Jim Keller

Atomic Semi, founded by chip architect Jim Keller and DIY fabrication pioneer Sam Zeloof, rebranded as Fab2 to emphasize its role as a 'fab fab'—a factory designed to mass-produce small semiconductor fabrication facilities. This startup addresses semiconductor manufacturing bottlenecks by decentralizing fab production, potentially lowering barriers to chip manufacturing and distributing supply chain risk.

Chip architect Jim Keller argues that memory bandwidth and communication efficiency, governed by Rent's Rule and Amdahl's Law, will be the limiting factors in AI infrastructure scaling rather than processor core count. This shifts semiconductor design priorities toward interconnect and memory systems, impacting chip roadmaps across the industry.