Global semiconductor foundry industry: UBS lifts N2 demand and capacity expectations as AI compute accelerates, while calling a 2027-28 mature-foundry upcycle

Overview

UBS argues that AI-related compute demand has materially enlarged the market for leading-edge foundry capacity while supply-demand conditions in mature nodes are improving. The report raises its N2, N3, TSMC capacity and capital-expenditure forecasts and expects stronger earnings upside across selected foundries in 2027-28.

Core views

UBS's bottom-up N2 demand analysis raises its 2028E foundry TAM to 320kwpm, from approximately 230kwpm a year earlier. The revision is driven mainly by stronger server CPU demand and accelerating AI-compute deployments, including a growing number of ASIC programs reaching volume production alongside GPUs. UBS also expects Intel to shift a larger portion of PC CPU output to 18A as execution improves. By 2028E, UBS estimates server CPUs and accelerators will represent 54% of N2 foundry demand, versus its previous 44% estimate; PCs should contribute 19% and smartphones/tablets 26%. UBS sees this larger opportunity supporting robust TSMC revenue growth through 2028-29E despite modestly greater competition from Samsung Foundry, Intel and Terafab. To meet the higher demand outlook, UBS lifts its end-2028 industry N2-capacity estimate to 312kwpm from 230kwpm previously. It now forecasts TSMC N2 capacity of 210kwpm in 2028, up from its prior 160kwpm forecast, while Intel is expected to exceed 60kwpm for internal CPU production, versus the previous 40kwpm estimate. UBS also increases its 2028 N3 capacity forecast to 290-300kwpm from 270kwpm, entirely because of faster TSMC expansion amid stronger cloud-AI demand in 2027-28E. TSMC's A14 node is expected to enter mass production in 2028, with UBS estimating roughly 60kwpm of A14 capacity that year as customer engagement grows and expansion is pulled forward. Reflecting the accelerated leading-edge build-out, UBS raises its TSMC capex forecast to US$90bn in 2027 and US$105bn in 2028, from US$63bn this year. UBS also maintains its earlier, anti-consensus view that mature foundries are entering an upcycle driven by industry-wide supply and resource reallocation. Utilization and pricing trends improved through 2026, and UBS expects more meaningful earnings upside in 2027-28. Its updated model has 8-inch foundry utilization rising to 95.1% in 2027 from 85.4% in 2026, supported by growing server PMIC demand. Although 12-inch 28/40nm demand faces near-term pressure from weaker smartphones and consumer electronics, modest capacity growth supports an expected utilization increase to 88.1% in 2027 from 84.3% in 2026. UBS expects Chinese foundries to remain rational competitively into 2027 as major participants direct more capital toward leading-edge technology. For stocks, UBS reiterates Buy on TSMC and expects further upward revisions to Street revenue, EPS and capex estimates for 2027-28. Within mature foundries, it identifies UMC as its top pick because it should benefit from overflow from larger foundries, with additional upside from silicon photonics and advanced packaging. UBS also likes PSMC and SMIC, while remaining Neutral on GlobalFoundries, Vanguard and Hua Hong.

Analysis framework

UBS combines a bottom-up application analysis of N2 wafer demand with capacity forecasts by foundry and node. It then models mature-node supply, demand and utilization, linking tighter utilization and rational capacity behavior to pricing and earnings implications, and uses valuation comparisons including P/E, P/BV and ROE for the covered foundries.

Methodology notes

• Industry AnalysisSupply-demand framework

  Foundry supply-demand and utilization modelling

  UBS forecasts wafer demand and installed capacity across leading-edge and mature nodes, then uses the balance between supply and demand to assess utilization, pricing and earnings conditions.

• Industry AnalysisUpstream-Midstream-Downstream Transmission

  Application-driven demand analysis

  The report traces demand from server CPUs, AI accelerators, ASICs, PCs, smartphones and PMICs into wafer demand for N2 and mature foundry nodes.

• Valuation methodsPB valuation

  P/BV versus ROE comparison

  UBS compares trailing-edge foundries using price-to-book multiples and return on equity, including 2027E P/BV against average 2027-29E ROE.

