Now the main board and the graphics card of the PCB board use multi-layer circuit boards; the area that can be wired is greatly increased, and the tips for quickly distinguishing the number of layers of the main board circuit board! Let's understand together.
The circuit connection of multilayer circuit boards is through buried hole and blind hole technology. Most motherboards and display cards use 4-layer PCB boards, and some use 6-, 8-layer circuit boards, or even 10-layer PCB boards. If you want to see how many layers the PCB board has, you can identify it by observing the guide holes because the 4-layer circuit board used on the motherboard and display card is the first and fourth layers of wiring, and the other layers have other purposes (ground) cord and power supply).
Therefore, like a double-sided circuit board, the guide hole will penetrate the PCB board. If some guide holes appear on the front of the PCB but cannot be found on the back, then it must be a 6/8 layer board. If the same guide holes can be found on both sides of the PCB, it is naturally a 4-layer circuit board.
Tips: Face the main board or display card of the PCB board to the light source. If the position of the guide hole can transmit light, it means that it is a 6/8-layer circuit board; otherwise, it is a 4-layer circuit board.
