The State of ZettaRAM

ZettaRAM is a nascent memory technology with roots in molecular electronics. ZettaRAM patents and papers are distilled and consolidated into a unified discussion. Various embodiments and key novel properties are discussed with a bias toward computer architecture and system design implications. Embodiments include transistor-free crossbar arrays and two hybrid molecule/silicon implementations, a flash-like cell and a 1T-1C DRAM cell. Key properties of the core technology include (1) flexibility and precision through molecular engineering, (2) self-assembly, (3) scalability through charge-voltage decoupling, (4) speed/energy tradeoff, (5) multiple discrete states, and (6) mixed molecules. Implications include inexpensive fabrication of high performance memory (by all metrics), practical mixed logic/DRAM, 3D memory, exceeding DRAM power scaling limits, intelligent power management, efficient multi-bit storage, memory hierarchies cohabiting the same space, and multiple virtual products in one physical product. Thus, molecular memory has qualities of a disruptive technology. Computer architects and system designers should play a central role in charting its use