The purpose of the various holes on the circuit board?

- Sep 22, 2020-

The vias on the circuit board are just to reduce the area of the pcb board. Now few people use single-sided boards. Of course, single-sided boards are still very marketable for power supplies, but there are still components behind them. To put it bluntly on multilayer boards and double-sided boards Upper perforation

1 is that the sample product is made smaller 2 is to save manufacturing costs


The holes on the circuit board can be divided into plated through holes and non-plated through holes according to whether copper is plated or not. Uses:

Non-plated through holes: generally used for installation and positioning (except stamp holes);

Plated through holes are generally used for connection, soldering, ground isolation, heat conduction, fixing and other purposes (including through holes, blind holes, buried holes, etc.):

a. Connection: there is an insulating layer between different layers on the circuit board, and the connection of the required points requires hole copper plating connection;

b. Soldering: When PCBA chooses plug-in devices, holes for soldering are needed, generally for connecting with devices and forming better mechanical strength, etc.;

c. Ground isolation: There are various paths on the circuit board. When a current flows, an electromagnetic field will be generated, which will affect each other. In the design, some holes will be considered to be the same as the ground to form isolation (EMC requirements);

d. Heat conduction: Generally, high-power devices will generate heat when they travel far, and the heat sometimes needs to be dissipated from the other side of the circuit board, and some holes need to be designed to conduct through copper to the back;

e. Fixing: such as screw holes.


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