PCB News - How to judge the pass rate of PCB proofing and SMT patch?

How to judge the pass rate of PCB proofing and SMT patch?
In the entire PCBA processing process, PCB proofing and SMT placement steps are particularly important. It may be that many of my friends don’t really understand these two professional terms, but they are closely related to our lives. Most electronic products contain electronic components such as resistors and capacitors, and these various components need to be combined together. A circuit board serves as support. So, how to judge the pass rate of PCB proofing and SMT patch?
PCB board
The first point: How is the electrical connection between PCB proofing and SMT placement? Speaking of how, once a virtual solder or a small amount of alloy layer is formed on the surface of the component, it is difficult to find at the beginning of the test, but with the continuous increase of time, once the contact layer is completely oxidized, it is prone to desoldering, resulting in When the circuit is off and on, it cannot work normally. This is a troublesome phenomenon in the PCB proofing and SMT patch process, so manufacturers need to deal with it carefully, and the unqualified products must be sampled to avoid entering the market.

The second point: PCB proofing and solder joint appearance of SMT patch. The engineers of Boyuan Electronics pointed out that for any qualified PCB circuit board, the surface of the solder joints must be very smooth, clean, and have a very bright metallic luster. On the contrary, once dirt or residue appears, PCB proofing and SMT patch will inevitably be affected. Under normal circumstances, leakage and frequent short circuits are prone to occur, especially in early electronic products. These phenomena are very obvious. However, with the continuous advancement of the times, the appearance of PCB proofing and SMT patch solder joints has slowly disappeared, but there are still some niche companies that will ignore these problems.

PCB proofing

The third point: whether there are burrs, tin drag, gaps, etc. on the surface of PCB proofing and SMT patch. Once there is such a situation, the aesthetics of PCB proofing and SMT patch will inevitably be greatly compromised, and even bring other hazards. Everyone should know that tip discharge is very likely to occur during high-voltage construction, so it is normal for electronic products to be damaged. Therefore, Boyuan Electronics reminds everyone that it is not easy to ensure that the surface solder joints are not abnormal. In the event of false soldering, false soldering, and unreliable patching, experienced masters can often avoid such problems.

In the process of PCB proofing and SMT placement, every step of the process flow is very important. Generally speaking, it is from silk screen printing, dispensing, mounting, curing, reflow soldering, cleaning to inspection and repair. Each process is closely related. If a problem occurs, it must be resolved, and if a failure occurs, it must be repaired. Otherwise, how to meet the high density of PCB proofing and SMT patch? Can you imagine how such small and light electronic products can prevail in the electronics industry? It must be inseparable from its own technology and craftsmanship.

PCB board

Because of this, a professional PCB proofing and SMT chip manufacturer will inevitably be equipped with corresponding staff according to different types of work. Dedicated persons are responsible for special tasks, from SMT placement operators to material staff to inspectors, human resources are indispensable in every link. Small investment and big return, this is the truth that every enterprise must understand