PCBA Assembly Automatic Control Circuit SMT PCB

PCBA Assembly Automatic Control Circuit SMT PCB

Introduction of PCBA SMT

SMT is a circuit-mounting technology that solders the assembly of leaderless or short lead surface mount components (referred to as SMC / SMD) on the surface of PCB board by reflow or dip soldering.

General Speaking, the electronic products are produced by PCB Circuit board and a variety of capacitors, resistors and other electronic components according to the design of the circuit. So all kinds of electronics need different PCBA SMT processing technology.

SMT Basic Process:

Solder Paste Printing -> Parts Placement -> Reflow Soldering -> AOI Optical Inspection -> Cleaning -> Maintenance -> Rework.

 

SMT Mounting Processing Advantages: 

high assembly density, small size, light weight, high reliability, and strong vibration resistance.

Solder joint defect rate is low.

Good high-frequency characteristics.

Reduced electromagnetic and radio frequency interference.

Easy to automate and increase productivity.

Reduce costs up to 30% to 50%.

Save material, energy, equipment, manpower, time and so on.

SMT Footprint

there is no difference on function between SMT and DIP in PCB Assembly, the difference is that the components package/footprint. SMT footprint needs high temperatures during soldering, so the components and pcb boards must have a matching coefficient of thermal expansion. These factors must be fully considered when designing.

The advantages of the appropriate package:

1) Effectively save the PCB area;

2) Provide better electrical performance;

3)Protect the internal components from the damp and other environmental effects; 4)Provide good communication links;

5)Help heat dissipation and facilitate the transmission and testing.