Knowing the exact diameter of the silicon substrate (300 millimeters), you can set the area of one of the crystal by counting the number of stamps vertically and horizontally. According to the calculations AnandTech, the area of one of the crystal memory SanDisk-Toshiba is 139 square millimeters, which is the best among the other chips with a density of 128 Gbps and a flat arrangement.
SanDisk and Toshiba secret is to use a bi-directional sense amplifiers and architecture All Bit Line (ABL), which reduced the size of the peripheral circuits and increase the ratio of memory to the chip area. Evaluation AnandTech, in memory SanDisk-Toshiba, the ratio is about 80%, which is a typical figure for chips with a density of 128 Gbps. The increase in circuit density and usually leads to an increase in this index.
As expected, the 15-nm MLC NAND memory will appear in the series solid-state drives in the fourth quarter 2014. Related Products :
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