In a circuit with resistance, inductance, and capacitance, the obstruction to alternating current is called impedance. Impedance is commonly...

At present, in addition to the parts pin holes, mechanical holes, cooling holes and test holes, other through holes (such as Via holes) do n...

There are generally two cases of short circuit, one is that the pcb has reached a certain service life. The second situation is that the ins...

FPC circuit board covering film to open the window processing, but removed from the cold storage can not be processed immediately, especiall...