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6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade
6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade
6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade
6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade
6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade
6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade
Specifications
Brand Name :
ZMSH
Model Number :
6inch 8inch 4H-SEMI SiC
Certification :
rohs
Place of Origin :
CHINA
MOQ :
25pc
Price :
by case
Payment Terms :
T/T
Supply Ability :
1000pc/month
Delivery Time :
in 30days
Packaging Details :
customzied plastic box
Size :
6inch,8inch
Type :
4H-SEMI
Thickness a (Tropel) :
500.0 µm ±25.0 µm
Refractive index a :
>2.6 @550nm
Haze a :
≤0.3%
Microtube density :
≤0.5/cm²
Notch orientation :
<1-100>±2°
Description

​​6 Inch 8 Inch 4H-SEMI SiC Substrate Overview​​

​​Optical Grade 6inch 8inch 4H-SEMI Type SiC Substrate for AR Glasses​​

A revolutionary optical-grade 4H-SiC substrate designed specifically for AR glasses, grown via ​​Physical Vapor Transport (PVT)​​ and refined through ​​nano-scale polishing​​ and ​​low-stress slicing​​. This product achieves ​​the world’s first single-layer waveguide full-color display solution​​, addressing critical challenges in AR optics:

  • ​​Ultra-High Refractive Index (n=2.619@750 nm)​​: Outperforms traditional glass (1.5–1.9) and resin (1.4–1.7), enabling ​​>80° field of view (FOV)​​ with a thickness of only ​​0.55 mm​​ and weight ​​<2 g​​, eliminating the bulkiness and chromatic aberration of multi-layer glass solutions.
  • ​​Thermal Conductivity of 490 W/m·K​​: Efficiently dissipates heat from high-power optical modules, ensuring stable performance during prolonged use.
  • ​​Transmittance >95% (post-anti-reflective coating)​​: Ultra-low absorption coefficient (α<0.5%/μm @550 nm) minimizes optical loss, enhancing brightness and contrast.

This substrate redefines lightweight, immersive AR experiences, driving the next generation of consumer-grade AR glasses.

​​

​​6 Inch 8 Inch 4H-SEMI SiC Substrate Innovative Features​​

1. High Refractive Index with Low Dispersion​​

  • ​​Technical Breakthrough​​: The 4H polytype (ABCABCB stacking sequence) achieves ​​n=2.619@750 nm​​, compressing grating periods to ​​300 nm​​ to suppress environmental light diffraction, reducing chromatic dispersion by ​​40%​​.
  • ​​Application Value​​: Replaces traditional 3-layer glass waveguides with a ​​single-layer SiC solution​​, reducing thickness by ​​80%​​ and enabling compatibility with Micro LED micro-displays for high-resolution full-color rendering.

6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade

2. ​​Ultra-Low Thermal Expansion Coefficient (CTE=3.7×10⁻⁶/K)​​

  • ​​Technical Breakthrough​​: The 4H-SiC crystal structure ensures thermal stability, with CTE ​​1/3 that of glass​​, preventing warping and optical path shifts under thermal cycling.
  • ​​Application Value​​: Operates reliably in ​​-20–85°C​​ environments, ideal for outdoor AR applications.

3. Nano-Scale Surface Flatness (Ra<0.2 nm)​​

  • ​​Technical Breakthrough​​: Combines ​​chemical mechanical polishing (CMP)​​ and plasma etching to eliminate subsurface damage, achieving ​​±5 nm​​ etching precision.
  • ​​Application Value​​: Achieves ​​98% waveguide efficiency​​, minimizing light leakage.

4. ​​Defect Density <0.04/cm² (8-inch)​​

  • ​​Technical Breakthrough​​: Advanced ​​liquid-phase growth (TSSG)​​ reduces microtube density to ​​<0.04/cm²​​ and dislocation density to ​​<1000/cm²​​.
  • ​​Application Value​​: Improves yield to ​​>95%​​, lowering manufacturing costs.

5. ​​Large-Scale 8-inch Production Capability​​

  • ​​Technical Breakthrough​​: 8-inch wafers reduce edge waste by ​​7%​​, yielding ​​10–12 AR lenses per wafer​​.
  • ​​Application Value​​: Reduces per-lens cost by ​​30–50%​​, accelerating mass-market adoption.

