3D-DRAM Technology Increases Memory Density over Conventional DRAMs

Startup Announces Monolithic 3D DRAM Technology - MonolithIC 3D Inc., one of the industry’s leading innovators in 3D-IC technology, has unveiled a monolithic 3D DRAM technology. The startup claims this technology can provide a 2x-3x increase in memory density over conventional DRAMs at comparable costs.

Zvi Or-Bach, President and CEO of MonolithIC 3D, said, “The DRAM industry faces several difficult challenges today with scaling and, in particular, with lithography. Companies using our monolithic 3D DRAM technology can reduce their lithography risk and get a much better return-on-investment for their fab equipment.”

The Monolithic 3D DRAM technology was announced with an invited presentation at the American Vacuum Society 3D Workshop in San Jose. Dr. Deepak Sekar, Chief Scientist of MonolithIC 3D Inc. and presenter at the workshop said, “We use a 3D stacked architecture and share lithography steps among multiple memory layers. The NAND flash memory industry has been pursuing 3D technology with shared lithography steps with polysilicon transistors for some time now. At MonolithIC 3D Inc., we use single crystal silicon transistors, and that allowed us to apply these concepts to DRAM.”

The technology leverages a technique known as ion-cut to stack high-quality single crystal silicon layers at low thermal budgets. Ion-cut is the dominant technology used for producing silicon-on-insulator (SOI) wafers for logic technologies today and has been in manufacturing for more than 10 years. Several companies such as Silicon Genesis and Twin Creeks Technologies are exploring its use for solar as well.

MonolithIC 3D Inc. also presented its logic technologies recently at the CMOS Emerging Technologies Workshop at Whistler, Canada and at a 3D workshop at the International Conference on Technology & Instrumentation in Particle Physics in Chicago. Presentations on DRAM and logic technologies made by MonolithIC 3D Inc. at these events can be found at the company’s website monolithic3d.com. The startup also runs a blog at http://www.monolithic3d.com/blog.html, where Brian Cronquist, Zvi Or-Bach and Deepak Sekar reported on their presentations at Whistler, Chicago and San Jose respectively (monolithic3d.com/2/post/2011/06/introducing-our-monolithic-3d-dram-technology.html).

MonolithIC 3D, Inc., is an IP company dedicated to innovation in semiconductor design and fabrication. The company’s patented technologies offer chipmakers an economical, practical way to create monolithically integrated three-dimensional circuits. The company’s concepts have the potential to maintain or increase device speed and lower power requirements for a given node, while avoiding the need for continuous (and very costly) dimensional scaling that has been the basis for “Moore’s Law.” More information about the company, including detailed technical information, can be found at monolithic3D.com. [Source]

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