There are many factors that affect the impedance of PCB boards, such as dielectric thickness, line width/line spacing, copper thickness, and dielectric constant. Let's take a look at the relationship between these factors and the impedance value of PCB boards.1. Dielectric thickness---is the mos

In general, if BGA packaging can be avoided in design, it should be avoided as much as possible, because BGA packaging is difficult to solder and the soldering inside the packaging cannot be checked.Circuit board short circuit: When the circuit board is soldered and aging, some circuit boards will b