3D ICs and Chiplets Emerge as Moore's Law Slows
As traditional transistor scaling slows, the semiconductor industry is increasingly turning to 3D ICs and chiplets to improve performance and compute density. Six critical trends are reshaping 3D IC design, including the need to manage system complexity, thermal challenges, and the rapid scaling of AI compute. This "scale up" approach is becoming a mainstream solution for building powerful, complex systems.
- The move to chiplets and 3D ICs is a direct response to the slowing of Moore's Law, which originally observed that the number of transistors on a microchip doubles roughly every two years. This rate has slowed, pushing the industry towards new methods like stacking specialized chiplets to continue performance gains. - Major technology companies like Intel, AMD, Apple, and NVIDIA are heavily invested in chiplet technology. For instance, AMD utilizes chiplet designs in its Ryzen and EPYC processors, while Apple incorporates them into its M-series chips to enhance performance and energy efficiency. - One of the primary advantages of chiplets over a single large monolithic chip is improved manufacturing yield. By breaking a large design into smaller chiplets, the impact of a single defect is localized, potentially increasing the number of usable chips from a silicon wafer. - The global market for processors using chiplets is projected to grow significantly, with one forecast predicting a rise to $5.8 billion in 2024 and a longer-term projection of $57 billion by 2035. The broader 3D-IC packaging market is expected to reach approximately $32.9 billion by 2030. - A significant challenge in 3D IC design is thermal management; stacking multiple active components increases power density and the risk of overheating. This requires advanced cooling solutions and careful design to dissipate heat effectively. - The complexity of integrating multiple chiplets introduces new design challenges, blurring the lines between chip design, package design, and board design. This has led to the development of new electronic design automation (EDA) tools and methodologies, including the use of AI to manage the vast number of design variables. - Heterogeneous integration is a key benefit of chiplets, allowing for the combination of components manufactured using different process technologies into a single package. This enables designers to use the optimal process for each function, such as logic, memory, and I/O. - The U.S. Department of Defense's research agency, DARPA, is actively promoting chiplet adoption through its Common Heterogeneous Integration and IP Reuse Strategies (CHIPS) program, aiming to establish a U.S.-based ecosystem for heterogeneous packaging.
