SMT advantages

1. High assembly density, small size and light weight of electronic products

Compared with traditional through-hole components, the area and mass of chip components are greatly reduced and lightened. Generally, the use of SMT can reduce the volume of electronic products by 60% and reduce the quality by 75%.

2. High reliability and strong earthquake resistance

Since SMC/SMD is leadless or short lead, and is firmly mounted on the surface of the PCB, it has high reliability and strong shock resistance. The solder joint defect rate of SMT is an order of magnitude lower than that of THT.

3. Good high frequency characteristics

Since SMC/SMD reduces the influence of lead distribution characteristics, and is firmly attached to the surface of the PCB, parasitic capacitance and parasitic inductance between leads are greatly reduced, so electromagnetic interference and radio frequency interference are greatly reduced, and high frequency is improved. characteristic.

4. It is easy to realize automation and improve production efficiency

Compared with THT, SMT is more suitable for automated production. THT requires different insertion machines (DIP insertion machine, radial insertion machine, axial insertion machine, tape machine, etc.) according to different components, each machine needs to adjust the assembly time, and the maintenance workload is large. SMT can install all types of SMC/SMD by using one placement machine with different feeders and pick-and-place heads, reducing adjustment preparation time and maintenance workload.

5. Reduce costs

SMT increases the PCB wiring density, reduces the number of drill holes, reduces the area, and reduces the number of PCB layers with the same function, all of which reduce the manufacturing cost of the PCB. No lead or short lead SMC/SMD saves lead material, omits the process of wire trimming and bending, and reduces equipment and labor costs. Improved frequency characteristics reduce RF debugging costs. The volume and weight of electronic products are reduced, which reduces the cost of the whole machine. The welding reliability is good, so that the repair cost is reduced. Therefore, the use of SMT in general electronic products can reduce the total product cost by 30% to 50%.