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CG MATERIAL

Sapphire Wafer

Sapphire Wafer

Sapphire wafers are precision substrates made from single-crystal aluminum oxide (Al₂O₃). They are widely used as base materials for epitaxial growth (GaN, AlN, LED structures), optical components, and advanced electronic devices due to their excellent thermal stability, electrical insulation, and mechanical strength.

CG Material supplies high-quality sapphire wafers in various diameters, orientations, thicknesses, and surface finishes.

Key Features

  • High purity single crystal Al₂O₃ (≥99.99%)
  • Excellent thermal stability up to ~1800°C
  • High mechanical strength and hardness (Mohs 9)
  • Superior chemical and plasma resistance
  • Excellent electrical insulation properties
  • Low defect density for epitaxial growth
  • Available in epi-ready polished surfaces

Sapphire Wafer Specifications

Growth

Kyroplous

Diameter

Ø 1" / Ø 2" / Ø 3" / Ø 4"/ Ø 5"

Size

10 x 10 / 20 x 20 / 50 x 50 / 100 x 100 mm

Thickness

0.43 mm / 0.5 mm  / 1 mm

Surface

one side / two sides epi polished

Roughness

Ra ≤ 5 A

Package

Single wafer container or Ampak cassette

 

Chemical formula

Al2O3

Crystal structure

Hexagonal

Lattice constant

4.77 A

Hardness

9

Thermal conductivity

46 W / mk

Dielectric constant

11.58

Refractive index

1.768

Custom Manufacturing

CG Material provides:

  • Custom diameters and thickness
  • Custom crystal orientation
  • Epi-ready polishing (Ra < 0.2 nm)
  • TTV / bow / warp control
  • Cleanroom packaging
  • Small sample or bulk production

Drawings and technical specifications are welcome.

Sapphire Wafer vs Silicon Wafer

Property Sapphire Wafer Silicon Wafer
Hardness Mohs 9 Mohs 7
Electrical Conductivity Insulator Semiconductor
Thermal Stability Up to 1800°C ~600°C
Chemical Resistance Excellent Moderate
Epitaxial Use GaN / AlN CMOS standard
Cost Higher Lower

Sapphire Wafer Applications

Semiconductor Industry

Used as substrates for GaN, AlN, and LED epitaxial growth, high-frequency devices, and power electronics.

Optoelectronics

Used in laser diodes, photodetectors, and advanced optical thin-film systems.

Silicon on Sapphire (SOS)

High-performance insulating substrates for RF and high-speed electronic devices.

Research & Advanced Materials

Used in quantum research, thin film deposition, and material science experiments.

Request a Quote

Send us:

  • Diameter
  • Thickness
  • Crystal orientation
  • Surface finish
  • Quantity

Our engineering team will provide a quotation within 24 hours.

 

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