In the rapidly evolving world of power semiconductors, silicon carbide (SiC) has emerged as a transformative material, enabling devices that operate at higher voltages, temperatures, and frequencies than traditional silicon. This makes SiC critical for electric vehicles (EVs), renewable energy inverters, and industrial power supplies. However, manufacturing SiC devices presents unique challenges, particularly in the formation of a high-quality, reliable gate oxide layer. This critical step, known as thermal oxidation, requires specialized equipment capable of operating at significantly higher temperatures than standard silicon furnaces. The solution is the SiC high temperature oxidation furnace, a specialized piece of thermal processing equipment that is becoming essential for the volume production of next-generation power electronics.
Global Leading Market Research Publisher QYResearch announces the release of its latest report “SiC High Temperature Oxidation Furnace – Global Market Share and Ranking, Overall Sales and Demand Forecast 2026-2032.” This comprehensive study provides a data-driven analysis of a high-growth, specialized equipment market at the forefront of the wide-bandgap semiconductor revolution.
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https://www.qyresearch.com/reports/4429309/sic-high-temperature-oxidation-furnace
Market Overview: A Trajectory of Explosive Growth Towards US$224 Million
The numbers reflect the critical and rapidly expanding role of this specialized equipment. According to QYResearch’s latest data, the global SiC high temperature oxidation furnace market was valued at an estimated US$ 114 million in 2024. Looking ahead, the market is projected to reach a readjusted size of US$ 224 million by 2031, achieving a remarkable Compound Annual Growth Rate (CAGR) of 10.3% during the forecast period of 2025 to 2032.
This double-digit CAGR signals that this market is not merely growing, but is expanding in lockstep with the explosive demand for silicon carbide power devices across the automotive and industrial sectors.
Defining the Technology: Precision Thermal Processing for Wide-Bandgap Semiconductors
The semiconductor oxidation process is a core and fundamental step in device fabrication. Its purpose is to grow a high-quality, thin film of silicon dioxide (SiO₂) on the surface of a semiconductor wafer. In silicon devices, this oxide layer serves multiple critical functions, including gate dielectric in MOS (Metal-Oxide-Semiconductor) structures, surface passivation, and device isolation.
The process relies on an oxidation furnace, a precision thermal processing tool that exposes wafers to an oxidizing atmosphere (typically oxygen or water vapor) at carefully controlled high temperatures. The key challenge is to precisely control the process parameters—temperature, gas flow, and pressure—to ensure the grown oxide film has the exact required thickness, uniformity, and electrical quality (low interface trap density).
A SiC high temperature oxidation furnace is a specialized variant of this equipment, designed specifically to address the unique challenges of processing silicon carbide wafers. SiC, being a wide-bandgap material, requires significantly higher oxidation temperatures (typically 1200°C to 1400°C or even higher) compared to standard silicon (which oxidizes at 900°C to 1100°C). These furnaces are engineered to maintain exceptional temperature uniformity and purity at these elevated temperatures, enabling the growth of the reliable gate oxides essential for SiC MOSFETs and other power devices. Notably, these advanced systems often retain the capability to also process conventional silicon wafers, providing flexibility for research and production facilities.
In-Depth Market Analysis: A Concentrated Market Serving the SiC Boom
A thorough market analysis reveals that this market is highly specialized and is being driven by the global ramp-up of SiC device manufacturing capacity.
Segmentation by Type (Furnace Configuration):
- Vertical Oxidation Furnace: In this configuration, wafers are loaded vertically. Vertical furnaces are known for offering excellent temperature uniformity across the wafer batch and are often preferred for advanced, high-quality thermal processing. They can be more compact in terms of floor space.
- Horizontal Oxidation Furnace: The traditional configuration where wafers are loaded horizontally. Horizontal furnaces are often used for high-volume production and can be designed to process large batches of wafers simultaneously.
Segmentation by Application (Wafer Size):
- 4 Inch SiC Wafer: The market is currently transitioning from 4-inch to 6-inch wafers, but 4-inch remains a significant part of the industry, particularly for legacy products, research, and some high-voltage devices. Oxidation furnaces must be capable of handling this size.
- 6 Inch SiC Wafer: This is the dominant and fastest-growing segment for volume SiC device manufacturing. The transition to 6-inch wafers is critical for improving economies of scale and driving down the cost of SiC devices. New furnace installations are predominantly for 6-inch wafer processing.
- Others: This includes research and development on larger wafer formats (e.g., 8-inch), which is the next frontier for the SiC industry.
The Competitive Landscape:
The SiC high temperature oxidation furnace market is relatively concentrated, with key players including established semiconductor equipment suppliers and specialized firms. Leading companies in this space include Centrotherm, NAURA, Tystar Corporation, Toyoko Kagaku, CETC48, and Mattson Technology (now part of ASM International) , among others. These companies are partnering with SiC wafer manufacturers and device fabs to supply the critical thermal processing tools needed to ramp production.
Industry Development Trends: Higher Temperatures, Larger Wafers, and Process Control
Understanding the current industry development trends requires looking at the key forces shaping the future of this market.
- The Drive to 6-Inch and Beyond: The single most significant trend is the industry’s transition from 4-inch to 6-inch SiC wafers. This requires new furnaces capable of handling the larger wafer size while maintaining the extreme temperature uniformity and process control required for high-yield manufacturing. The next horizon is the development of 8-inch SiC wafer processing, which will demand even more advanced furnace technology.
- The Need for Higher Temperatures and Improved Uniformity: As SiC device designs evolve, the demand for even higher quality gate oxides is intensifying. This drives the need for furnaces capable of reaching and sustaining higher temperatures with even greater uniformity across the wafer and across the batch. Improved process control is essential to reduce interface state density and improve channel mobility in SiC MOSFETs.
- Process Integration and Automation: For high-volume manufacturing (HVM), oxidation furnaces must be integrated into fully automated factory lines. This requires advanced features for automated wafer handling, recipe management, and data collection for process control.
Exclusive Industry Insight: The Gate Oxide as the Heart of the SiC MOSFET
From my perspective, the critical role of the SiC high temperature oxidation furnace is best understood by considering its impact on the performance and reliability of the SiC MOSFET. The gate oxide layer in a MOSFET is its most sensitive and critical component. Its quality directly determines the device’s threshold voltage stability, channel mobility, and long-term reliability under stress.
For SiC, forming a perfect oxide is significantly harder than for silicon, due to the presence of carbon and the higher temperatures involved. The oxidation furnace is the tool that must overcome these challenges. It must not only grow the oxide to a precise thickness but also ensure that it has a minimal number of defects and interface traps. The furnace’s ability to control the ambient (e.g., using pyrogenic steam or nitrided oxides) and the precise thermal cycle is what determines whether the resulting devices will have the high performance and reliability demanded by automotive and industrial customers. This is why the furnace is not just a piece of equipment; it is a critical enabler of the entire SiC power device industry.
Industry Forecast: A Future of Sustained, High-Value Growth
Looking at the industry forecast through 2031, the path to over US$224 million is one of sustained, technology-driven growth. The 10.3% CAGR reflects a market that is riding the wave of one of the most significant transitions in power electronics—the widespread adoption of silicon carbide. As the EV market expands and the need for more efficient power conversion grows, the demand for SiC devices—and the specialized high temperature oxidation furnaces required to make them—will only intensify. The SiC high temperature oxidation furnace will remain a critical, enabling tool in the power semiconductor supply chain.
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