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3Inch R-axis 76.2mm Al2O3 Sapphire Crystal Wafers Custom Sapphire Glass SSP 0.43mm
GENERAL Chemical Formula Al2O3 Crystal Stucture […]
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GENERAL | |||
Chemical Formula | Al2O3 | ||
Crystal Stucture | Hexagonal System ((hk o 1) | ||
Unit Cell Dimension | a=4.758 Å,Å c=12.991 Å, c:a=2.730 | ||
PHYSICAL | |||
Metric | English (Imperial) | ||
Density | 3.98 g/cc | 0.144 lb/in3 | |
Hardness | 1525 – 2000 Knoop, 9 mhos | 3700° F | |
Melting Point | 2310 K (2040° C) | ||
STRUCTURAL | |||
Tensile Strength | 275 MPa to 400 MPa | 40,000 to 58,000 psi | |
at 20° | 400 MPa | 58,000 psi (design min.) | |
at 500° C | 275 MPa | 40,000 psi (design min.) | |
at 1000° C | 355 MPa | 52,000 psi (design min.) | |
Flexural Stength | 480 MPa to 895 MPa | 70,000 to 130,000 psi | |
Compression Strength | 2.0 GPa (ultimate) | 300,000 psi (ultimate) |
Kyropoulos process (KY process) for sapphire crystal growth is currently used by many companies in China to produce sapphire for the electronics and optics industries.
High-purity, aluminum oxide is melted in a crucible at over 2100 degrees Celsius. Typically the crucible is made of tungsten or molybdenum. A precisely oriented seed crystal is dipped into the molten alumina. The seed crystal is slowly pulled upwards and may be rotated simultaneously. By precisely controlling the temperature gradients, rate of pulling and rate of temperature decrease, it is possible to produce a large, single-crystal, roughly cylindrical ingot from the melt.
After single crystal sapphire boules are grown, they are core-drilled into cylindrical rods, The rods are sliced up into the desired window thickness and finally polished to the desired surface finish.
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Used as a window material
Synthetic sapphire (sometimes referred to as sapphire glass) is commonly used as a window material, because it is both highly transparent to wavelengths of light between 150 nm (UV) and 5500 nm (IR) (the visible spectrum extends about 380 nm to 750 nm, and extraordinarily scratch-resistant. The key benefits of sapphire windows are:
* Very wide optical transmission band from UV to near-infrared
* Significantly stronger than other optical materials or glass windows
* Highly resistant to scratching and abrasion (9 on the Mohs scale of mineral hardness scale, the 3rd hardest natural substance next to moissanite and diamonds)
* Extremely high melting temperature (2030 °C)
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Item | Parameter | Spec | Unit | ||
1 | Product Name | Sapphire Wafer (Al2O3) | |||
2 | Diameter | 2” | 4” | 6” | mm |
3 | Thickness | 430± 25 | 650± 25 | 1000 ± 25 | μm |
4 | Surface Orientation | C-Plane (0001) tilted M-axis 0.2°/0.35°± 0.1° | degree | ||
5 | Primary Flat | A-Axis (11-20) ± 0.2° | degree | ||
Orientation Length | 16 ± 0.5 | 31 ± 1.0 | 47.5 ± 2.0 | mm | |
6 | TTV | < 10 | < 10 | < 25 | μm |
7 | Bow | -10 ~ 0 | -15 ~ 0 | -30 ~ 0 | μm |
8 | Warp | 10 | 20 | 30 | μm |
9 | Roughness Front Side | 0.5 | 0.5 | 0.5 | nm |
10 | Roughness Back Side | 1.0 ± 0.3 | μm | ||
11 | Wafer Edge | R-Type or T-Type | |||
12 | Laser Mark | Customize |
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Stock Sapphire Wafer Catalog
Standard wafer 2 inch C-plane sapphire wafer SSP/DSP 3 inch C-plane sapphire wafer SSP/DSP 4 inch C-plane sapphire wafer SSP/DSP 6 inch C-plane sapphire wafer SSP/DSP | Special Cut A-plane (1120) sapphire wafer R-plane (1102) sapphire wafer M-plane (1010) sapphire wafer N-plane (1123) sapphire wafer C-axis with a 0.5°~ 4° offcut, toward A-axis or M-axis Other customized orientation |
Customized Size 10*10mm sapphire wafer 20*20mm sapphire wafer Ultra thin (100um) sapphire wafer 8 inch sapphire wafer | Patterned Sapphire Substrate (PSS) 2 inch C-plane PSS 4 inch C-plane PSS |
2inch | DSP C-AXIS 0.1mm/ 0.175mm/0.2mm/0.3mm/0.4mm/0.5mm/1.0mmt SSP C-axis 0.2/0.43mm(DSP&SSP) A-axis/M-axis/R-axis 0.43mm |
3inch | DSP/ SSP C-axis 0.43mm/0.5mm |
4Inch | dsp c-axis 0.4mm/ 0.5mm/1.0mmssp c-axis 0.5mm/0.65mm/1.0mmt |
6inch | ssp c-axis 1.0mm/1.3mmm dsp c-axis 0.65mm/ 0.8mm/1.0mmt |
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