IBM claims world’s first sub-1 nanometer chip technology (arstechnica.com)

IBM has unveiled what it claims to be the world’s first sub-1 nanometer chip technology, marking a significant advancement in semiconductor design. This new chip architecture achieves nearly 100 billion transistors on a chip no larger than a human fingernail, effectively doubling the transistor density from the previous generation. This leap, described by Jay Gambetta of IBM Research as “not just an incremental step,” promises enhanced compute performance and improved energy efficiency essential for AI data centers. The term "sub-1 nanometer" refers to IBM's innovative "nanostack" architecture, which allows for performance improvements akin to hypothetical chips with features smaller than 1 nanometer—something currently constrained by physical limitations. IBM's chips are built at the newly defined 0.7-nanometer (7 angstrom) node, a term reflecting performance rather than actual feature dimensions. This breakthrough indicates a future where computing power grows significantly without a proportional increase in energy consumption, providing vital capabilities for the ever-expanding demands of AI and machine learning technologies.