PCB Technical - How to connect IC and PCB

How to connect IC and PCB
How to install an integrated circuit (IC) on the PCB? According to different methods, it can be roughly divided into THT (through-hole technology), that is, through-hole insertion technology, and smt (surface mounting technology), that is, surface mounting technology.
The THT method is: insert the IC pins into the mounting holes of the PCB, and then solder them and fix them. SMT does not need to insert the IC pins into the PCB holes, but directly solder on the surface, that is, solder on the surface. SMT is now the mainstream. Electronic products, especially consumer electronics, basically use SMT technology. So, what are the advantages of SMT?
The THT type IC has a higher area and quality factor, while the SMT type is greatly reduced. It can reduce the volume of electronic products by 60% and reduce the quality by 75%, which can greatly increase the assembly density of PCBs. SMT components are small in size, light in weight, and strong in shock resistance, so they are highly reliable, and their mounting is firmer. There are no leads or short leads, which reduces the influence of parasitic inductance and parasitic capacitance, and improves the high-frequency characteristics of the circuit. Because it can be mounted on the surface, the operation is convenient, which is convenient for automated production and improves the efficiency of the entire process.

Since SMT has so many advantages and has become mainstream now, is THT obsolete or is it no longer in use? This is not the case. Many PCBs still use THT. Although SMT is convenient for automated production, its overall process is not as simple as THT, and the cost of THT basic materials is lower and the investment is relatively small. The product is not demanding, some SMT can not be realized, THT must be used, and its applicable product types are more.
In short, THT and SMT have their own advantages. Nowadays, in factories, connecting IC to PCB is a mixture of these two processes.
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