Moore's law#Beyond Moore

Moore's law#Beyond Moore refers to the period and the technological strategies pursued as the classical scaling predicted by Gordon Moore's observation approaches fundamental physical and economic limits. This phase, formally recognized by roadmaps like the International Technology Roadmap for Semiconductors (ITRS) and its successor, the International Roadmap for Devices and Systems (IRDS), emphasizes functional diversification and integration over pure dimensional scaling. The era is characterized by exploring novel materials, advanced packaging techniques, and entirely new computing paradigms to sustain progress in information technology performance and efficiency.

Physical and economic limits

The relentless miniaturization of CMOS transistors faces insurmountable barriers at atomic scales, where quantum effects like tunneling and short-channel effects degrade device reliability and increase static power dissipation. Economically, the cost per transistor, which historically decreased, has begun to rise at advanced process nodes like 5 nm and 3 nm, driven by the extreme complexity and capital expenditure required for EUV lithography systems from companies like ASML. Foundries such as TSMC, Samsung, and Intel confront diminishing returns, making the traditional Dennard scaling model obsolete. These constraints challenge the economic model of the global semiconductor industry and necessitate a strategic shift.

Alternative approaches to scaling

Instead of solely shrinking transistors, the industry focuses on 3D integration and advanced packaging to increase component density and performance. Technologies like through-silicon vias (TSVs) and chiplets allow heterogeneous integration, combining specialized dies from different process technologies into a single package, a approach championed by the UCIe consortium. Furthermore, More-than-Moore strategies emphasize adding functionality through non-digital technologies like MEMS, RF components, and photonic integrated circuits on the same substrate or within a system-in-package. This enables continued performance gains without relying solely on transistor scaling.

Emerging technologies

Research beyond conventional silicon explores novel materials and state variables for computation. Carbon nanotube transistors, graphene-based devices, and transition metal dichalcogenides offer potential for faster, more energy-efficient switches. Spintronic devices, which utilize electron spin, and memristors, capable of both logic and memory, are investigated for neuromorphic computing applications. For ultimate scaling, concepts like single-electron transistors and quantum computers, leveraging principles from quantum mechanics, represent a more radical departure, with efforts led by organizations like IBM, Google, and Intel Labs.

Industry and economic implications

The shift beyond Moore alters competitive dynamics and supply chains across the technology sector. The rising cost of fabs favors large players like TSMC, Samsung, and Intel Foundry Services, while increasing the strategic importance of equipment vendors like ASML, Applied Materials, and Lam Research. It also accelerates the trend toward vertical integration and fabless design, with companies like Apple, NVIDIA, and Advanced Micro Devices driving innovation through chiplet architectures and domain-specific accelerators. National initiatives, such as the CHIPS and Science Act in the United States and the European Chips Act, aim to secure leadership in this new technological landscape.

Societal and environmental considerations

The progression beyond Moore intersects with critical global challenges, including e-waste management and the substantial carbon footprint of chip manufacturing and data centers. New paradigms like neuromorphic and quantum computing could dramatically improve energy efficiency for specific tasks like AI training, potentially impacting climate goals. Furthermore, advances in bioelectronics and wearable sensors promise revolutions in personalized healthcare. However, these transitions also raise concerns about technological displacement, digital inequity, and the geopolitical tensions surrounding access to advanced semiconductor fabrication capabilities.

Category:Moore's law Category:Semiconductor industry Category:Emerging technologies