XRD-Based Wafer Orientation Instrument for High-Precision Cutting Angle Determination
A wafer orientation instrument is a high-precision device based on X-ray diffraction (XRD) technology, designed for semiconductor and optical material industries to determine crystal lattice orientation and cutting angles. Its core components include:
Parameter Category | Parameter | Specifications/Description |
X-ray System | X-ray Tube | Copper (Cu) target, focal spot 0.4×1 mm, air-cooled |
X-ray Voltage/Current | 30 kV, 0–5 mA adjustable | |
Detector Type | Geiger-Müller tube (low energy) or scintillation counter (high energy) | |
Time Constant | 0.1/0.4/3 sec adjustable | |
Goniometer | Sample Size | Wafer: 2–12 inch; Ingot: ≤200 mm (diameter) × 500 mm (length) |
Angular Range | θ: -10° to +50°, 2θ: -10° to +110° | |
Orientation Accuracy | ±10″–±30″ (high-precision models: ±3″) | |
Angular Resolution | Minimum reading: 1″ (digital) or 10″ (scale) | |
Scanning Speed | Full orientation in 10 sec (fully automated) | |
Automation & Control | Sample Stage | V-groove (2–8 inch wafers), edge/OF alignment, 1–50 kg capacity |
Multi-axis Motion | X/Y/Z-axis positioning, 360° rotation ±15°, tilt control | |
Interface | PLC/RS232/Ethernet, MES-compatible | |
Physical Specifications | Dimensions | 1130×650×1200 mm (L×W×H) |
Weight | 150–300 kg | |
Power Requirements | Single-phase 220V±10%, 50/60 Hz, ≤0.5 kW | |
Noise Level | <65 dB (operating) | |
Advanced Features | Closed-loop Tension Control | Real-time monitoring, 0.1–1.0 MPa tension regulation |
AI-driven Optimization | Defect detection, predictive maintenance alerts | |
Multi-material Compatibility | Supports cubic (Si), hexagonal (sapphire), and asymmetric crystals (YAG) |
The device operates through X-ray diffraction and Omega scanning technologies:
1. X-ray Diffraction:
2. Omega Scanning:
3. Automated Control:
Feature
| Description
| Technical Parameters/Case Studies
|
Ultra-High Precision
| Omega scanning accuracy ±0.001°, Rocking Curve FWHM resolution <0.005°
| Silicon carbide wafer cutting error ≤±0.5°
|
High-Speed Measurement | Single-scan acquisition of all crystallographic data, 200× faster than manual
| Silicon wafer batch testing: 120 wafers/hour
|
Multi-Material Compatibility | Supports cubic (Si), hexagonal (sapphire), and asymmetric crystals (YAG)
| Applicable materials: SiC, GaN, quartz, garnet
|
AI Integration
| Deep learning algorithms for defect detection, real-time process optimization
| Defect sorting reduces scrap rate to <1%
|
Modular Design
| Expandable X-Y platform for 3D mapping or EBSD integration
| Silicon wafer dislocation density detection ≤100 cm⁻²
|
1. Semiconductor Manufacturing:
2. Optical Material Processing:
3. High-Temperature Alloys & Ceramics:
4. Research & Quality Control:
1. Q: How to calibrate a wafer orientation instrument?
A: Calibration involves aligning the X-ray source and detector using reference crystals, typically requiring <0.001° angular accuracy and automated software adjustments for precision.
2. Q: What is the typical accuracy of a wafer orientation instrument?
A: High-end models achieve ±0.001° precision, critical for semiconductor wafer cutting and crystal defect analysis in industries like photovoltaics and advanced ceramics.
Tags: #Wafer Orientation Instrument, #XRD-Based, #Sapphire, #SiC, #High-Precision Cutting, # Angle Determination