Why Is High-Purity Quartz Essential for Semiconductor Equipment?

High-Purity Quartz: A Critical Consumable Amidst the Shift to Advanced Manufacturing Processes

As the global semiconductor industry advances toward more sophisticated manufacturing processes, the demands for equipment performance, cleanliness, and process stability in chip fabrication continue to rise. Key stages of wafer manufacturing—ranging from diffusion, oxidation, and etching to CVD (Chemical Vapor Deposition) deposition—rely heavily on a vital fundamental material: high-purity quartz.

As a key component among semiconductor equipment consumables, high-purity quartz products are widely used in critical parts such as diffusion furnace tubes, quartz boats, quartz rings, quartz cleaning tanks, and quartz bell jars; their performance directly impacts wafer yield and production efficiency.

Why has high-purity quartz become the material of choice for the semiconductor industry?

1. Ultra-high purity ensures an optimal chip manufacturing environment

Semiconductor manufacturing is extremely sensitive to metal ions and impurities. Even trace amounts of contamination can lead to wafer defects or even the scrapping of entire batches of products.

High-purity quartz materials are typically manufactured from high-purity natural quartz sand or synthetic quartz. With an SiO₂ content exceeding 99.99% and extremely low levels of metal impurities, they meet the rigorous requirements for ultra-clean environments in semiconductor production.

2. Excellent high-temperature resistance

During chip manufacturing, temperatures for oxidation, diffusion, and annealing processes often exceed 1000°C.

High-purity quartz features:

• A softening point of approximately 1730°C
• A continuous operating temperature capability exceeding 1100°C
• An extremely low coefficient of thermal expansion

It maintains a stable structure even under conditions of frequent heating and cooling, resisting deformation or cracking.

3. Superior corrosion resistance

Semiconductor processes frequently utilize chemical reagents such as nitric acid, hydrochloric acid, and sulfuric acid.

High-purity quartz exhibits excellent corrosion resistance against the vast majority of acids. It is suitable for long-term use in wet cleaning equipment and chemical processing systems, effectively extending the service life of the equipment. 4. Excellent Optical and Electrical Properties

Quartz materials possess outstanding ultraviolet (UV) transmittance and electrical insulation properties. They are widely used in photolithography, inspection, and specialized process equipment, providing a reliable foundation for high-precision manufacturing.

Common Quartz Products in Semiconductor Equipment

Driven by the growing demand for advanced packaging, AI chips, and power semiconductors, the application of quartz products in semiconductor equipment continues to expand.

Key products include:

• Quartz Furnace Tubes

Used in diffusion furnaces, oxidation furnaces, and LPCVD equipment; these are core components for high-temperature processes.

• Quartz Boats

Used for wafer handling and transport; they require high dimensional precision and excellent cleanliness.

• Quartz Rings

Widely used in etching and deposition equipment to provide sealing and protection.

• Quartz Tanks

Used for wafer wet cleaning and chemical processing.

• Quartz Bell Jars

Used in vacuum and plasma equipment to provide a stable processing environment.

AI and Advanced Process Nodes Drive Continued Growth in Quartz Demand

In recent years, the rapid development of artificial intelligence (AI), high-performance computing (HPC), new energy vehicles, and data center construction has fueled the expansion of the global semiconductor industry.

Simultaneously, the evolution of process nodes from 14nm to 7nm, 5nm, and beyond has placed higher demands on high-purity quartz products:

* Higher purity

* Stricter dimensional tolerances

* Longer service life

* Superior thermal shock resistance

Industry analysts project that global investment in semiconductor equipment will remain high in the coming years, leading to continued growth in the market demand for high-purity quartz materials.

Conclusion

As indispensable consumables for semiconductor manufacturing equipment, high-purity quartz materials have become vital foundational materials supporting the development of advanced process nodes, thanks to their ultra-high purity, high-temperature resistance, corrosion resistance, and excellent stability.

As the global chip industry continues to upgrade, high-end quartz products will play an increasingly important role in the localization of semiconductor equipment and the development of global supply chains. For quartz product manufacturers, continuously improving material purity, machining precision, and technological innovation capabilities will be key to securing a competitive advantage in the future market.