IBM has unveiled a novel chip architecture that stacks transistor layers vertically, akin to a ‘block of flats’, promising a significant leap in computational efficiency. The announcement, made at the IEEE International Electron Devices Meeting, comes as the United Kingdom intensifies its push for semiconductor sovereignty.
The new design, which IBM calls vertical transport field-effect transistors (VTFET), effectively multiplies the density of transistors per square millimetre without the need for further miniaturisation of individual components. By orienting the current flow vertically, the chip can pack more processing power into a smaller footprint, reducing energy leakage and improving performance by up to 85% compared to conventional finFET designs.
For the British semiconductor industry, this breakthrough is timely. The UK recently launched its National Semiconductor Strategy, a £1 billion initiative aimed at bolstering domestic chip design and manufacturing. While the investment is modest relative to the £50 billion European Chips Act, it signals a recognition of semiconductors as a critical strategic asset. Dr. Alastair Wickham, director of the UK Semiconductor Institute, noted that VTFET could be a ‘game-changer’ for British companies seeking to specialise in high-efficiency chips for AI, quantum computing, and energy applications.
However, the geopolitical landscape complicates matters. IBM, a US-based company, is subject to export controls that restrict sharing of advanced chip technologies with certain countries. The UK, as a Five Eyes partner, may have preferential access, but the reality is that most cutting-edge fabrication remains concentrated in Taiwan, South Korea, and the Netherlands. The VTFET breakthrough underscores the widening gap between a handful of players with leading-edge capabilities and the rest of the world.
From a climate perspective, the shift to vertical transistors is promising. Data centres currently consume about 1% of global electricity, a figure that could rise sharply with AI deployment. VTFET chips could reduce power consumption per computation by an order of magnitude. But as Jevons paradox warns, efficiency gains often lead to increased usage, not absolute reductions. Without policy interventions, the ‘block of flats’ architecture may simply enable more energy-intensive workloads.
The UK’s strategic bet lies in leveraging its strengths in chip design and photonics, rather than attempting to rival TSMC or Intel in volume manufacturing. Companies like ARM and Graphcore are already positioned to exploit such innovations. Yet the talent pipeline remains a concern; physics and engineering graduates are increasingly lured by finance and software. The government’s recent push for STEM education will need to show results before the decade is out.
IBM’s announcement is a reminder that the semiconductor landscape evolves at a relentless pace. For Britain, the question is not whether to catch up in the impossible task of matching Taiwanese scale, but to know where to build high-rise expertise in the vertical niches that matter. The VTFET ‘block of flats’ may be a promising foundation, but the construction crew must be nurtured at home.
