Silicon Wafer Demand Recovers Under the AI Boom: SEMI Expects Global Shipments to Grow 11.8% Year-on-Year in 2026

Under the AI boom, wafer demand recovers and the industry faces a major test Source: Bandao Zongheng Published: 2026-11-03 16:14 AI wafer foundry generated poster The ceiling on AI computing power depends not only on how small transistors can be etched, but also on how many sufficiently pure monocrystalline silicon ingots the world can pull.

In the story of AI computing power, GPUs and HBM are always the most closely watched protagonists. But when the gaze extends to the very upstream of the industrial chain, one finds that an unremarkable silicon wafer has long quietly begun its own repricing cycle.

According to the latest industry monitoring report released by SEMI, global silicon wafer shipments in 2026 are expected to grow 11.8% year on year; shipment volumes in each of the three consecutive years from 2027 to 2029 will hit record highs for the industry. Compared with the growth figures that the market can see at a glance, the industry recovery logic hidden in this SEMI report is the core content truly worth digging into.

This round of comprehensive recovery in wafer demand is completely different from the bottom rebounds in previous cycles; rather, it is the result of three forces acting in combination: massive absorption of advanced-process wafers by AI large models and computing chips, inventory replenishment that industrial chain manufacturers have started ahead of time based on prosperity forecasts, and a concentrated wave of capacity expansion and construction by wafer fabs around the world. Where these three forces converge, the core contradiction that has long existed in the wafer industry has also fully emerged: the explosive speed on the demand side far exceeds market expectations, while the supply side, like monocrystalline growth, is constrained by long-cycle processes and simply cannot be sped up through short-term expedited actions.

Historical data: the relationship between shipments and memory WIP

To accurately grasp the current recovery in wafer demand, it is worth first reviewing the industry's past demand trajectory. In the two cycles of 2018-2019 and 2022-2023, the rebound in wafer shipments was significantly earlier than the sharp climb in memory work-in-progress (WIP) inventory; and when memory WIP inventory touched a stage peak, the growth pace of wafer shipments slowed in sync immediately afterward. The logic behind this pattern is not hard to understand: when production lines are already running at full capacity, wafer fabs' purchasing demand for additional wafers will naturally weaken at the margin.

It is worth noting that there is an obvious positive correlation between process materials sales and wafer demand. This correlation not only reflects the increase in chip manufacturing complexity, but also means that the process materials consumed per wafer are increasing. However, while historical patterns provide a reference framework, this cycle has a unique variable: the number of production lines under construction and planned far exceeds that of the past.

(The historical leading and lagging relationship between wafer shipments and memory WIP inventory)

Wafer fab investment: extending the demand support cycle

Judging from the wafer fab investment outlook newly disclosed by SEMI, after 2026, semiconductor equipment spending planned across the industry will continue its growth curve. As long as the expansion investment plans of wafer fabs in various regions are implemented basically according to the original schedule, the equipment installation and commissioning and the gradual capacity ramp-up process spanning the following years will continue to provide stable and solid demand support for the wafer market.

This report also points out a key trend that the market easily overlooks: the year-on-year growth gap between overall equipment spending by global semiconductor wafer fabs and spending on equipment dedicated to wafer manufacturing is continuing to widen. This "investment growth gap" means that the support this round of expansion provides to wafer demand, and its duration, will both be longer and stronger than initial market expectations.

This also explains why the historical linkage pattern between past wafer shipment trends and WIP inventory does not necessarily point to an imminent node of industry slowdown. Wafer purchasing momentum may weaken before WIP inventory peaks, but as long as investment support remains, the inflection point of demand decline will be postponed.

(The investment growth gap between semiconductor equipment and wafer equipment; the signal points to a postponement of the slowdown in this wafer cycle)

The next test: inventory digestion capacity

SEMI expects global wafer shipments to continue growing in 2027, but the growth rate will narrow significantly from 11.8% in 2026, entering a more moderate growth range. As precautionary inventory replenishment gradually recedes, sustained production activity will become the key to maintaining demand.

If the planned capacity expansion is implemented as scheduled and downstream customers can fully absorb the chips produced by the new capacity, semiconductor manufacturers can gradually digest the wafer inventory accumulated earlier while maintaining the existing purchasing pace. Conversely, if expansion investment is delayed, or end-market semiconductor demand weakens, it will not only slow the pace of inventory digestion but also significantly increase the risk of a decline in wafer orders.

AI-related investment is undoubtedly the key support for this round of demand, but the broader semiconductor recovery remains uneven. Therefore, the key to sustaining demand growth lies in how quickly wafer fabs can digest the wafers purchased ahead of time. This digestion speed will directly determine the duration of this recovery and the depth of subsequent wafer inventory adjustments.

From the perspective of historical cycles, wafer shipments have always slowed ahead of memory inventory peaks. But what is special about this cycle is that the investment support brought by a large number of newly built wafer production lines is lengthening the demand cycle. The 11.8% annual growth is only the starting point; the real test is whether inventory can be continuously digested. This not only determines the order visibility of wafer manufacturers, but also reflects the progress of the entire semiconductor industrial chain's transition from "AI standing out alone" to "broad recovery."

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