Causes of mainboard faults

In the production process of the circuit board, we often see that the circuit board is covered with copper wire and the surface is covered with glue, but we rarely know what effect they have on the circuit board, then we will understand what effect they have on the board

SMT is an electronic mounting technology, this technology is to install electronic components, such as resistors, capacitors, transistors, integrated circuits, etc., on the printed circuit board, and form an electrical connection through brazing. Components used therein