and by adding more memory chips for overprovisioning .

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