PCB circuit board (printed circuit board), also known as printed circuit board, printed circuit board, referred to as printed circuit board, English abbreviation PCB (printed circuit board) or PWB (printed wiring board), with insulating board as the base material, cut into A certain size, with at least one conductive pattern attached to it, and holes (such as component holes, fastening holes, metallized holes, etc.) are used to replace the chassis of the previous electronic components and realize the connected to each other. Since this board is made by electronic printing, it is called a "printed circuit board". It is inaccurate to call a "printed circuit board" a "printed circuit" because there are no "printed components" on the printed circuit board, but only wiring.

It is an important electronic component and a support for electronic components.

The printed circuit board is not a general end product, and the definition of the name is slightly confusing.

For example, the motherboard used in personal computers is called the motherboard, but not directly called the circuit board. Although there are circuit boards in the motherboard, they are not the same. Therefore, the two cannot be said to be the same when evaluating the industry.

Another example: because there are integrated circuit parts loaded on the circuit board, the news media calls it an IC board, but in fact it is not the same as a printed circuit board. When we usually refer to a printed circuit board, we mean a bare board—that is, a circuit board with no components on it.

Classification according to the number of circuit layers of PCB printed circuit boards: PCB printed circuit boards are divided into single-sided, double-sided and multi-layered boards. Common multi-layer boards are generally 4-layer boards or 6-layer boards, and complex multi-layer boards can reach dozens of layers.