A journey into the benefits, trade-offs and technical implications of moving to chiplets
Monolithic integration and chiplet architectures in current ASIC design
Monolithic integration has been the dominant paradigm since the rise of VLSI-based ASICs in the 1970s–1980s. In a monolithic design, all functional blocks of integrated circuits such as logic, memory, analog interfaces, and specialized accelerators, are integrated onto a single piece of silicon. This model offers a compact, tightly coupled architecture with well-established design and verification flows.
However, the continued scaling of transistor dimensions and the growing complexity of modern systems are pushing the limits of this approach. As chip areas increase and advanced process nodes become more expensive and yield-sensitive, fabricating all functionality on a single die introduces significant cost, risk, and inflexibility.
In the last 5–10 years, chiplet-based architectures have begun to gain meaningful traction. Rather than integrating all components onto one large die, this approach partitions systems into multiple smaller dies –chiplets– each optimized for a specific function. The chiplets are manufactured independently and later assembled into a single package using advanced interconnect technologies.
While chiplets promise flexibility, cost savings, time to market, and scalability, they also introduce new complexities. This article explores when and why it makes sense to transition to a chiplet-based design, and under what circumstances monolithic ASICs remain the better choice.