SMT PCB assembly
The basic surface mount technology (SMT) concept of basic through-hole manufacturing continues to provide significant improvements. By using SMT surface mount prototyping, the PCB does not need to be drilled. In addition to increasing a lot of speed, this significantly simplifies the process. Although SMT PCB assembly may not have the strength of through-hole mounting, they provide many other advantages to counteract this problem.
The process of SMT PCB assembly is as follows:
1. PCB production, this is the stage of PCB actual production of solder joints;
2. The solder is deposited on the pad, allowing the component to be fixed to the circuit board;
3. With the help of the machine, the components are placed on precise solder joints;
4. Bake the PCB to harden the solder;
5. Check the completed components.
The difference between SMT and through hole includes:
The widespread space problem in through hole vias PCB mounting is solved by using surface mount technology. SMT also provides design flexibility because it provides PCB designers with the freedom to create dedicated circuits. Reducing component size means that more components can be accommodated on a single circuit board, and fewer circuit boards are required.
The components in the PCBA SMT board assembly installation are leadless. The shorter the lead length of surface mount components, the smaller the propagation delay and the smaller the package noise. The density of components per unit area is higher because it allows components to be mounted on both sides. It is suitable for mass production, thereby reducing the PCB printing cost. Reduced size can increase circuit speed. This is actually one of the main reasons why most PCB and PCBA manufacturers choose this method. The surface tension of the molten solder pulls the component into alignment with the pad. This in turn will automatically correct any small errors that may have occurred in component placement. SMT has proven to be more stable under vibration or large vibrations. SMT parts are generally cheaper than similar through-hole parts.
Importantly, SMT can greatly shorten the production time because no drilling is required. In addition, SMT components can be placed at a rate of thousands of placements per hour, while the installation volume for through-hole mounting is less than a thousand. This in turn leads to products being manufactured at the envisaged speed, which further shortens the time to market. If you are considering speeding up PCB production time, then SMT is clearly the answer. By using design and manufacturing (DFM) software tools, the need for rework and redesign of complex circuits is significantly reduced, and the speed and the possibility of complex designs are further improved.
2. The use of SMT
With the powerful advantages provided by SMT, they have become today's main design and manufacturing standard, which is surprising. Basically, they can be used in any situation where high reliability and high-volume PCBs are required.