Intel Details 18A-P Manufacturing Process Advancements

Intel disclosed further details about its 18A-P manufacturing process at the Hot Chips 2026 conference. According to the company, direct testing on production chips shows that the 18A-P process can achieve a 30% frequency increase at a low operating voltage of 0.5V. This enhanced process is slated for initial use in Intel's upcoming Diamond Rapids server processors and Nova Lake consumer processors.

The 18A-P process builds upon the existing 18A node by incorporating RibbonFET gate-all-around (GAA) transistors, backside power delivery, Power Boost technology, and additional metal layers. Intel reports that this results in over a 9% performance improvement at the same power consumption, or more than an 18% reduction in power consumption at the same performance level. Research conducted with Futurum Research Group indicates that 18A-P is not a minor adjustment but is optimized for different voltage ranges, focusing on energy efficiency at lower voltages and unlocking frequency potential at higher voltages.

Comparative tests using GAA transistors and backside power delivery against similar cores using FinFET technology at the same voltage demonstrated the 30% frequency gain at 0.5V. The backside power delivery moves the power delivery network to the rear of the wafer, reducing congestion and voltage drop on the frontside. This, combined with the enhanced control over threshold voltage provided by GAA transistors, offers performance benefits across both low and high voltage scenarios.

Intel has also improved thermal management for the 18A-P process, enhancing thermal conductivity by 50% and improving thermal resistance by 20% to 40% through material advancements and EDA-driven thermal design. Additionally, new, thicker metal layers at the top of the metal stack reduce interconnect delay and routing congestion, leading to frequency increases of approximately 3% at 1.1V and 2% at 0.65V, along with a 2% reduction in power consumption.

The Diamond Rapids processors, expected in 2027, will feature up to 256 cores and leverage the 18A-P process for both increased core counts and single-core performance. The Nova Lake processors will also utilize this technology, though a release date has not been specified. These advancements underscore Intel's strategy to push performance and efficiency boundaries in both the server and consumer markets.