PCB design software Altium Designer through hole (through hole, blind hole and buried hole) related Settings

Today's electronic components are increasingly designed for miniaturization and high density. The most obvious benefit is to save fuel and energy. In a way, it also gives engineers more design space, but with mixed results. Miniaturization design in the production process requirements, technical difficulties increase, and in the engineer design, sometimes too small space will introduce some trouble. Especially for PCB board design, because more and more components adopt BGA package, PCB routing becomes a difficult problem. In order to solve the problem of PCB routing, blind hole and buried hole appeared in PCB production process.

 

Before we go on to say Blind vias and Buried vias, let's recall that the through-hole on a PCB is the most commonly used way we connect layers of a PCB with each other. In fact, we often say through hole is through hole. Here is the difference in the diagram.

Buried vias

The appearance of blind hole, buried hole, gives engineers more design space, because it does not walk the layer, engineers can use to walk other lines. Of course, these designs are usually used only when they are not necessary, because the manufacturing cost of blind hole and embedded hole in PCB will increase a lot, and the difficulty of later maintenance and inspection will also increase, so it is not necessary to use blind hole and embedded hole as far as possible.

Okay, so that's the introduction to via. Let's look at how PCB design software (Altium Designer 18 as an example) works.

pcb layer


Design=>Layer Stack Manager... (or press the shortcut key DK), the following interface will appear:

pcb design


Click (Drill Pairs...) within the circle again ), the following figure will appear:

As you can see, the default through hole is the through hole. It is the Start Layer to Stop Layer, which corresponds to the Top Layer to the Bottom Layer. Now click Add... To add blind or buried holes. Click and the following picture appears:

pcb drill 

As you can see, the default through hole is the through hole. It is the Start Layer to Stop Layer, which corresponds to the Top Layer to the Bottom Layer. Now click Add... To add blind or buried holes. Click and the following picture appears:

Drill-pair properties

If you select Top Layer to Singnal Layer 1, it corresponds to the previous image. Obviously, this is the so-called blind hole. In the same way, add the buried hole, namely Singnal Layer 1 to Singnal Layer 2, and also click OK. Then the following image will appear:

Singnal PCB

So this is the type of hole that we put in. The work is basically completed, you can click OK step by step to exit to the PCB design interface. On the PCB design interface, we put three holes, from top to bottom, and then click each hole respectively. Clicking the hole will bring up the dialog box on the right side of the following figure:

pcb printed circuit board design

In the Drill Pair of Properties, we selected the type of through-hole we just set. From Top to Bottom, the first is the through-hole, that is, the Top Layer to the Bottom Layer, the second is the blind hole, that is, the Top Layer to Singnal Layer 1, and the third is the buried hole, that is, the Singnal Layer 1 to Singnal Layer 2. The color of the hole also shows the relationship between the beginning layer and the end layer.