Circuit boards are the core components of electronic products. Let’s take a look at the components of circuit boards:
1. Pad:
Pads are metal holes used to solder component pins.
2 layer:
Depending on the design of the circuit board, there will be double-sided, 4-layer, 6-layer, 8-layer, etc. The number of layers is generally double. In addition to the signal layer, there are other layers used to define processing.
3. Via:
The meaning of vias is that if the circuit cannot implement all signal traces on one level, the signal lines must be connected across layers through via. Vias are generally divided into two types, one is metal via, the other is non-metal via. Metal via is used to connect component pins between layers. The form and diameter of the via depends on the characteristics of the signal and the requirements of the processing plant.
4. Components:
Components are soldered on the PCB. The combination of layout between different components can achieve different functions, which is also the role of PCB .
5. Layout:
The layout refers to the signal line connecting the pins of the device. The length and width of the layout depend on the nature of the signal, such as current size, speed, etc.
6. Screen Printing:
The screen Printing can also be called the screen Printing layer, which is used to mark various related information on the components. The screen Printing is generally white, and you can also choose the color according to your own needs.
7. Solder mask:
The main function of the solder mask is to protect the surface of the PCB, form a protective layer with a certain thickness, and prevent the contact between copper and air. The solder mask is generally green, but there are also red, yellow, blue, white, and black.
8. Positioning hole:
The positioning hole is a hole conveniently placed for installation or debugging.
9. Filling:
Filling is copper applied to the ground network, which can effectively reduce impedance.
10. Electrical boundaries:
The electrical boundary is used to determine the dimensions of the circuit board, and all components on the circuit board must not exceed this boundary.
The above ten parts are the basis for the composition of the circuit board, and the realization of more functions still needs to be programmed in the chip to achieve.
If you have any questions, welcome to visit PCBFuture.com.
Post time: Feb-16-2022