Mature process nodes typically 28 nm and larger, including 40 nm, 55 nm, 65 nm, 90 nm and above remain the backbone for power-management ICs, display drivers, RF front-ends, automotive controllers, industrial sensors and a wide range of IoT devices.

While leading-edge capacity grabs headlines for AI accelerators, these older nodes continue to run high volumes of chips that every modern system still needs. The ten foundries below stand out for the scale, specialty platforms and recent capacity moves that keep this segment supplied in 2026.

TSMC

Even as the company pushes 2 nm and 3 nm, its mature-node footprint stays substantial. Fab 14 in Tainan and related lines continue to support 28 nm high-voltage, 40 nm RF-SOI and 55 nm embedded-flash flows used in automotive power management, 5G front-end modules and smart-card controllers. Monthly 28 nm wafer starts, once near 200 000, have been trimmed as equipment is redirected, yet Nanjing and certain Taiwan lines still run at full utilisation for weeks at a time.

Specialty platforms such as 40 nm BCD and ultra-low-leakage 22 nm remain in volume production for chargers, audio amplifiers and wireless-connectivity chips. The sheer number of qualified process variants and the long list of automotive and industrial customers keep TSMC central to the mature-node supply base even while advanced capacity expands.

Samsung Foundry

Samsung’s foundry unit balances advanced-node recovery with steady mature-node loading. 28 nm and 14 nm/8 nm lines handle display-driver ICs, power-management chips and selected automotive parts, while the company fills additional capacity with base dies for its own HBM stacks and external inference processors. Utilisation on the foundry side has improved into the mid-60% range by early 2026 as these mixed workloads take hold. The breadth of process options from bulk CMOS to specialised high-voltage flows allows Samsung to serve both internal system needs and external customers that still rely on cost-effective mature geometries rather than the newest FinFET or GAA nodes.

GlobalFoundries

GlobalFoundries has built its identity around differentiated mature and specialty platforms rather than pure leading-edge logic. Its Dresden and Singapore fabs run 22 nm FD-SOI, 28 nm SLP, 40 nm/55 nm BCDLite and RF-SOI flows that target automotive radar, mmWave 5G, IoT microcontrollers and power-management ICs. The Malta site adds 12 nm/14 nm FinFET capacity for higher-performance SoCs, while the Burlington facility specialises in SiGe BiCMOS and older 90–180 nm processes for RF and secure elements. With multiple 300 mm and 200 mm lines spread across the United States, Europe and Singapore, the company offers geographic diversity that many automotive and industrial customers value for supply-chain resilience.

United Microelectronics Corporation (UMC)

UMC concentrates almost exclusively on mature and specialty nodes after stepping back from leading-edge development. Its Taiwan and Singapore fabs deliver 22 nm ultra-low-power and high-voltage processes for display drivers, Wi-Fi/Bluetooth chips and OLED controllers, while 28 nm HKMG and embedded-flash lines support networking and consumer SoCs. 40 nm, 55 nm and 65 nm platforms remain workhorses for analog, mixed-signal and power devices. Utilisation on nodes above 14 nm has climbed into the mid-80% range by mid-2026, reflecting recovering demand from smartphone, PC and industrial customers. New 55 nm BCD platforms and continued 22/28 nm ramps position UMC as a reliable volume supplier for the chips that sit alongside AI processors rather than inside them.

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SMIC

As China’s largest pure-play foundry, SMIC has expanded 12-inch capacity focused on 28 nm and 40 nm nodes used in power-management ICs, consumer electronics and automotive controllers. Multiple sites in Shanghai, Beijing, Shenzhen and elsewhere contribute to monthly wafer output that has risen by tens of thousands of starts in recent years. Utilisation has stayed elevated often above 90% as domestic customers and some international buyers seek mature-node capacity while advanced lines remain constrained. The company’s ability to supply large volumes of these nodes has made it a key beneficiary of the shift of power and IoT chips toward regional manufacturing bases.

Tower Semiconductor

Tower specialises in high-value analog, RF, power and silicon-photonics processes that sit firmly in the mature-node domain. Its platforms include BCD, SiGe BiCMOS and RF-SOI flows running on both 200 mm and 300 mm wafers across fabs in Israel, the United States and elsewhere.

These technologies serve power-management, sensor interface and RF front-end applications that rarely require the latest logic nodes. Recent expansions, including activity in Japan, underline the continued demand for specialty mature capacity even when commodity CMOS lines face pricing pressure. The company’s process library offers multiple voltage and device options that let designers optimise for efficiency rather than raw density.

PSMC (Power chip Semiconductor Manufacturing Corporation)

PSMC operates primarily in the mature-node space, supplying logic, memory-related and specialty processes used in display drivers, power devices and consumer controllers. Its Taiwan facilities focus on cost-effective 40 nm-class and older geometries that remain essential for high-volume, lower-complexity chips. The foundry’s role is to absorb steady demand from applications that do not need advanced FinFET performance, thereby freeing leading-edge capacity elsewhere. Ongoing utilisation improvements reflect the broader recovery in mature-node loading driven by industrial and automotive restocking.

VIS (Vanguard International Semiconductor)

VIS, a specialist in mature and specialty processes, supplies power-management ICs, display-related chips and analog devices that benefit from the AI-driven demand for supporting silicon. Its Hsinchu operations run established nodes that deliver reliable yields for high-volume production. As a TSMC affiliate, VIS benefits from technology transfer and customer overflow, particularly for PMICs used in servers and data-centre power systems. The company’s focused process portfolio keeps it tightly aligned with the mature-node applications that continue to grow even as logic migrates to smaller geometries.

Hua Hong Semiconductor

Hua Hong has become one of the most tightly loaded mature-node foundries in China. Group utilisation exceeded 100% in mid-2026, with monthly capacity around 508 000 eight-inch-equivalent wafers. Its Shanghai and Wuxi fabs specialise in 40 nm, 55 nm and 90 nm processes for power semiconductors, specialty analog and discrete devices. A new 12-inch specialty line under construction in Wuxi is planned to add 55 000 wafers per month, expanding total output by roughly 30% once ramped. Orders in certain product categories have run at 1.5–2 times available capacity, underscoring the shortage of qualified mature-node supply for power and analog chips.

HLMC (Shanghai Huali Microelectronics Corporation)

HLMC contributes additional Chinese mature-node capacity, with process offerings centred on 28 nm, 40 nm and related specialty flows. Its fabs support domestic demand for logic, power-management and mixed-signal devices that form part of the broader localisation effort. Recent corporate moves, including capacity linkages with larger Chinese foundry groups, have integrated HLMC more closely into the regional supply network. The company’s wafer output helps fill gaps left when global leaders prioritise advanced nodes or face geographic constraints, ensuring that automotive, industrial and consumer applications continue to receive steady volumes of mature-process silicon.

Together these ten foundries illustrate the two-speed nature of the industry: advanced nodes race toward denser transistors while mature nodes quietly deliver the power, RF, analog and control chips that every system still requires. Capacity expansions, elevated utilisation rates and specialty platform development across 2025–2026 confirm that the mature process node wafer foundry segment remains both essential and actively evolving.