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Can AR Glasses Really Save the SiC Industry?

Silicon Carbide (SiC), once hailed as the “rising star” of semiconductor materials, has enjoyed tremendous momentum over the past few years. Thanks to its superior performance in high-voltage and high-power applications—such as electric vehicles and photovoltaic energy storage—it quickly became a favorite among investors and industry players.

However, as we entered 2025, cracks began to appear beneath the surface of this booming sector. The industry is now facing uncomfortable realities: overcapacity, intense competition, and aggressive price wars. The restructuring of Wolfspeed, a global leader, has further cast a shadow over the future of the SiC market.

Amid this uncertainty, AR (Augmented Reality) glasses have emerged as a new narrative—one that many believe could revive the struggling SiC industry.

But the real question is:
Are AR glasses a true savior, or just a passing cloud?

Why Does SiC Need “Saving”?

Silicon has long dominated the semiconductor world, accounting for over 90% of all devices. Its abundance, low cost, and mature processing technologies make it the default material choice.

Yet, silicon has clear limitations—especially in high-frequency and high-power applications. Its performance deteriorates under high voltage and frequency conditions, making it increasingly inadequate for modern demands such as electric vehicles, high-speed rail, and advanced power systems.

This is where SiC stands out.

With its wide bandgap, SiC devices can withstand extremely high voltages. Its high thermal conductivity ensures better heat dissipation, while its high electron mobility supports faster switching speeds and improved energy efficiency.

These advantages have made SiC indispensable in fields like:

• Electric vehicles (especially 800V platforms)
• Renewable energy inverters
• Data center power systems
• Satellite communications and power grids

Driven by this promise, the industry entered a massive expansion phase. In 2024 alone, 14 new 8-inch SiC fabs were built globally. In China, over 50 expansion projects were launched in 2023, with total investments exceeding RMB 90 billion.

But supply quickly outpaced demand.

The EV market—which accounts for over 70% of SiC demand—did not grow as fast as expected. As a result, procurement slowed, inventories piled up, and the market descended into a brutal price war.

The situation became paradoxical:

“The more you sell, the more you lose.”

The SiC industry now urgently needs new demand drivers to absorb capacity and restore profitability.

AR Glasses: A Strategic Pivot for SiC

Augmented Reality (AR) glasses are emerging as a critical interface between digital and physical worlds. At the heart of these devices lies the optical waveguide, responsible for transmitting virtual images while maintaining real-world transparency.

However, traditional waveguide materials face several limitations:

• Restricted field of view (FOV)
• Optical dispersion and stray light issues
• Trade-offs between thermal management and lightweight design

This is where SiC introduces a breakthrough.

When used in waveguide lenses, SiC delivers remarkable improvements:

• High refractive index (2.65–3.2) → enhanced image quality
• Ultra-low optical loss (<0.1 dB/cm) → clearer visuals
• Excellent thermal conductivity → reduced overheating
• Ultra-thin form factor (~0.55 mm) → lighter devices
• Wide field of view (>45°) → immersive experience

In short, SiC effectively solves many of the bottlenecks of traditional glass-based waveguides.

As a result, an SiC-driven AR optical ecosystem is rapidly taking shape, with both AR hardware companies and substrate manufacturers actively investing in this direction.

Reality Check: Savior or Supplement?

Despite the excitement, we must take a closer look at the numbers.

A common misconception is that each pair of AR glasses requires an entire SiC wafer. In reality, the structure is quite different:

• The waveguide component is only a small central area (typically ~35mm × 25mm)
• The main lens is still made from glass or polymer materials
• A single SiC wafer can produce multiple waveguides

Even under optimistic assumptions:

• One 6-inch wafer produces only 2 pairs of glasses (conservative estimate)
• By 2027, annual AR shipments using SiC may reach 500,000 units
• This translates to ~250,000 wafers per year

Compare that to China’s over 4 million wafers/year capacity (2025)—the gap is obvious.

Even in the best-case scenario, AR demand is too small to absorb the massive oversupply.