2Inch-6 Inch LED Grade Sapphire Crystal Substrate Sapphire (molecular formula Al2O3) single crystal is an excellent
multifunctional material. It has high temperature resistance, good
heat conduction, high hardness, infrared penetration and good
chemical stability. Widely used in industry, national defense and
scientific research in many fields (such as high temperature
resistant infrared window, etc.). At the same time, it is also a
kind of single crystal substrate material with a wide range of
uses. It is the preferred substrate in the blue, purple, white
light emitting diode (LED) and blue laser (LD) industry at present
(gallium nitride film needs to be epitaxed on the sapphire
substrate first), as well as an important superconducting thin film
substrate. Orientation Cut | R-plane, C-plane, A-plane, M-plane or a specified orientation | Orientation Tolerance | ± 0.3° | Diameter / Size | 2 inches, 3 inches, 4 inches, 6 inches, 8 inches or others | Diameter Tolerance | ± 0.2mm | Thickness | 0.25mm, 0.33mm, 0.43mm, 0.65mm, 1mm or others; | Thickness Tolerance | ± 25μm | Primary Flat Length | 16.0±1.0mm for 2 inches, 22.0±1.0mm for 3 inches, 30.0±1.5mm for 4 inches, 47.5/50.0±2.0mm for 6 inches | Primary Flat Orientation | A-plane (1 1-2 0 ) ± 0.2°; C-plane (0 0-0 1 ) ± 0.2°, Projected C-Axis 45 +/- 2° | TTV | ≤10µm for 2 inches, ≤15µm for 3 inches, ≤20µm for 4 inches, ≤25µm
for 6 inches | BOW | ≤10µm for 2 inches, ≤15µm for 3 inches, ≤20µm for 4 inches, ≤25µm
for 6 inches | Front Surface | Epi-Polished (Ra< 0.3nm for C-plane, 0.5nm for other
orientations) | Back Surface | Fine ground (Ra=0.6μm~1.4μm) or Epi-polished | Packaging | Packaged in a class 100 clean room environment |
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