Silicon Wafer Thickness Consistency Detection with Laser Displacement Sensor
Industry pain points and demands
niform thickness in silicon wafers is critical for photovoltaic manufacturing, ensuring optimal performance and reducing waste. Even minor inconsistencies in thickness can affect production quality and increase costs, making reliable thickness detection a necessity.
SinceVision's SG5025 Laser Displacement Sensor offers precise and stable measurements of silicon wafer thickness. Using a dual-sensor through-beam method, each side of the wafer is independently measured, combining the data for a final thickness reading accurate to 5μm. This setup enables real-time monitoring and ensures consistent production standards.
SinceVision Solution: SG5025 Laser Displacement Sensor
01High detection speed of up to 100mm/s, capable of identifying defects as small as 0.5mm × 0.5mm.
02Robust stability ensures precise measurement, even in dynamic environments.
03Offers both wide and small spot beam options, enhancing adaptability for various applications.
Camera Selection
| Model number | SG5020/SG5025 | ||
| Reference distance (CD) | 20mm | ||
| Measuring range | -3mm~3mm | ||
| Light source | Light source wavelength | 655nm | |
| Laser class | Class 2 | ||
| Laser output power | 5mW | ||
| Spot diameter (spot size) | Round spot | Φ45μm | |
| Wide spot | 45×400μm | ||
Repetition accuracy ① | 0.02μm | ||
| linearity | ±0.02% of F.S. | ||
| Temperature characteristic | 0.01% F.S./℃ | ||
| Sampling frequency (Hz) | 1/2/5/10/20/50 KHZ / 88/200/400/590 (optional 10 level) | ||
| Input/output | Communication port | One 100Base-TX/1000Base-T Ethernet interface, one RS232 | |
| Analog output | 1 analog output, support analog voltage and analog current switching | ||
| Encoder input | 1 group difference encoder | ||
| IO input | 14, support timing, zero, reset, laser control, formula switching and other functions | ||
| IO output | 16 channels, determine the status output | ||
| Storage temperature | -20 ~ 70℃ | ||
| Operating temperature | 0 ~ 50 ° C | ||
| Working humidity | 35% to 85% no condensation | ||
| EFT protection | Power port 2kV/5 or 100kHz, signal port 1kV/5 or 100kHz, in accordance with IEC 61000-4-4 standards | ||
| ESD protection | Contact discharge is 4kV and air discharge is 8kV, in line with IEC 61000-4-2 standards | ||
| Vibration | 10Gs (10-500Hz) Compliant with IEC 68-2-6 Fc standard | ||
| Impact | 50Gs/3ms per axis, complies with IEC 68-2-27 Ea standard | ||
| IP level | IP67, complies with IEC 60529 standard | ||
| Dimensions (mm) | 60×61×41 | ||
| Data cable (wiring) model | SCB-GICAM-HA2-3m/5m/10m | ||
| Weight (including cables) | 324g | ||