Interposer
An interposer is a physical substrate or interface layer used in semiconductor packaging to connect multiple integrated circuits (ICs) or chiplets, enabling high-density and high-performance integration. It typically consists of silicon or organic materials with through-silicon vias (TSVs) or other interconnects that facilitate communication between components. This technology is crucial for advanced packaging techniques like 2.5D and 3D ICs, allowing for improved bandwidth, reduced power consumption, and smaller form factors in modern electronics.
Developers should learn about interposer technology when working on hardware design, semiconductor packaging, or high-performance computing systems, as it enables the integration of heterogeneous components like CPUs, GPUs, and memory in a single package. It is essential for use cases such as AI accelerators, data center servers, and mobile devices where performance and efficiency are critical, helping overcome limitations of traditional PCB-based interconnects. Understanding interposers is also valuable for roles in chiplet-based architectures, which are becoming increasingly common in the industry.