Reduce the number of PCB prototype layers can greatly reduce costs, to determine the number of layers of PCB is a must master skills. Here we will introduce some methods to determine the number of PCB layers.

1, visual method. Carefully observe the insulation layer of the board, the insulation layer between layers will become the most intuitive way for us to determine the number of layers of PCB.

2, guide hole and blind hole on the light method. Guide hole to identify the number of layers of PCB by using guide hole on PCB. The principle is mainly due to the multilayer PCB circuit connection using the hole technology.

We can also supply the high quality PCB, if you need, pls contact us.