• Valuation methodsP/E and PEG Valuation

  P/E comparison

  The valuation tables compare forecast P/E multiples across foundry companies alongside earnings-growth expectations.

Asset mapping & comparison

Structured mapping from thesis to named assets (strengths, weaknesses, peers, risks).

• TSMC (2330.TW)

  Primary beneficiary of the enlarged N2, N3 and A14 opportunity

  Strengths

  Expected N2 capacity of 210kwpm in 2028, faster N3 expansion, and A14 mass production in 2028.

  Comparison

  UBS expects TSMC to remain the industry's major foundry supplier despite modestly increasing competition.

  Risks

  Competition from Samsung Foundry, Intel and Terafab increases modestly.

• UMC (2303.TW)

  UBS's top mature-foundry pick

  Strengths

  Expected to benefit from overflow from larger foundries, silicon photonics and advanced packaging.

  Comparison

  Positioned as UBS's preferred mature-foundry name.

  Risks

  Mature-node demand remains exposed to smartphone and consumer weakness.

• PSMC (6770.TW)

  Favored mature-foundry exposure

  Strengths

  UBS likes the company within its mature-foundry view.

  Comparison

  Rated Buy alongside UMC and SMIC.

• SMIC (0981.HK)

  Favored mature-foundry exposure

  Strengths

  UBS likes the company and expects Chinese foundry competition to remain rational into 2027.

  Comparison

  Rated Buy alongside UMC and PSMC.

• GlobalFoundries (GFS.US)

  Covered foundry company

  Comparison

  UBS remains Neutral, unlike its Buy-rated preferred names.

• Hua Hong (1347.HK)

  Covered foundry company

  Comparison

  UBS remains Neutral, unlike its Buy-rated preferred names.

• Vanguard (5347.TWO)

  Covered foundry company

  Comparison

  UBS remains Neutral, unlike its Buy-rated preferred names.

Key data

• N2 foundry demand TAM, 2028E320kwpmRaised from approximately 230kwpm a year earlier.
• Server CPUs and accelerators share of N2 demand, 2028E54%Raised from UBS's previous 44% estimate.
• Industry N2 capacity, end-2028E312kwpmRaised from 230kwpm previously.
• TSMC N2 capacity, 2028E210kwpmRaised from UBS's prior estimate of 160kwpm.
• Intel N2/18A capacity, 2028EMore than 60kwpmFor internal CPU production, versus UBS's previous 40kwpm forecast.
• Industry N3 capacity, 2028E290-300kwpmRaised from 270kwpm, driven entirely by faster TSMC expansion.
• TSMC A14 capacity, 2028EApproximately 60kwpmUBS estimate for the year A14 enters mass production.
• TSMC capex forecastUS$90bn in 2027; US$105bn in 2028Up from US$63bn this year.
• 8-inch foundry utilization, 2027E95.1%Up from 85.4% in 2026E.
• 12-inch 28/40nm utilization, 2027E88.1%Up from 84.3% in 2026E.

Impact & implications

UBS believes higher AI-led leading-edge demand should support TSMC's revenue growth and prompt upward revisions to 2027-28 Street revenue, EPS and capex estimates. In mature nodes, improving utilization, pricing and supply discipline underpin its expected earnings upside, with UMC viewed as the principal beneficiary of larger-foundry overflow.

Risks

• Semiconductor demand is cyclically sensitive to macroeconomic conditions.
• Weaker smartphone and consumer demand could pressure near-term 12-inch 28/40nm demand.
• Foundry companies operate in a highly competitive market where product innovation and R&D investment are critical.

What to watch

• The ramp of server CPUs, GPUs and ASIC programs, which underpins the higher N2 demand forecast.
• TSMC's pace of N2, N3 and A14 capacity expansion and its capital-expenditure trajectory.
• Cloud-AI demand in 2027-28 and its effect on N3 capacity needs.
• 8-inch and 12-inch mature-node utilization and pricing trends.
• Whether Chinese foundries maintain rational competitive and capital-allocation behavior into 2027.