On the silicon wafer sorting equipment, a 1mm small hole is located on the positioning fixture
On the silicon wafer sorting equipment, a 1mm small hole is located on the positioning fixture
Let me share with you a case study of sensors positioning fixtures on silicon wafer sorting equipment.Energy is the driving force of the economy, and under the "dual carbon" goal, renewable energy such as solar energy is receiving increasing attention. With the competition and development of the photovoltaic industry, the production capacity of silicon wafer manufacturers has significantly increased, and many key manufacturing processes are basically completed by equipment, including silicon wafer sorting equipment.
The silicon wafer sorting equipment can automatically sort the electrical performance, geometric dimensions, and appearance defects of solar silicon wafers. Silicon wafer production enterprises use this system to replace manual detection methods, greatly improving detection efficiency and fully meeting the quality requirements of silicon wafer manufacturers. At the same time, it also reduces the overall quality control costs of the enterprise and downstream enterprises, and improves the competitiveness of customers in the industry.
In this issue, Xiaoming will share with you a case study of sensors positioning fixtures on silicon wafer sorting equipment.
Testing requirements
Install sensors under the turntable mechanism of the silicon wafer sorting equipment. The sensors need to be able to pass through the small holes on the machine and position a 1mm small hole on the fixture, with a positioning accuracy of less than 1mm.
Project difficulties
1. 1mm small hole positioning
2. Need to pass through the small hole on the hole positioning fixture of the machine
3. The fixture moves at a fast speed of about 1000mm/s
4. High positioning accuracy, requiring very small sensor spot size
5. Installation restrictions on workstations require sensors to be installed facing upwards and resistant to interference from LED lights
6. Fixtures come in a variety of colors, including black, white, blue, gray, and more
Solution
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1. Select diffuse reflection laser sensors with high directionality and small divergence angle of light speed for detection
2. This laser sensor uses a specific laser with a wavelength of 650nm red light, which is concentrated in energy and can focus over a long distance
3. The spot size is in the millimeter range, with only 1.5mm of spot size at 100mm
4. 0.25ms high-speed response speed enables it to detect small objects moving at high speeds
5. Background suppression function, which can stably detect without being affected by changes in the color of the tested object (fixture)
6. The product adopts a 6-turn potentiometer design, and the sensitivity can be finely adjusted through the knob on the sensor
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