Key applications of advanced precision ceramics in semiconductor equipment: in-depth analysis of the properties of high-purity alumina, aluminum nitride and zirconium oxide

On top of the "crown" of modern industry, semiconductor manufacturing, every nanometer precision leap is inseparable from the underlying support of materials science. As Moore's Law approaches the physical limit, semiconductor equipment has increasingly stringent requirements for high purity, high strength, corrosion resistance, thermal stability and other properties. In this game of the micro world, advanced precision ceramics rely on their Excellent Its physical and chemical properties are moving from behind the scenes to the front, becoming an indispensable key cornerstone to support core processes such as etching (Etch), thin film deposition (PVD/CVD), photolithography (Lithography) and ion implantation.

1. Why do semiconductor equipment prefer precision ceramics?

The semiconductor manufacturing environment has been hailed as one of the “harshest working conditions on earth." In the reaction chamber, materials are subjected to strong acid and alkali chemical corrosion, high-energy plasma bombardment, and severe thermal cycling from room temperature to over 1000°C.

Traditional metal materials (such as aluminum alloys and stainless steel) are prone to physical sputtering in plasma environments, producing metal ion contamination, which directly leads to wafer scrapping; while ordinary polymer materials cannot withstand the outgassing effect in high temperatures and vacuum environments. Precision ceramics are known for their near-zero metal contamination, low linear expansion coefficient and outstanding Chemical inertness has become a key structural component of semiconductor equipment. core Select.

2. Performance game between high-purity alumina, aluminum nitride and zirconia

In the semiconductor field, different working conditions have different emphasis on ceramic materials. At present, high-purity alumina, aluminum nitride and zirconium oxide constitute the three pillars of the application system.

1. High purity alumina

As a widely used structural ceramic, semiconductor grade alumina usually requires a purity of 99.7% or even above 99.9%.

• Performance advantages: excellent electrical insulation, high mechanical strength and significant Resistant to fluorine-based plasma corrosion.

• Typical applications: The gas distribution plate (showerhead), ceramic bushing, and wafer handling robot arm in the etching machine.

2. “Thermal Management” important plan ”

Aluminum nitride plays a key role in scenarios that require frequent heating and cooling or high-power heat dissipation.

• Performance advantages: Its thermal conductivity (usually up to 170-230 W/m·K) is close to that of aluminum metal, and its thermal expansion coefficient (4.5 × 10⁻⁶/°C) is highly close to that of silicon wafers, which can effectively reduce wafer warpage caused by thermal stress.

• Typical applications: Electrostatic chuck (ESC) substrate, heater (Heater), and substrate packaging.

3. “Strong materials” in ceramics

Zirconia is known for its remarkably high fracture toughness among ceramic materials.

• Performance advantages: Good combination of hardness and toughness, wear resistance highlight , and has low thermal conductivity (suitable for heat insulation scenarios).
• Typical applications: Structural connectors, wear-resistant bearings, thermally insulating supports in vacuum environments.

3. Strive for excellence to empower core components

1. Electrostatic chuck (ESC), the “core carrier” of advanced manufacturing processes

In etching and ion implantation equipment, electrostatic chucks attract wafers through Coulomb forces. At its core is a multilayer structure made of high-purity aluminum oxide or aluminum nitride. Precision ceramics not only provide insulation protection, but also achieve precise control of wafer temperature (accuracy up to ±0.1°C) through internally embedded electrodes and cooling channels.

2. Etch the components inside the cavity to form a “barrier” against plasma

During the etching process, high-energy plasma will continuously bombard the cavity. Precision components using high-purity alumina or yttrium-based ceramic coatings can significantly reduce the particle generation rate. Experimental data shows that using high-purity ceramics instead of traditional materials can extend the equipment maintenance cycle (MTBC) by more than 30%.

3. Precision shift stage of photolithography machine, pursuing precise positioning

The photolithography machine's positioning accuracy requirement for the workpiece stage is at the sub-nanometer level. Ceramic materials with high specific stiffness, low thermal expansion, and high damping characteristics ensure that the stage is not easily deformed due to inertia or heat during high-speed movement, ensuring the alignment accuracy of exposure.

4. Independent innovation helps the future of the industry

He who observes the situation is wise, and he who controls the situation wins. Currently, the semiconductor industry is in a critical window period for technological iteration. Large size, integration, and localization have become inevitable trends in the development of the precision ceramics industry.

• Large size: Large-sized ceramic components adapted to wafers of 12 inches and above pose higher challenges to the molding and sintering processes.

• Integration: The integrated integration of structural parts and sensor heating functions is pushing ceramic components from single "mechanical parts" to "intelligent modules".

• Localization: Today, when supply chain security is of great concern, realizing independent control of the entire industrial chain from high-purity powder to precision processing has become the mission of the times for key enterprises in the industry such as Zhufa Technology.

Conclusion

Precision ceramics may seem cold and simple, but they actually contain the power to change the microscopic world. From the iteration of basic materials to the life optimization of core components, every technological breakthrough is a tribute to high-precision manufacturing.

As someone deeply involved in the field of advanced ceramics important strength, Zhufa Precision Ceramic Technology Co., Ltd. We always adhere to technological innovation as our core and are committed to providing high reliability, long-life precision ceramic solutions to semiconductor partners. We know that only by continuously pursuing quality can we live up to the important responsibilities entrusted by the times.

[Technical consultation and selection support]

If you are looking for information about High-performance ceramic chuck customization, plasma-resistant component solutions or advanced process material replacement For professional solutions, please contact Zhufa Technology. We will provide you with detailed material ICP-MS test reports, complex structural parts process evaluation and selection suggestions.