The acceptance criteria for PCBA involve multiple aspects such as appearance, size, welding quality, electrical performance, environmental requirements, and functional testing.Only by strictly following these standards for acceptance can we ensure that the quality and performance of PCBA meet the requirements.
The primary step in PCBA acceptance is visual inspection.
This step mainly focuses on whether there are obvious defects in the appearance of the PCBA, such as scratches, deformation, discoloration, oxidation, and poor soldering.These defects not only affect the appearance, but may also have adverse effects on the performance and lifespan of the PCBA. Therefore, the surface of the PCBA should be carefully inspected to ensure its appearance is clean and intact.
Dimensional inspection is another important aspect of PCBA acceptance.The size of the PCBA must strictly comply with the design requirements to ensure that it can be installed correctly into the equipment and achieve good coordination with other components. The acceptance personnel should ensure that every size of the PCBA meets the design specifications.
Welding quality is the key to PCBA performance.During the acceptance process, it is necessary to conduct detailed inspections on the soldering of surface mount components, plug-in components, solder pads, solder warping, and solder short circuits.
Good welding should ensure that the solder joints are full, smooth, and free from virtual soldering, solder leaks, and short circuits.
At the same time, attention should be paid to the amount of solder used to avoid poor soldering caused by too much or too little.
Electrical performance inspection is an indispensable part of PCBA acceptance.This step mainly tests the connectivity, power consumption, and signal-to-noise ratio parameters of the circuit board.Through professional testing equipment, inspectors can accurately measure the electrical performance of PCBA to ensure that it meets design requirements.
Environmental requirements are also an important factor to consider in PCBA acceptance.With the increasing awareness of environmental protection, the production and use of PCBA must comply with national environmental requirements and be free of harmful substances such as lead, mercury, cadmium, and hexavalent chromium.This step is usually carried out through chemical analysis and other methods to ensure that the environmental performance of PCBA meets relevant standards.
Functional testing is the final level of PCBA acceptance.According to the design requirements of PCBA, the acceptance personnel need to conduct functional testing to ensure that the PCBA can work properly.This step can be carried out by simulating actual work scenarios and performing various operations on the PCBA to verify its functional integrity and reliability.
In addition, the acceptance criteria for PCBA should also include requirements for inspection environment, sampling level, and inspection equipment.The inspection environment should be maintained within a suitable temperature and humidity range to ensure the accuracy of the acceptance results.The sampling level should follow relevant standards to ensure the fairness and representativeness of the acceptance.The inspection equipment should have sufficient accuracy and stability to meet the acceptance requirements.
