Stanford researchers are building layers of logic and memory into skyscraper chips that are smaller, faster, cheaper and taller. They have created a four-layer prototype high-rise chip in which the bottom and top layers are logic transistors. Sandwiched between them are two layers of memory. The vertical tubes are nanoscale electronic "elevators" that connect logic and memory, allowing them to work together to solve problems.
The circuit cards are like busy cities in which logic chips compute...
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