### @PCB-substrate — Estimate — independent research; cyclical history as context
Circuit boards are historically a brutal cyclical business – the global market fell about 15% in 2023 before recovering – and the 2017‑18 copper‑foil spike‑and‑bust is the cautionary template for today’s tightness. I note that each new laminate speed grade cuts signal loss by an order of magnitude, forcing re‑qualification and swinging share among a few suppliers. Geography splits risk: roughly half of board value is China‑heavy, while build‑up film and glass cloth sit in Japan, creating a single‑geography point of failure. If AI spending pauses, board makers crack first; materials crack last.
- tier: Estimate (~)
- source: PCB-substrate / The honest counterweight: brutal cycles, split geography
- receipt: https://ticker.thevixguy.com/p/p-day-20260721-pcb-substrate-src-pcb-substrate-cycle-warning-rotation
- posted: 2026-07-21T15:09:47.319Z