Contributing to the Environment through Our Products

The flash memory and solid-state drives (SSDs) that KIOXIA supplies are integrated into a wide range of products and used throughout society. We believe that we can contribute to realization of a low carbon society by supplying large capacity products and low-power-consumption products, and we are carrying out various activities.

Amidst the recent acceleration in the use of AI and IoT, needs are growing to increase the capacity and speed of flash memory and solid-state drive (SSD) products. By promoting increases in the capacity of flash memory by developing highly integrated technology, KIOXIA is working to reduce CO2 emissions per capacity both in manufacturing and use of flash memory and SSDs. Specifically, we contribute to CO2 emissions reduction by reducing the amount of electricity used per capacity and materials used when manufacturing, and by lowering power consumption when using products.

We believe that KIOXIA’s flash memory and SSDs will play an important role in the area of 5G (the fifth-generation mobile communication system), which is expected to spread in the future. Since faster, higher capacity devices are expected to become necessary in the 5G society, we presume that the cutting-edge large capacity flash memory and low-latency SSDs we provide will contribute to society in various fields. Thus, we promote increased capacity by developing highly integrated technology as our top priority.

Examples of fields that KIOXIA products contribute to

Examples of fields that KIOXIA products contribute to

Product Case Studies: Increasing the Capacity of 3D Flash Memory

KIOXIA has developed a 4-bit-per-cell (quad-level cell; QLC) by applying the 96-layer process of three-dimensional (3D) flash memory BiCS FLASH™. Compared to the conventional 3-bit-per-cell (triple-level cell), the QLC has an additional bit (4 bits in total), stored in a single memory cell, which enables us to provide memory products with even higher capacity.

This product achieves a capacity of 1.33 terabits per chip. By forming a 16-stage layering in one package, it can achieve a large capacity of 2.66 terabytes. Today, the amount of data generated by mobile devices is increasing due to the spread of social media and the advancement of IoT. Accordingly, needs for analyzing and utilizing such data in real time are expected to increase dramatically. Thus, large capacity, faster-than-HDD storage is in demand and our QLC products that leverage the 96-layer process will contribute to satisfying such storage needs.

Going forward, KIOXIA will continue to strive to increase the capacity and improve the performance of 3D flash memory as well as to carry out development that meets markets’ diverse needs, including the storage market for data centers, where demand is growing.

* Product names and service names listed above may be trademarks of their respective companies.

Product Case Studies: Power Efficiency Improvement of Single Package SSD

KIOXIA has developed the BG4 Series NVMe™ SSD with a maximum capacity of 1,024 GB [Note 1], which includes BiCS FLASH™ 3D flash memory that employs the 96-layer process and a controller into a single package. Shipment of the BG4 Series for PC OEMs has been performed from the second quarter of FY2019.

This product supports PCIe® Gen3 x 4 lanes and achieves the industry’s highest level of read performance [Note 2] (sequential read  performance: max. 2,300 MB/s; random read performance: max. 390,000 IOPS). Thanks to the newly developed controller and lower power consumption of BiCS FLASH™, this product improves power efficiency by up to approximately 20% [Note 2] for reading and up to approximately 7% [Note 3] for writing compared to our previous generation product, the "BG3 Series."

By placing a large capacity SSD with improved power efficiency in a thin, compact package, the BG4 Series also achieves resource savings and expands the possibilities for thin, flexible design of mobile PCs and other devices.

PCIe® is a registered trademark of PCI-SIG.
NVMe™ and NVM Express™ are trademarks of NVM Express, Inc.
Other product names and services listed in the above may be used as trademarks or registered trademarks by the respective companies.

[Note 1] Definition of capacity: KIOXIA defines a gigabyte (GB) as 1,000,000,000 bytes, and terabyte (TB) as 1,000,000,000,000. Some computer operating systems, however, report storage capacity using powers of 2 for the definition of 1 GB = 230 bytes = 1,073,741,824 bytes and therefore shows less storage capacity. Available storage capacity will vary based on file size, formatting, settings, software and operating system, or other factors. Actual formatted capacity may vary.

[Note 2] KIOXIA Corporation survey, in the segment of Single Package SSDs, as of January 9, 2019.

[Note 3] Results of a comparison of power performance between the BG4 PCIe® Gen3 x 4 lane model and the BG3 PCIe® Gen3 x 2 lane model conducted in KIOXIA’s test environment.


NVMe™ SSD, BG4 series

NVMe™ SSD, BG4 series