SMT patch refers to the abbreviation of a series of technological processes based on PCB, and PCB (printed circuit board) is a printed circuit board. SMT is a surface mount technology (short for surface mount technology), and it is the most popular technology and process in electronic assembly industry.

Of course, the SMT patch you mentioned should not include DIP devices, so it can be said that SMT is a patch and DIP is a through-hole plug-in process. The following figure illustrates the differences between equipment and processes. Usually SMT (SMT) process uses reflow soldering to complete the welding, and DIP usually uses wave soldering or automatic immersion welding machine to complete the welding!

SMT and DIP