Substrates & Interconnect
IC substrate and advanced PCB manufacturers. ABF substrates are the connective layer between chip and board — Ibiden holds near-monopoly on ABF substrate supply for leading-edge CPUs and GPUs. This layer was the hidden bottleneck of the 2021-2022 chip shortage.
Structurally undercovered. ABF substrate capacity is a multi-year constraint for AI chip volume — NVIDIA Blackwell, AMD MI300, Intel Meteor Lake all require Ibiden ABF. Low analyst coverage relative to strategic importance. Key differentiation within L9: Ibiden and Unimicron have lower consumer electronics exposure and higher AI server substrate exposure — making them preferred holdings vs Nan Ya PCB and Kinsus which carry more consumer end-market risk and face more revenue growth pressure through cycles.
ABF substrate capacity expansion underway but 18-24 month lead times mean supply remains tight through 2026-2027.
Single constituent — intra-layer correlation not applicable.
| TICKER | COMPANY | LAST | CHG% | β SPY | β SOXX | SIGNALS | TAGS | |
|---|---|---|---|---|---|---|---|---|
| IDBDY | Ibiden Co Dominant supplier of ABF (Ajinomoto Build-up Film) substrates used in virtually every high-end CPU a... | ... | ... | — | — | packaging_playai_infrastructurelong | ||
| UMICY | Unimicron Technology Major IC substrate and PCB manufacturer. Supplies substrates to TSMC packaging ecosystem and major f... | ... | ... | — | — | packaging_play | ||
| KINSF | Kinsus Interconnect Specialty IC substrate manufacturer focused on mobile and AI chip packaging.... | ... | ... | — | — | packaging_play | ||
| NYPBF | Nan Ya PCB Taiwan-based PCB and IC substrate manufacturer. Part of the Formosa Plastics group. Higher consumer ... | ... | ... | — | — | packaging_play |