| Item | Nano-Patterned Sapphire Substrate（2~4inch） | |||
| Diameter | 50.8 ± 0.1 mm | 100.0 ± 0.2 mm | ||
| Thickness | 430 ± 25μm | 1000 ± 25μm | 650 ± 25μm | 1000 ± 25μm |
| Surface Orientation | C-plane (0001) off-angle toward M-axis (10-10) 0.2 ± 0.1° | |||
| C-plane (0001) off-angle toward A-axis (11-20) 0 ± 0.1° | ||||
| Primary Flat Orientation | A-Plane (11-20) ± 1.0° | |||
| Primary Flat Length | 16.0 ± 1.0 mm | 30.0 ± 1.0 mm | ||
| Front Surface Finish | Patterned | |||
| Back Surface Finish | SSP:Fine-ground,Ra=0.8-1.2um; DSP:Epi-polished,Ra<0.3nm | |||
| Laser Mark | Back side | |||
| TTV | ≤8μm | ≤10μm | ||
| BOW | ≤10μm | ≤15μm | ||
| WARP | ≤12μm | ≤20μm | ||
| Edge Exclusion | ≤2 mm | |||
| Pattern Specification | Shape Structure | Hexagonal Array | ||
| Pattern Type | V500 | V600 | V700 | |
| Pattern Diameter | 400-550nm | 550-650nm | 650-750nm | |
| Pattern Height | 250-450nm | 250-450nm | 250-450nm | |
| Pattern Pitch | 1000nm | 1000nm | 1000nm | |
| Pattern Specification |
Pattern Type | V800 | V900 | ∧700 |
| Pattern Diameter | 750-850nm | 850-950nm | 600-800nm | |
| Pattern Height | 350-550nm | 350-550nm | 350-550nm | |
| Pattern Pitch | 1000nm | 1000nm | 1000nm | |
| Pattern Micrographs | 
（1）Hexagonal array （2）Convex Pattern （3）Concave Pattern |
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Customization specifications：
* Nanometer patterned sapphire substrate（NPSS）.
* Sapphire PSS of various orientations
Nano-Patterned Sapphire Substrate (NPSS) is a process of forming specific nanometer-scale patterns, such as nano-cones or nano-pits, on the surface of the sapphire substrate. These nanoscale structures create stronger light scattering and refraction effects compared to traditional micro-patterns, thereby further enhancing the light extraction efficiency and improving the overall luminous performance of LED and Micro LED devices.
| Crystal Structure | Hexagonal |
| Lattice Constant(nm) | a=4.76Å c=12.99Å |
| Density(g/cm3) | 3.98 |
| Melting point（℃） | 2040 |
| Mohs Hardness(mohs) | 9 |
| Dielectric Constant | 9.3(A plane) 11.5(C plane) |
| Thermal Conductivity(W/cm.K) | 0.46 |
| Thermal Expansion | 6.7*10-6/k(C plane) 5.0*10-6/k(A plane) |
| Refractive Index | 1.762-1.777 |
| Transmission | Test sample:Sapphire：D76.2*4mm |
| UV:200~380nm 74%~84% | |
| Visible light：380~760nm 85% | |
| Infrared：760~1000nm 85% | |
| Far-Infrared：>1000nm 80%~100% |
