2D, 2.5D and 3D IC packages

2D, 2.5D and 3D IC packages

As semiconductor technology advances, IC packaging is evolving far beyond traditional layouts.

2D packaging is the conventional approach where chips are placed side by side on a PCB and interconnected externally. It is simple, cost-effective, and widely used in most electronic products.

2.5D packaging introduces a silicon interposer between chips, enabling high-speed communication with shorter interconnects and improved bandwidth. This approach is commonly used in AI accelerators, GPUs, and high-performance computing systems.

3D IC packaging takes integration further by stacking dies vertically using TSVs (Through-Silicon Vias). This reduces footprint, improves performance, lowers latency, and enables better power efficiency. It is becoming critical for next-generation AI, mobile, and data-center applications.

The future of electronics is moving toward heterogeneous integration, where multiple chiplets, memory, and processing units work together in advanced package architectures rather than relying only on monolithic silicon scaling.

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