Hello,
I’m contacting you because I’m getting several warnings about vias that are either not connected or only on one layer. I don’t really know what I can do to make these warnings disappear. My teacher advised me to put vias like this so that the two zones are well connected. As you can see, it’s only the vias with the ‘SUP_PROTECTED’ net that have this problem, the others that are just next to ‘GND_P’ don’t have this problem.
Thanks in advance
John
KiCad won’t connect different nets together using vias and SUP_PROTECTED and GND_P are different nets. I assume the blue zone on the bottom layer is a GND_P zone, so you can’t connect the SUP_PROTECTED zone on the front layer and the GND_P zone on the back layer with a via.
If you actually want to connect them (you probably won’t), I guess the best solution would be to make everything GND_P, but then the separation lines on the front layer would be useless. Otherwise, you need to be clear what you want to do.
Thanks for your reply.
In fact, I created two plans: a ‘GND_P’ ground plane which is on both layers (bottom and forward) and a ‘SUP_PROTECTED’ copper plan only on one layer (Forward) (in red). The copper plane has a higher priority than the ground plane. So, for me, that wasn’t a problem. What do you think?
My question is again what do you want the result to be? If you want the SUP_PROTECTED plane to be only on the front side, adding vias to the back side doesn’t make sense as there’s nothing to connect to. If you want to connect to something on the back side, you probably also want to change the SUP_PROTECTED plane settings to be also on the back side.
If you’re not sure, maybe clarify things with your teacher?
That wasn’t a problem. You can have several planes with different priority at one layer. The problem is that only the same net pads, tracks, planes, vias can be connected together. If you connect with vias copper belonging to different nets you make it being the same net. So you should make it clear from schematic that it is one net or not connect them at PCB.
When you place via in the place where at one layer you have different net plane than on the other and then you avoid refilling planes you will get PCB with them being connected but it is not the right way to design PCBs.
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