In the field of SMT processing, details determine success or failure. From material selection to environmental control, from equipment calibration to process optimization, to strict quality inspection, every step needs to be carefully planned and executed.
1. Material selection and inspection
Component quality: Ensure that all electronic components used come from reliable suppliers and meet the specified electrical performance and mechanical strength requirements.
PCB board quality: Check the flatness, pad integrity, and surface cleanliness of the PCB board to avoid poor soldering caused by substrate issues.
Solder paste selection: Choose the appropriate solder paste according to the type of component and process requirements to ensure good wetting and soldering strength.2. Environmental control
Temperature and humidity management: The SMT processing workshop needs to strictly control the temperature and humidity, generally maintaining a temperature of 22-26 ℃ and a humidity of 45% -70%, to reduce the risk of static electricity and solder paste failure.
Cleanliness: Keep the production environment clean, regularly clean equipment and workbenches, and prevent dust and debris from affecting product quality.
3. Accurate equipment calibration and maintenance
Equipment accuracy: The accuracy of key equipment such as surface mount machines and reflow soldering furnaces needs to be calibrated regularly to ensure the accuracy of mounting positions and welding temperatures.
Daily maintenance: Implement strict equipment maintenance plans, promptly identify and solve potential problems, and avoid production stagnation and product quality issues caused by equipment failures.
4. Optimization of process parameters
Solder paste printing: Adjust the scraper pressure, speed, and angle to ensure that the solder paste is evenly distributed on the PCB pads.
SMT accuracy: Optimize the SMT program based on component size and PCB layout to reduce misalignment and damage.
Reflow soldering: Accurately control the soldering temperature curve to avoid welding defects caused by overheating or undercooling.
5. Quality inspection and feedback
Online monitoring: Utilizing AOI (Automatic Optical Inspection) and AXI (Automatic X-ray Inspection) technologies to monitor quality issues in the production process in real-time.
Finished product testing: Conduct functional and reliability testing on finished products to ensure they meet design requirements. The Importance of SMT Processing and Testing Services
Continuous improvement: Establish a quality feedback mechanism, analyze the causes of defective products, and continuously optimize process parameters and production processes.
