29 Jun '16, 10pm

What is the difference between 3D #VNAND 32L vs 48 L? @TechInsights digs deep to find out:

What is the difference between 3D #VNAND 32L vs 48 L? @TechInsights digs deep to find out:

Memory density and die floor plan Figure 1 shows 16 48L V-NAND dice with two F-Chips in an MCP (multichip package). Die efficiency is higher in the 48L. The 32L V-NAND die area is 84.3 mm2 while the 48L V-NAND die measures 99.8 mm2 , which is a 17.3% increase due to greater die length (Figure 2). Memory density per unit die area is increased to 2.57 Gb/mm2 . The memory density of leading-edge 2D planar NAND devices such as Toshiba 15 nm TLC NAND is 1.28 Gb/mm2 , (see more on our analysis on the Toshiba 15 nm NAND). The key feature differences in die floor plans are 1) planar (NAND memory array) area, 2) bitline switch and page buffer area, 3) LOGIC and peripheral area, and 4) the addition of F-chip. Each die has two planes. The NAND memory array area increased from 48.9 mm2 to 68.7 mm2 which is 40.3% larger. The area of the bitline switch circuit is the same as that of the...

Full article: http://www.eetimes.com/author.asp?section_id=36&doc_id=13...

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