By Rino Micheloni
This e-book walks the reader throughout the subsequent step within the evolution of NAND flash reminiscence expertise, particularly the improvement of 3D flash stories, within which a number of layers of reminiscence cells are grown in the comparable piece of silicon. It describes their operating ideas, equipment architectures, fabrication concepts and sensible implementations, and highlights why 3D flash is a new technology.
After reviewing marketplace developments for either NAND and good country drives (SSDs), the e-book digs into the main points of the flash reminiscence mobile itself, protecting either floating gate and rising cost seize applied sciences. there's a plethora of other fabrics and vertical integration schemes in the market. New reminiscence cells, new fabrics, new architectures (3D Stacked, BiCS and P-BiCS, 3D FG, 3D VG, 3D complicated architectures); essentially, each one NAND producer has its personal resolution. bankruptcy three to bankruptcy 7 supply a large assessment of ways 3D can materialize. The 3D wave is impacting rising stories to boot and bankruptcy eight covers 3D RRAM (resistive RAM) crosspoint arrays. Visualizing 3D buildings could be a problem for the human mind: this is often approach a lot of these chapters comprise loads of bird’s-eye perspectives and pass sections alongside the three axes.
The moment a part of the e-book is dedicated to different very important facets, similar to complicated packaging know-how (i.e. TSV in bankruptcy nine) and mistake correction codes, that have been leveraged to enhance flash reliability for decades. bankruptcy 10 describes the evolution from legacy BCH to the latest LDPC codes, whereas bankruptcy eleven offers with probably the most fresh developments within the ECC box. final yet now not least, bankruptcy 12 appears at 3D flash thoughts from a procedure perspective.
Is 14nm the final step for planar cells? Can a hundred layers be built-in in the comparable piece of silicon? Is four bit/cell attainable with 3D? Will 3D be trustworthy adequate for firm and datacenter purposes? those are a few of the questions that this booklet is helping answering by means of delivering insights into 3D flash reminiscence layout, approach know-how and applications.
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3D Flash Memories by Rino Micheloni