What exactly does pcb mean?

Printed circuit board (PCB), also known as circuit board, is an important electronic component and is known as the "mother of electronic components". The following is the common sense of PCB that PCB people must know:

1. Traditional circuit boards are called printed circuit boards and printed circuit boards because circuit diagrams and drawings are made of printed resists. At present, most circuit boards are stuck on the attached corrosion inhibitor (lamination or coating), and the circuit boards can only be etched after exposure and development.

2. Circuit boards can be divided into single board, double board and multilayer board. On the most basic PCB, the parts are concentrated on one side and the wires are concentrated on the other side. This PCB is called a single board. Both sides of the double panel are covered with copper and wiring, and the wiring between the two layers can be connected through vias to form the required network connection. Multilayer board refers to a printed board composed of more than three conductive pattern layers and insulating materials spaced between them, and the conductive patterns between them are connected with each other as required.

3. The circuit board is mainly composed of pads, through holes, mounting holes, wires, components, connectors, fillers and electrical boundaries. The main functions of each component are as follows:

(1) pad: a metal hole for soldering components.

(2) Through-holes: including metal through-holes and nonmetal through-holes, and the metal through-holes are used to connect pins between components of all layers.

(3) Mounting holes: used for fixing the circuit board.

(4) Conductor: copper film network used to connect the pins of the assembly.

(5) Connector: used to connect components between circuit boards.

(6) Filler: Applying copper wire to grounding grid can effectively reduce the impedance.

(7) Electrical boundary: used to determine the size of the circuit board.

Note: All components on the circuit board must not exceed the boundary.

4. The working principle of the circuit board is to use the board-based insulating material to isolate the copper foil conductive layer on the surface, so that the current can flow in each element along the pre-designed route, and complete the functions of doing work, amplifying, attenuating, modulating, demodulating and coding.