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February 12, 2009: SanDisk will begin mass-production of the world's first high performance 4-bits-per-cell (X4) flash memory in the first half of 2009.
SanDisk co-developed the 64Gb X4 flash memory chip on 43nm technology with Toshiba Corporation. The new 43nm 64Gb X4 chip is the highest capacity and highest density flash memory die in the world to enter production this year, boasting a 7.8MB/sec memory write performance that is comparable with current multi-level cell technologies. SanDisk's patented All-Bit-Line (ABL) architecture as well as the newly introduced three-step programming (TSP) and sequential sense concept (SSC) serve as key enablers to X4's impressive performance.
The X4 controller, developed and owned by SanDisk, utilizes a first-of-its-kind error correcting code (ECC) scheme specifically developed for use in storage systems, and tailored to support the 16 levels of distribution needed for 4-bits-per-cell. For details, visit www.sandisk.com.
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