Semiconductor flash memory is an indispensable component of modern electronic systems which has gained a strategic position in recent decades due to the progressive shift from computing to consumer (and particularly mobile) products as revenue drivers for Integrated Circuits (IC) companies. This book provides a comprehensive overview of the different technological approaches currently being studied to fulfill future memory requirements. Two main research paths are identified and discussed. Different "evolutionary paths" based on the use of new materials (such as silicon nanocrystals for storage nodes and high-k insulators for active dielectrics) and of new transistor structures (such as multi-gate devices) are investigated in order to extend classical floating gate technology to the 32 nm node. "Disruptive paths" based on new storage mechanisms or new technologies (such as phase-change devices, polymer or molecular cross-bar memories) are also covered in order to address 22 nm and smaller IC generations. Finally, the main factors at the origin of these phenomena are identified and analyzed, providing pointers on future research activities and developments in this area.
Nonvolatile memories are becoming an increasingly important electronic component, due to the ever-increasing need for data storage in multimedia and other mobile applications where electronic components are replacing magnetic hard drives. Today, Flash is the main nonvolatile memory technology, but further scaling of this technology will likely be restricted by important physical and material limitations. This explains recent increased research on new concepts for nonvolatile memories, for which new developments in materials science and technology, the focus of this book, are key. Chapters include Advanced Flash Memory which deals with solutions for scaled Flash memory, including the use of new high-k layers and nanocrystals. Resistive switching concepts are discussed in the Oxide Resistive Switching Memory and Organic Resistive Switching Memory chapters. More research on polymer memories are detailed in Nanoparticle-Based Organic Memory and Organic Ferroelectric Memory. Two chapters deal with New Phase Change Memory and Deposition Methods and Future Explorative Memory Concepts, including piezoelectric, ferroelectric and ferromagnetic concepts.
Flash memories and memory systems are key resources for the development of electronic products implementing converging technologies or exploiting solid-state memory disks. This book illustrates state-of-the-art technologies and research studies on Flash memories. Topics in modeling, design, programming, and materials for memories are covered along with real application examples.