Domestic Semiconductor Equipment Validation in Advanced Nodes: Progress and Pathways

Introduction

Domestic semiconductor equipment has made notable strides in recent years, yet the journey from 'usable' to 'reliable' in advanced nodes (7nm and below) remains a critical challenge. This guide assesses the current verification progress of key equipment categories—lithography, etching, and thin film deposition—and analyzes the penetration rates within major domestic foundries. The focus is on understanding how fabs are integrating these tools amid capacity expansion plans and addressing the 'bottleneck' links that constrain supply chain resilience.

Lithography Equipment: Current Verification Status

For lithography, domestic deep ultraviolet (DUV) scanners have achieved initial validation in mature nodes (28nm and above), with several units running in production lines. However, for advanced nodes requiring extreme ultraviolet (EUV) technology, domestic alternatives are still in the early development stage. The current penetration rate in high-volume manufacturing for advanced logic and memory is below 5%, primarily due to resolution limitations and overlay accuracy challenges.

Key technical hurdles include source power stability, optics contamination control, and multi-patterning complexity. The verification cycle for a single lithography system in a 7nm process line can take 12–18 months, including defectivity screening and process window optimization. Iterations with mask and resist suppliers are essential to narrow the gap with incumbent vendors.

Etching Equipment: Penetration and Performance Metrics

Domestic etching tools have achieved higher penetration, especially in dielectric etching and some conductor etching steps. In 28nm and 14nm fabs, domestic etchers now account for approximately 20–30% of total etch chambers in selected facilities. For 7nm and 5nm, the penetration remains under 10%, as critical layers (shallow trench isolation, gate spacer) require extremely tight critical dimension (CD) control and sidewall profile consistency.

The verification process involves prolonged reliability testing and defect reduction campaigns. Challenges include gas distribution uniformity, plasma damage prevention, and endpoint detection accuracy. A typical verification cycle for a high-aspect-ratio contact etch step can exceed 24 months due to the need for across-wafer uniformity and particle control. Collaborative optimization with process engineers enables gradual replacement of etching steps in less critical layers first.

Thin Film Deposition Equipment: Progress and Integration

Domestic thin film deposition tools—both chemical vapor deposition (CVD) and physical vapor deposition (PVD)—have seen broad deployment in non-critical layers of advanced nodes. For atomic layer deposition (ALD), needed for high-k dielectrics and metal gate stacks, domestic suppliers are still catching up. Current penetration in advanced logic fabs is estimated at 15–20% for CVD/PVD, and below 5% for ALD.

Key barriers include film purity, step coverage uniformity on 3D structures (FinFET, gate-all-around), and wafer temperature control. The integration of ALD tools into a 7nm production flow requires extensive process qualification, often involving 30+ test wafers per film recipe and correlation with device electrical parameters (threshold voltage, leakage). The verification cycle typically spans 18–24 months, including reliability stress tests and multiple rework loops.

Foundry Expansion and Equipment Adoption

Major domestic foundries are aggressively expanding capacity: several 12-inch fabs targeting 28nm and 14nm are under construction, while advanced R&D lines for 5nm and 3nm are being set up. This expansion creates a dual need: immediate procurement for mature nodes and long-term qualification for future nodes. Foundries often adopt a tiered approach—deploying domestic equipment in less critical process steps (e.g., interlayer dielectrics, non-critical metallization) while keeping incumbent tools for critical layers. Over time, as reliability data accumulates, the usage gradually expands to more stringent steps.

To accelerate adoption, equipment makers are embedding inline metrology and advanced process control capabilities that allow real-time feedback. Collaborative joint-development programs (JDPs) between equipment suppliers and fabs reduce the qualification cycle by sharing test wafers and process parameters. However, the cultural shift from 'proven only' to 'proven enough' remains a subtle but significant barrier.

Pathways from 'Usable' to 'Reliable'

The transition from usable to reliable in bottleneck equipment requires three parallel strategies. First, robust co-optimization with materials and mask suppliers to tighten process windows. Second, systematic defect reduction campaigns using big data analytics from thousands of running wafers. Third, gradual replacement of single-chamber verification with multi-chamber fleet qualification that mirrors production line conditions.

Process verification cycle challenges are particularly acute for lithography and high-precision etch steps, where any deviation can cause yield loss across entire lots. Shortening these cycles without compromising rigor demands shared test chips, standardized reliability protocols, and government-backed consortiums that pool resources among multiple fabs. As of early 2025, several domestic equipment families have crossed the 90% yield threshold for their target process steps at 28nm nodes, while progress at 7nm is still measured in incremental yield improvement points. The next 3–5 years will be critical for bridging the gap to advanced nodes.

Conclusion

Domestic semiconductor equipment has achieved meaningful penetration in mature nodes and is gradually advancing into finer geometries. Lithography remains the hardest bottleneck, while etching and deposition show more promise due to a larger number of process steps that can be individually qualified. The verification cycle, often spanning 12–24 months per step, is the primary gating factor, but close collaboration between fabs and suppliers, combined with systematic process integration efforts, is steadily reducing the timeline. Achieving full self-sufficiency in advanced nodes will require sustained investment in fundamental science, precision engineering, and an ecosystem that embraces failure-correction loops.