Silicon Carbide Wafer (4H-SiC)

Description

1. Product Overview

The Silicon Carbide Wafer (4H-SiC) is a next-generation wide-bandgap semiconductor substrate engineered for high-power, high-frequency, and high-temperature applications. Primarily used in power electronics for EVs, renewable energy inverters, and industrial motor drives, its key value proposition lies in enabling superior energy efficiency, thermal management, and system miniaturization compared to conventional silicon. Strategically, 4H-SiC wafers are critical for global decarbonization efforts and the transition to 800V EV architectures, positioning them as a bottleneck-defining material in the $20B+ power semiconductor market.

2. Key Specifications & Technical Characteristics

• Chemical Composition: Single-crystal 4H polytype silicon carbide (SiC)

• Purity / Grade: Semiconductor grade – 99.9999% (6N) with controlled dopant concentration (N-type: Nitrogen, 1e18–1e19 cm⁻³; Semi-insulating: Vanadium-compensated, >1e10 Ω·cm)

• Physical Characteristics:

  • Diameter: 150mm (6”) and 200mm (8”) – production ready

  • Orientation: On-axis (0001) ±0.5° or off-axis 4° toward [11–20]

  • Thickness: 350 µm ±25 µm (6”), 500 µm ±25 µm (8”)

  • Micropipe density (MPD): <0.1 cm⁻² (zero micropipe grade available)

  • Bow/Warp: ≤30 µm / ≤50 µm

  • Surface finish: Double-side polished (DSP); Ra <0.3 nm (CMP)

• Packaging Options: Single-wafer FOUP cassettes (Class 10 cleanroom), nitrogen-purged vacuum-sealed inner packs, multi-wafer H-bar shippers

• Shelf Life: 24 months when stored at 20–25°C, <40% RH, in original nitrogen-sealed packaging

3. Core Industrial Applications

• Primary Industries: Automotive (EV traction inverters), renewable energy (solar PV, wind), industrial UPS/motor drives, RF power amplifiers (5G infrastructure), aerospace (more-electric aircraft)

• Specific Operational Use Cases:

  • EV main inverter modules (800V systems): reduces switching losses by >75% vs. IGBTs

  • High-voltage DC fast chargers (up to 350 kW): doubles power density while halving cooling needs

  • Solar string inverters: increases conversion efficiency from 98% to >99.2%, reducing LCOE

• Why It Performs Better: 3× wider bandgap (3.26 eV) enables 10× higher breakdown voltage; 3× higher thermal conductivity (370 W/m·K) allows passive cooling; 10× higher electron saturation velocity supports >100 kHz switching – directly translating to smaller magnetics, lighter heatsinks, and system-level BOM cost reduction of 15–20%.

4. Competitive Advantages

• Quality Consistency: 100% wafer-level automated optical inspection (AOI), 100% micopipe mapping per SEMI M55, and statistical process control (SPC) with Cpk ≥1.33 across all dimensions. Full traceability from ingot to die attach.

• Supply Reliability: Vertically integrated supply chain – in-house crystal growth (PVT), wafering, and CMP – with three geographically redundant manufacturing sites. Typical lead time: 8 weeks ARO for 150mm, 12 weeks for 200mm.

• Logistics Capability: Temperature-controlled global shipping via TAPA-certified carriers; real-time IoT-enabled tracking for high-value batches.

• Price Competitiveness: Tiered volume pricing with long-term supply agreements (3–5 years) that index to energy costs, not spot market volatility – typically 15–20% below EU- and US-based competitors at equivalent MPD levels.

• Sustainability: 100% of polishing slurry recycled; wafering process uses 30% less water than industry average; carbon-neutral shipment option available via verified offsets.

• Technical Support: Dedicated field application engineers (FAEs) for device fabrication support, epitaxy transfer consultation, and in-line process optimization – available within 48 hours globally.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): 20MT (metric tons) – representing approximately 4,800 pcs of 150mm wafers or 2,200 pcs of 200mm wafers, depending on thickness grade.

• Loading Capacity (MT per container):

  • 20-foot dry container: 20 MT (full container load – FCL)

  • Note: Single-wafer packaging yields ~22 kg per standard carton (80 wafers of 150mm); container stowage assumes palletized cargo at 650 kg/m³ density. Temperature-controlled reefer containers available at same capacity (20 MT per 20’ reefer).