IBM’s New Chip Design Could Reshape Future Processors

IBM has unveiled a new chip design it says could allow manufacturers to pack nearly 100 billion transistors onto a silicon chip the size of a fingernail, marking a potential breakthrough in the race to develop smaller and more powerful semiconductors.

The U.S. technology company said its new NanoStack architecture represents the equivalent of a 0.7 nanometre (nm) chip technology, which would make it one of the first publicly disclosed chip designs to move below the 1nm threshold.

Current leading-edge semiconductor production is centred around 2nm technology, with chipmakers including Taiwan Semiconductor Manufacturing Company, Samsung Electronics and Intel developing next-generation processes.

IBM said its prototype chip delivered 50% better performance than its own 2nm technology in tests and was 70% more energy efficient. However, the company said it would take several years before the technology could be ready for commercial production.

Jay Gambetta, director of IBM Research and IBM Fellow, described the NanoStack technology as a “landmark moment” for the future of chips.

“With our new NanoStack architecture, we’re not just making smaller transistors, we’re reinventing how chips are built to deliver dramatically more power and energy efficiency,” he said.

The development comes as semiconductor companies face increasing challenges in maintaining the decades-old trend known as Moore’s Law, which predicted that the number of transistors on a chip would roughly double every two years.

As chips become increasingly dense, engineers have shifted away from simply shrinking components horizontally and towards three-dimensional designs that stack transistors vertically.

IBM’s NanoStack approach involves layering transistor sheets on top of each other, creating a structure designed to increase computing power within the same physical footprint.

Professor Alan Woodward, a computer scientist at the University of Surrey, compared the approach to constructing high-rise buildings instead of expanding cities outward.

“IBM’s NanoStack is like proposing a 100-storey skyscraper,” he said, adding that rival 3D chip efforts from companies such as Samsung and Intel were closer to 30-50 storey buildings.

The technology still faces significant engineering hurdles, including managing heat generated by densely packed transistors and ensuring the components can reliably switch on and off when operating at extremely small scales.

“I think it’s fair to say IBM’s proposals are the most ambitious,” said Prof Woodward.

Transistors are the fundamental building blocks of modern semiconductor chips, powering devices ranging from smartphones and gaming consoles to the data centres that support cloud services and artificial intelligence applications.

The growing demand for AI computing has intensified competition among chipmakers to develop more efficient processors capable of handling increasingly complex workloads while reducing energy consumption.

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