15 Dec '12, 6pm

New post: More-than-Moore memory grows up

Moore’s Law may not be running out of steam, but it may be running out of money, as scaling to smaller geometries becomes more cost prohibitive. We also have an insatiable appetite for memory these days, but our tastes are changing from DRAM to nonvolatile memory—a market largely served by flash devices. Whereas DRAM can possibly scale down to 1 nm, we are already encountering floating-gate scaling problems for NAND flash. The answer to the scaling problem appears to be growing devices “up”; the question is how best to do it. Three-dimensional die stacking uses a silicon interposer and TSVs (through-silicon vias) to connect the stacked dice electrically, allowing the integration of multiple, smaller dice—each processed using an optimal technology—within a package. Many memory manufacturers are already creating 3-D die-stacked chips in production quantities (Figure 1), and ...

Full article: http://www.electronics-lab.com/blog/?p=20691

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