This publication walks the reader throughout the subsequent step within the evolution of NAND flash reminiscence know-how, particularly the improvement of 3D flash stories, during which a number of layers of reminiscence cells are grown in the comparable piece of silicon. It describes their operating rules, gadget architectures, fabrication suggestions and sensible implementations, and highlights why 3D flash is a new technology.
After reviewing industry traits for either NAND and good country drives (SSDs), the publication digs into the main points of the flash reminiscence mobilephone itself, overlaying either floating gate and rising cost capture applied sciences. there's a plethora of other 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); essentially, every one NAND producer has its personal resolution. bankruptcy three to bankruptcy 7 provide a extensive review of the way 3D can materialize. The 3D wave is impacting rising thoughts besides and bankruptcy eight covers 3D RRAM (resistive RAM) crosspoint arrays. Visualizing 3D constructions could be a problem for the human mind: this is often manner most of these chapters comprise loads of bird’s-eye perspectives and pass sections alongside the three axes.
The moment a part of the publication is dedicated to different very important features, equivalent 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 bargains with one of the most fresh developments within the ECC box. final yet no longer least, bankruptcy 12 appears at 3D flash stories 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 company and datacenter purposes? those are many of the questions that this ebook is helping answering by way of supplying insights into 3D flash reminiscence layout, approach expertise and applications.