Sapphire wafer
Sapphire wafers are single-crystal Al2O3 substrates prized for their exceptional hardness, optical transparency, and chemical inertness. With a melting point above 2000°C and outstanding resistance to scratching and thermal shock, sapphire is a preferred substrate material for LED manufacturing, optical windows, and high-temperature electronic devices.
We supply sapphire wafers in sizes from 2 to 12 inches. Custom specifications, including orientation and thickness, are available upon request — please contact us to discuss your requirements.
Specifications
| 2 inch | 3 inch | 4 inch | 6 inch | 8 inch | 12 inch | |
| Diameter | 50.8 ± 0.1 mm | 76.2 ± 0.1 mm | 100 ± 0.1 mm | 150 ± 0.1 mm | 200 ± 0.1 mm | 300 ± 0.1 mm |
| Thickness | 100 ± 15 µm 430 ± 15 µm 500 ± 15 µm |
100 ± 15 µm 430 ± 15 µm 500 ± 15 µm |
200 ± 15 µm 500 ± 15 µm 650 ± 15 µm |
350 ± 15 µm 500 ± 15 µm 1000 ± 15 µm |
700 ± 25 µm 1000 ± 25 µm or customized |
725 ± 25 µm 1600 ± 25 µm or customized |
| Roughness | Ra ≤ 0.2 nm | Ra ≤ 0.2 nm | Ra ≤ 0.2 nm | Ra ≤ 0.2 nm | Ra ≤ 0.3 nm | Ra ≤ 0.5 nm |
| Warp | ≤ 10 µm | ≤ 10 µm | ≤ 10 µm | ≤ 15 µm | ≤ 30 µm | ≤ 60 µm |
| TTV | ≤ 3 µm | ≤ 10 µm | ≤ 10 µm | ≤ 10 µm | ≤ 10 µm | ≤ 10 µm |
| Scratch/Dig | 20/10 | 20/10 | 20/10 | 20/10 | 40/20 | 60/40 |
| Polish | SSP (Single Side Polished) or DSP (Double Side Polished) | |||||
| Primary flat | 16 mm | 22 mm | 32.5 mm | 47.5 mm | NOTCH | NOTCH |
| Edge Form | 45° Shape | |||||