Visit：1739 Date：2020-08-24

The circuit board is mainly composed of pads, vias, mounting holes, wires, components, connectors, filling, electrical boundaries, etc.

1. The circuit board is mainly composed of pads, vias, mounting holes, wires, components, connectors, filling, electrical boundaries, etc. The main functions of each component are as follows:
Pad: A metal hole used to solder the pins of components.
Vias: There are metal vias and non-metal vias. Metal vias are used to connect component pins between layers.
Mounting hole: used to fix the circuit board.
Wire: The electrical network copper film used to connect the pins of the components.
Connectors: components used to connect between circuit boards.
Filling: Copper coating for ground wire network, which can effectively reduce impedance.
Electrical boundary: used to determine the size of the circuit board, and all components on the circuit board cannot exceed the boundary.
2. The names of circuit boards are: circuit boards, PCB boards, aluminum substrates, high-frequency boards, thick copper boards, impedance boards, PCBs, ultra-thin circuit boards, ultra-thin circuit boards, printed (copper etching technology) circuit boards, etc. The circuit board makes the circuit miniaturized and intuitive, which plays an important role in the mass production of fixed circuits and optimizing the layout of electrical appliances. The circuit board can be called a printed circuit board or a printed circuit board, and the English name is (Printed Circuit Board) PCB.
3. The circuit boards are divided into three major categories: single-sided boards, double-sided boards, and multilayer circuit boards according to the number of layers.
The first is a single panel. On the most basic PCB, the parts are concentrated on one side, and the wires are concentrated on the other side. Because the wires only appear on one side, this kind of PCB is called a single-sided circuit board. Single-sided panels are usually simple to manufacture and low in cost, but the disadvantage is that they cannot be applied to too complex products.
Double-sided boards are an extension of single-sided boards. When single-layer wiring cannot meet the needs of electronic products, double-sided boards should be used. There are copper-clad wires on both sides, and the lines between the two layers can be connected through via holes to form the required network connection.
Multi-layer board refers to a printed board with more than three conductive pattern layers and insulating material between them laminated at intervals, and the conductive patterns are interconnected as required. Multilayer circuit boards are the product of the development of electronic information technology in the direction of high speed, multi-function, large capacity, small volume, thinner and lighter weight.
Circuit boards are divided into flexible boards (FPC), rigid boards (PCB), and rigid-flex boards (FPCB) according to their characteristics.