FUYAO QUARTZ 4-inch A-axis sapphire wafers are high-purity, monocrystalline substrates specifically designed for epitaxial growth and precision LED applications. The A-plane (11-20) orientation provides uniform dielectric properties, excellent insulation, and stable lattice structure, making it ideal for:

• GaN thin-film epitaxy

• Hybrid microelectronics

• Superconducting thin films

Each wafer is manufactured to strict specifications, ensuring ultra-flat surfaces, low roughness, minimal warp/bow, and tight thickness control—critical for high-performance optical and semiconductor applications.

Material Characteristics

• Ultra-high purity: ≥ 99.999% Al₂O₃ minimizes metallic and ionic contamination.

• Stable crystallography: Supports epitaxial growth of III-V nitrides, superconductors, and thin films.

• Surface quality: SSP front surface Ra < 0.5 nm; DSP front & back Ra < 0.5 nm ensures optical-grade smoothness.

• Mechanical stability: Low warp (<15 μm), low bow (-15 μm to 0 μm), TTV <10 μm.

• Chemical resistance: Chemically stable and thermally robust for semiconductor and research environments.

Specifications of 4-Inch A-Plane Sapphire Wafers (430 μm)

Toepassingen

• LED Epitaxial Growth: Optimal substrate for GaN-based LEDs and III-V nitride thin films.

• Semiconductor Devices: High insulation and uniform dielectric constant support hybrid microelectronics.

• Superconductors: Growth of TlBaCaCuO, Tl-2212, and other hetero-epitaxial superconducting thin films.

• Optics & Thin-Film Applications: Ultra-smooth surfaces allow precise patterning and device fabrication.

• Research & Development: Ideal for laboratory epitaxy and thin-film experiments.

Belangrijkste kenmerken

• Ultra-high optical and chemical purity

• Excellent thermal and mechanical stability

• Low coefficient of thermal expansion for precise alignment

• Resistant to most chemical reagents

• Precision-machined surfaces for optimal optical and epitaxial performance

Kwaliteitsborging

FUYAO QUARTZ implements strict quality control, including appearance inspection, dimensional verification, optical performance tests, and parallelism measurement. Each wafer meets international and industry-specific standards, ensuring reliability in high-tech and research environments.

FAQ

1. Can wafers be fully customized?
   Yes. FUYAO QUARTZ supports any diameter, thickness, orientation, and SSP/DSP surface finish.

2. What is the surface roughness of these wafers?
   SSP front surface Ra < 0.5 nm; DSP surfaces Ra < 0.5 nm, suitable for epitaxial growth.

3. Which industries use A-plane sapphire wafers?
   LED epitaxy, GaN thin films, superconductors, hybrid microelectronics, and optical research.

4. What are the tolerances for thickness and flatness?
   Thickness ±25 μm, TTV <10 μm, Bow -15 μm to 0 μm, Warp <15 μm.