[Product/Technology] RF Microwave Generator–Driven Plasma for Semiconductor Processing

The semiconductor industry continues to expand with growing demand from AI, high-performance computing (HPC), 5G communications, and autonomous technologies. As these technologies advance, the need for higher computing performance and data processing capability continues to rise, accelerating the miniaturization and higher integration of semiconductor devices. This industry trend is placing greater emphasis on precise process control and a stable plasma environment in semiconductor manufacturing. (May & Sze, 2004; Lieberman & Lichtenberg, 2005) Plasma processes are used in a wide range of critical semiconductor manufacturing steps, including etching, thin-film deposition, and surface treatment, and they are key factors that directly influence process quality and yield. (Coburn & Winters, 1979)

Plasma Technology Based on RF Microwave Generators

Recently, plasma generation technology using RF microwave generators has gained attention as an alternative for high-precision semiconductor processing. RF microwave equipment delivers microwave energy into process gases to create a plasma state in which electrons and ions are generated, thereby enabling a variety of chemical reactions. In particular, microwave-based plasma offers high energy coupling efficiency and uniform plasma formation. (Lieberman & Lichtenberg, 2005) In addition, this approach can be implemented with low or no electrode dependence, which is advantageous in reducing process contamination and improving equipment lifetime.

Key Advantages of RF-Based Plasma

1. High Plasma Density: Microwave-based energy delivery enables the formation of high-density plasma, which plays an important role in fine-pattern processing. (Chen, 2016)
2. Process Stability: Stable plasma discharge minimizes fluctuations in process conditions and helps ensure uniform processing results.
3. Fine Plasma Control: RF power can be finely adjusted to precisely control plasma density and reaction conditions, which is essential for advanced semiconductor processes. (Lieberman & Lichtenberg, 2005)
4. Low Contamination: A low-electrode-dependence structure reduces metal contamination and particle generation, improving process cleanliness.
5. Process Efficiency: High energy transfer efficiency contributes to faster processing speed and optimized energy use.

Applications in Semiconductor Manufacturing

1. Plasma Etching

High-density plasma can be used to form fine patterns with precision and is particularly effective for etching high-aspect-ratio structures. This plasma etching technology has become one of the core technologies enabling semiconductor miniaturization. (Coburn & Winters, 1979)

2. Thin-Film Deposition (PECVD)

Plasma-enhanced chemical vapor deposition (PECVD) uses plasma to enable stable thin-film formation even at lower temperatures. RF microwave-based plasma can contribute to uniform film thickness and the formation of high-quality thin films. (Ohring, 2002)

3. Surface Treatment and Activation

Plasma-based surface activation is used to improve material adhesion, control surface energy, and enhance electrical properties. In particular, microwave-based plasma enables uniform surface modification, making it suitable for high-precision processes.

Importance of Stable RF Power Delivery

The performance of plasma processes depends heavily on the stability and precise controllability of the RF power source used to generate the plasma. A stable RF microwave generator plays a critical role in maintaining consistent plasma density, ion energy, and reaction uniformity, making it a key factor in ensuring process repeatability and equipment reliability. (Lieberman & Lichtenberg, 2005) In advanced semiconductor processes, where nanometer-level control is required, fine RF power tuning is considered essential.

Related RF Microwave Generator Products

Plasma technology based on RF microwave generators is expected to play an important role in next-generation semiconductor processing due to its advantages, including high plasma density, excellent process stability, and low contamination characteristics. In particular, as a technology capable of meeting the precise control requirements of fine-process and highly integrated semiconductor manufacturing, it is likely to become a core enabling technology in future semiconductor manufacturing equipment.

References

Lieberman, M. A., & Lichtenberg, A. J. (2005).
Principles of Plasma Discharges and Materials Processing (2nd ed.).
Wiley-Interscience.

Chen, F. F. (2016).
Introduction to Plasma Physics and Controlled Fusion.
Springer.

Coburn, J. W., & Winters, H. F. (1979).
Ion- and electron-assisted gas-surface chemistry—An important effect in plasma etching.
Journal of Applied Physics, 50(5), 3189–3196.

Ohring, M. (2002).
Materials Science of Thin Films (2nd ed.).
Academic Press.

May, G. S., & Sze, S. M. (2004).
Fundamentals of Semiconductor Fabrication.
Wiley.