How are Electronic Components Placed on PCB to form PCBA?

In the last article, we are talking about how to manufacture PCB. In this article, let’s briefly talking about how electronic components are placed on the PCB to form the PCBA!

The current mainstream PCBA assembly is "SMT (Surface Mount Technology)", which first prints solder paste on the empty board, then attaches the electronic components to the PCB, and then flows it back through High-temperature soldering furnace (Reflow), the components are soldered and pasted on the PCB through solder paste.

A small number of PCBA assembly will use "Wave Soldering" technology. Generally speaking, there will be some electronic components on the assembly board that are relatively heavy or need to withstand external force insertion and removal. Such components cannot be made into SMD components unless it is technically necessary. , that is, the price of SMD components does not meet market expectations, or some components that must withstand external plugging and unplugging when used by end customers, they will be designed as through-hole components, that is, plug-ins (THD, Through Hole Devices), and then A flow wave soldering oven solders the components to the PCB.

There are also designs that use SMT and Wave soldering technologies simultaneously to achieve components soldered to PCBs.

Thanks so much for your reading!