After blind/buried holes are done, is it necessary to make plate holes on the PCB?

In PCB design, the hole type can be divided into blind holes, buried holes and disc holes, they each have different application scenarios and advantages, blind holes and buried holes are mainly used to achieve the electrical connection between multi-layer boards, and disc holes are fixed and welded components. If blind and buried holes are made on the PCB board, is it necessary to make disc holes？

1. What is the use of blind holes and buried holes?

A blind hole is a hole that connects the surface layer to the inner layer but does not penetrate the entire board, while a buried hole is a hole that connects the inner layer and is not exposed from the surface layer. These two passes are mainly used to realize the electrical connection between multi-layer boards and improve the integration and reliability of the circuit board. They can reduce the crossing of lines between the board layers and reduce the difficulty of wiring, thereby improving the overall performance of the PCB.

1. What is the use of the plate hole?

Disc holes, also known as through-holes or perforations, are holes that run from one side of the PCB to the other. It is mainly used for the fixing and welding of components, and to realize the electrical connection between the circuit board and external devices.

The disc hole allows the solder wire or pin to pass through the PCB to form an electrical connection with the solder pad on the other side, thus completing the installation of the component and the connection of the circuit.

1. How to select blind/buried holes and holes of PAD?

Although blind holes and buried holes can achieve electrical connections between multi-layer boards, they cannot completely replace the role of disc holes.

First of all, the disc hole has a unique advantage in component fixing and welding, which can ensure the stability and reliability of the components.

Second, for some circuits that need to be connected to external devices, disk holes are indispensable.

In addition, in some complex circuits, blind holes, buried holes, and disc holes may need to be used simultaneously to meet different connection requirements.