Visit：1614 Date：2020-08-24

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.　　

The circuit board window is the solder mask window, which means that the solder mask is not covered.
The window of the solder mask is in the top solder layer (or bottom solder layer). You can select the copper pour tool and drag the corresponding pattern where you need it. Although the copper pour tool is also used, it is not copper pour. It just means Do not solder mask in the circled part, and there is no concept of network.　
1) Top solder is a soldering layer, that is, where there is this layer, there is no green oil. If there is a line, it will be sprayed with tin. The place without a line is a light board. Usually this layer is combined with a line layer, and it can be used Make tin treatment.
2) The top paster is a steel mesh layer, which is made by a steel mesh factory.　　

Confusing points: 　　
1) Use the top pasete layer as a solder layer, and draw a paster layer where the tin is to be applied. As a result, the pasete layer is used without windows.
2) It is wrong to use the solder layer as a circuit layer together with the soldering flux layer. It is wrong to think that there are circuits and windows where there is this layer.