How To Ensure The Quality Of Printed Circuit Board Assembly?
There are many links involved in the PCB assembly process, and the quality of each link can be controlled to produce high-quality products. If a certain link in the printed circuit board assembly process is neglected and controlled, there may be product quality problems that cannot reach the customer's overdue level, which will lead to later repairs and waste of manpower, material resources and time, etc. Therefore, the control of each link is is the top priority. We generally control the quality of its products from Gerber documents, materials, manufacturing processes and testing.
1. Gerber and BOM files
After receiving the customer's PCBA order, we firstly hold a pre-production meeting, analyze its Gerber file, and submit a manufacturability report (DFM) according to different customer needs. In this way, some problems in the later manufacturing process can be avoided in the early stage.
2. Procurement and inspection of electronic components.
Sourcing channels for electronic components must be strictly controlled, and goods must be sourced from large traders and original manufacturers to avoid the use of second-hand and counterfeit materials. In addition, it is necessary to set up a special PCBA incoming inspection, and strictly check the following items to ensure that the components are fault-free. TECOO has accumulated professional and high-quality suppliers in the electronics manufacturing industry, and has a dedicated global supply chain system. All components are purchased in strict accordance with the manufacturers required in the BOM, and there will be special quality personnel to inspect the material conditions after the materials are received. Ensure material controllability during subsequent manufacturing and assembly.
3. SMT assembly and plug-in processing
Solder paste printing and reflow oven temperature control systems are key points of assembly, and require higher quality and higher assembly requirements for laser stencils. According to the needs of the PCB, some need to increase or decrease the steel mesh or U-shaped hole, only need to make the steel mesh according to the process requirements. Among them, the temperature control of the reflow oven is very important for the wetting of the solder paste and the firmness of the wire mesh, which can be adjusted according to the normal SOP operation guidelines. In addition, strict implementation of AOI testing can greatly reduce defects caused by human factors. In the plug-in process, the mold design of wave soldering is the key. PE engineers must continue to practice and learn how to use molds to maximize productivity. We design and validate each manufacturing process according to 6-Sigma, guarantee the traceability and consistency of its products, we can also attach what we have done for other projects for your reference.
4. Printed circuit board assembly test
For orders with PCBA test requirements, the main test contents include ICT (circuit test), FCT (functional test), aging test, temperature and humidity test, vibration test, etc. to ensure quality reliability.
As a professional electronics manufacturing service company, TECOO provides "turnkey" services to our customers, we track the life cycle of product manufacturing from start to finish. Our goal is to be your reliable Electronic Manufacturing Services (EMS) partner.
