Equipment (Part): The element equipment soldered on the PCB board, which is also the effect of the PCB. The equipment on the PCB light board is presented by the method of pad + silk screen.

　　 Pad (Pad): Connect the pins of the element equipment to the board through an electrical method, which corresponds to the pins of the equipment

　　Track/Trace: The signal line connecting the equipment pins depends on the nature of the signal, such as the current size, speed, etc., the length and width of the trace are also different

Via: If the circuit cannot complete all the signal traces on one level, the signal lines must be connected across the layers through the method of vias. The method and aperture of the vias depend on the characteristics of the signal and the process of the processing plant. Requirements

　　 layer (layer)-the circuit board is divided into many layers, in addition to the signal layer, there are other layers used to define processing, etc.

　　Silk screen/overlay: It can also be called the silk screen layer, which is used to mark various related information on the equipment

　　Solder: It can also be understood literally to prevent the adjacent pins that are not electrically connected from being soldered by mistake.

　　 Mounting hole: A hole that is conveniently placed for installation or debugging