PCBA is PCB circuit board art, such as PCB circuit board manufacturing, component procurement and inspection, SMT chip processing, plug-in processing, program burning, testing, aging, etc. The PCBA processing process involves many links. In order to produce good products, we must control the quality of each link.

1. PCB circuit board manufacturing.
After receiving the PCBA order, analyze the Gerber file, pay attention to the relationship between the PCB hole spacing and the board bearing capacity, do not bend or break, and whether the wiring considers key factors such as high-frequency signal interference and impedance.
2. Component procurement and inspection.
Parts procurement requires strict control of channels, and must be picked up from large traders and original factories to avoid 100% second-hand materials and fake materials. In addition, a special incoming inspection post has been set up to strictly check the following items to ensure that the parts are fault-free.
PCB: reflow oven temperature test. Flying wires are prohibited. Whether the via hole is blocked or leaking ink; whether the board surface is bent;
IC: check whether the silk screen is completely consistent with the BOM, and store it at constant temperature and humidity;
other common materials: check the silk screen, appearance, power-on measurement value, etc., and the inspection items are carried out according to the sampling method , the proportion is generally 1-3%.
3. SMT chip processing.
Solder paste printing and reflow oven temperature control are the key points. It is very important that the laser stencil is of good quality and meets the process requirements. According to the requirements of the PCB, some stencils need to be increased or decreased, or U-holes should be used, and the stencils should be made according to the process requirements. The gentle speed control of the reflow oven is critical to solder paste penetration and solder reliability and can be controlled according to normal SOP operating guidelines. In addition, AI testing needs to be strictly enforced to reduce adverse effects caused by human factors.