The AI chip boom is now straining the substrates chips are mounted on. Unimicron, a leading Taiwanese IC substrate maker, said on 20 October 2026 that lead times for some key equipment have stretched to 30 months, and warned that materials such as low-CTE glass fibre cloth and ABF could face
Unimicron, a leading Taiwanese IC substrate maker, reported on October 20, 2026, that lead times for some key equipment have extended to 30 months. The company also warned that critical materials like low-CTE glass fibre cloth and ABF could face a 20% supply shortfall in 2027. These constraints are occurring as demand for AI accelerators drives advanced packaging technologies.
Verified 2026-10-21
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Every advanced AI chip package sits on a substrate, so a materials gap there can cap AI chip output even when fabs and packaging lines have room.
More on Supply chain
- TrendForce says a shortage of critical optoelectronic components — EML and CW lasers — is reshaping the AI optical transceiver supply chain, and projects the global market to grow from $16.5 billion in 2025 to $26 billion in 2026, an AI optical transceiver market up more than 57% year-over-year
- Applied Materials agreed in October 2026 to raise its stake in Besi, the Dutch maker of chip assembly equipment, to about 20%
- Applied Materials' Semiconductor Systems segment — the deposition, etch and inspection tools chipmakers install before fabricating a single AI chip — reported fiscal third-quarter 2026 revenue up 26.5% year-over-year to $7.04 billion in Applied Materials' Semiconductor Systems segment revenue
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