A Shift from On-Demand Orders to Locked Capacity
The global PCB industry is undergoing a deep supply change in 2026. Samsung Electronics and SK Hynix are raising output to meet AI demand. This move pushes semiconductor supply competition into packaging substrates. Long-term agreements, or LTAs, are replacing on-demand substrate orders. These deals can lock in one year of supply ahead of time.
A PCB industry source described the shift clearly. “En el pasado, customers ordered what they needed. Now they sign long-term agreements. They book a year of usage in advance to secure supply.” This change shows a structural reversal in the ABF substrate market. It has moved from a buyer’s market to a seller’s market.
How Large Is the Gap? Numbers from Authoritative Sources
Counterpoint Research predicts that the ABF substrate supply gap will reach about 20% por 2027. The same firm says new capacity may not arrive until 2027. Counterpoint also estimates that one AI semiconductor uses about 10 times more substrate material than a standard PC semiconductor.
Ajinomoto public data helps explain this gap. High-performance AI packaging substrates are about 3.5 times larger than traditional products. Layer counts can rise from 6 a 18. Combined, one high-end AI chip can use up to 10.5 times more ABF material than a traditional chip. AI chip shipments are growing. Substrate size and layer counts are also rising. Como resultado, capacity pressure keeps building.
Goldman Sachs offers a steeper view. It estimates ABF substrate shortfalls of 14%, 34%, y 51% from late 2026 a través de 2028. These figures differ from Counterpoint’s forecast. Sin embargo, both sources point in the same direction. Shortages are getting worse, not better.
The Choke Point in Upstream Materials
Substrate demand now pressures the raw material supply chain. Abf, or Ajinomoto Build-up Film, serves as a core insulating material in advanced substrates. Larger substrates and higher layer counts require more repeated material stacking. Yet global ABF film supply is highly concentrated. Ajinomoto holds about 95% of the market. Only a few suppliers serve the market.
En 2026, Ajinomoto notified mainland China customers that it would cut ABF film supply by 30%. The company also introduced a new price system. Prices could rise by up to 30%. ABF film lead times have stretched beyond six months. Customers have booked some capacity through 2027. Substrate makers must now secure raw materials early to support rising output.
This material shortage is spreading across the broader PCB supply chain. En 2025, analysts expected China’s AI server shipments to exceed 1.5 millones de unidades. Demand for high-end PCBs grew 85% year over year. High-end material capacity needs 12 a 18 months to release. Copper foil prices rose about 15% from early 2025. They reached USD 9,400 a 9,800 per ton. Epoxy resin and fiberglass cloth also tightened.
Equipment Lead Times: The Underestimated Bottleneck
Equipment lead times may worry buyers even more than materials. PCB makers are expanding capacity. This expansion raises demand for tools across the whole production flow. Yet equipment suppliers cannot scale fast enough.
One equipment industry source said, “New tools such as lithography equipment, substrate inspection, and repair systems have lead times near two years. Even shortened delivery takes about 18 meses. At minimum, buyers wait 12 months.” Goldman Sachs reports an even sharper shift. Orders for mid- and high-end ABF vacuum lamination equipment have moved from 2028-2029 a 2031. Some top customers now offer premiums to secure earlier delivery. This behavior did not appear in the 2020-2022 semiconductor boom.
Long equipment lead times limit substrate capacity expansion. They also create a negative feedback loop. Capacity expansion raises equipment demand. Longer lead times delay capacity release. This loop pushes the supply gap further into the future.
Hidden Barriers in High-Standard Manufacturing
Quality standards add another constraint that buyers often overlook. High-layer, large-size AI packaging substrates demand extreme process precision and reliability. Yield ramp time directly erodes nominal capacity.
Por ejemplo, IPC-6012F sets stricter testing rules for stacked microvias. Clase 3 products with 3+ stacked microvias require IST, or Interconnect Stress Testing. Three-layer stacks need at least 750 ciclos. Four-or-more-layer stacks need at least 1,000 ciclos. Rev E required 500 ciclos. The standard also tightens fill quality. Maximum dimple for stacked structures drops from 15 micrometers to 10 micrómetros. IPC introduced these changes to address field failures in deep stacked microvias.
IPC-6012F also tightens thermal cycling requirements. For Class 3 and Class 3/A boards, resistance change after thermal cycling must not exceed 5%, abajo de 10%. Minimum copper thickness in plated through-hole walls rises from 25 micrometers to 28 micrómetros. For AI packaging substrates, these rules are not just entry barriers. They are core yield challenges. A tiny process deviation can scrap an expensive AI chip during packaging.
For PCBA buyers, UL 796 and IPC-A-610 remain key references. UL 796 covers printed wiring board safety. IPC-A-610 defines assembly acceptance criteria. These standards help buyers compare PCB and PCBA suppliers on a common basis.
Sourcing Strategy Evolution: From LTAs to Joint Investment
Downstream customers are changing how they buy. Industry sources say NVIDIA, AMD, and cloud service providers have locked ABF substrate LTAs through 2028. Yet customers still worry about material shortages. Some now ask substrate makers to plan 2029-2030 expansions. The co-investment model from 2021-2022 has returned. Customers directly consign tools, prepay for equipment, or share fab costs. In return, they seek priority supply.
LTAs themselves are evolving. Growth Research notes that recent LTAs no longer only extend contract terms. They now combine minimum purchase volumes, price floors and ceilings, prepayments, and take-or-pay clauses. This model turns substrate supply from cyclical purchasing into order-based supply. It reduces uncertainty for both sides. Sin embargo, it also demands stronger cash positions and better demand forecasting from buyers.
For procurement teams seeking a reliable PCB or PCBA supplier, the key question is broader than capacity. Buyers must assess upstream material access and equipment readiness. In a tight ABF substrate market, material and tool access decide whether a PCB supplier can meet delivery promises. For AI server PCB and ABF substrate supply options, contact leading suppliers with LTA capability. Request a PCB quote and compare PCBA sourcing plans before capacity tightens further.
Fuentes de datos
- Counterpoint Research - “From T-Glass Crisis to Capacity Erosion: The Multi-Year Substrate Shortage,” March 11, 2026.
- Goldman Sachs — Global PCB and CCL Industry Research, 2026.
- PCI — IPC-6012F: Especificación de calificación y rendimiento para tableros impresos rígidos, 2023.
- Ajinomoto — ABF Film Supply and Pricing Notice, Agosto 2026.
- Würth Elektronik Asia Production — Market Report, June 2025.
