By Rino Micheloni
This publication walks the reader throughout the subsequent step within the evolution of NAND flash reminiscence know-how, particularly the improvement of 3D flash thoughts, during which a number of layers of reminiscence cells are grown in the comparable piece of silicon. It describes their operating ideas, equipment architectures, fabrication thoughts and sensible implementations, and highlights why 3D flash is a new technology.
After reviewing industry tendencies for either NAND and stable country drives (SSDs), the e-book digs into the main points of the flash reminiscence mobilephone itself, masking either floating gate and rising cost seize applied sciences. there's a plethora of alternative fabrics and vertical integration schemes available in the market. New reminiscence cells, new fabrics, new architectures (3D Stacked, BiCS and P-BiCS, 3D FG, 3D VG, 3D complicated architectures); primarily, each one NAND producer has its personal answer. bankruptcy three to bankruptcy 7 provide a huge evaluate of the way 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 can be method a majority of these chapters include loads of bird’s-eye perspectives and move sections alongside the three axes.
The moment a part of the booklet is dedicated to different vital elements, equivalent to complicated packaging expertise (i.e. TSV in bankruptcy nine) and blunder correction codes, that have been leveraged to enhance flash reliability for decades. bankruptcy 10 describes the evolution from legacy BCH to the newest LDPC codes, whereas bankruptcy eleven bargains with one of the most contemporary developments within the ECC box. final yet now not least, bankruptcy 12 seems at 3D flash stories from a method 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 sufficient for company and datacenter purposes? those are the various questions that this e-book is helping answering by means of supplying insights into 3D flash reminiscence layout, strategy know-how and applications.
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