6 Inch 8 Inch 4H-SEMI SiC Substrate Applications​​

6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade

1. AR Lens Waveguides​​

  • ​​Function​​: 6 inch 8 inch 4H-SEMI SiC substrate acts as a substrate for ​​surface-relief grating waveguides (SRG)​​, enabling full-color, high-resolution displays.
  • ​​Advantage​​: Replaces multi-layer glass with a ​​0.55 mm-thin, <2 g lens​​, achieving ​​FOV >80°​​.

2. ​​Micro LED Display Modules​​

  • ​​Function​​: 6 inch 8 inch 4H-SEMI SiC substrate serves as a carrier for ​​mass transfer of Micro LEDs​​, enhancing brightness and contrast.
  • ​​Advantage​​: High thermal conductivity (​​490 W/m·K​​) resolves Micro LED heat dissipation challenges, supporting ​​>10,000 PPI​​ pixel density.

3. ​​AR Optical Stabilization Systems​​

  • ​​Function​​: Integrates ​​MEMS micromirror arrays​​ for dynamic light path compensation.
  • ​​Advantage​​: SiC’s mechanical strength (​​450 GPa Young’s modulus​​) and thermal resilience (​​-55–300°C​​) ensure reliability.

​​4. Smart Glasses Thermal Management​​

  • ​​Function​​: 6 inch 8 inch 4H-SEMI SiC substrate provides heat dissipation support for AR chips (e.g., SoCs, laser drivers).
  • ​​Advantage​​: Withstands ​​>10 W/mm²​​ transient power density, preventing thermal throttling.

​​6 Inch 4H-SEMI SiC Substrate Technical Parameter

​​Crystal parameters​​
Type 4H
Refractive index a >2.6 @550nm
Absorptivity a ≤0.5% @450-650nm
MP transmittance a
(without anti-reflection conditions)		 ≥66.5%
Haze a ≤0.3%
Polymorphism a None permitted
Microtube density ≤0.5/cm²
Hexagonal void density None permitted
Impurity Grain on Hexagonal a None permitted
MP Inclusion a None permitted
​​Mechanical parameters​​
Dia(inches) 6
Surface orientation (0001)±0.3°
Notch reference edge Notch
Notch orientation <1-100>±2°
Notch angle 90±5°/1°
Notch depth 1 mm ±0.25 mm (-0 mm)
Surface treatment C-Si side (CMP)
Wafer edge Bevel
Surface roughness (AFM) Ra≤0.2 nm
(5×5 µm scan area)
Thickness a (Tropel) 500.0 µm ±25.0 µm
LTV (Tropel) ≤2 µm
TTV a (Tropel) ≤3 µm
Bow a (Tropel) ≤5 µm
Warp a (Tropel) <15 µm

Recommend other type of SiC

6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade

6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade

6 Inch 8 Inch 4H-SEMI SiC Substrate FAQ

1. Q: What are the key advantages of SiC substrates for AR glasses?​​

A: ​​High refractive index (n=2.619@750nm)​​ enables ultra-thin single-layer waveguides (<0.55mm) with ​​>80° FOV​​, eliminating rainbow effects and weight issues in traditional glass solutions.

​​2. Q: Why choose 4H-SEMI type SiC substrates over other polytypes?​​

A: ​​4H-SiC​​ offers ​​superior thermal stability (CTE=3.7×10⁻⁶/K)​​ and ​​defect density <0.04/cm² (8-inch)​​, ensuring reliability in high-power optical systems and mass production scalability.

Tag: #Silicon carbide substrate, #6inch, #8inch, #Semiconductor materials, #4H-SEMI SiC, #Product Grade, #5G Communications​​, # AR Glasses, #MOS Grade, #4H-SiC Substrates,#​​Optical Grade

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6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade

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Product Detail
Brand Name :
ZMSH
Model Number :
6inch 8inch 4H-SEMI SiC
Certification :
rohs
Place of Origin :
CHINA
MOQ :
25pc
Price :
by case
Contact Supplier
6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade
6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade
6inch 8inch 4H-SEMI SiC Substrate for AR Glasses Optical Grade

SHANGHAI FAMOUS TRADE CO.,LTD

Verified Supplier
8 Years
shanghai, shanghai
Since 2013
Business Type :
Manufacturer, Agent, Importer, Exporter, Trading Company
Main Products :
Gallium Nitride Wafer, Sapphire Wafer, SiC Substrate
Total Annual :
1000000-1500000
Certification Level :
Verified Supplier
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