I watched a video on via basics by PhilsLab (Video: https://www.youtube.com/watch?v=WPT96w3eLAM), in which he discusses transfer vias. He presents the following picture to explain why you should place them:
He then provides an example in a PCB software:
Questions
- I want to place transfer vias on signal traces when they switch layers (as mentioned in his video.) I'm uncertain if I understand the concept correctly. Let's say I have a 6-layer PCB. On the first layer, I place signal traces, and on layer 6, I also place signal traces. Now, if I need to transition from layer 1 to layer 6, I would position the GND via as close as possible to the switching via. Do I also need to have a GND layer on the first layer? In Picture 1, the GND via doesn't seem to be connected to the signal layers. It is only connected to the GND layer. Based on this, my understanding is that I should replicate this setup. What is your opinion? Below is an image illustrating how I implemented this in KiCad V7.
- Should I apply this technique to a 6-layer board?