Multi-Layer Board Via issue (EAGLE)

[chipmonk1027]

Hi Guys,

I am designing my first multi layer board with eagle, and I noticed something really really strange. Well you declare the types of vias (blind and buried), then when routing I would have expected eagle to show an error when I move between two layers that have no via declared in the layers setting.. Ok am sure that's quite difficult to understand so I have attached my Layer settings and... what I mean is if I move from layer 2 to layer 16 eagle will just place a via... but look at the layer settings there is no buried via that connects those two layers. Whats the issue there?

 

[FvM]

I'm skipping the question if your stackup definition is reasonable and if blind vias can be produced with the intended substrate and prepreg dimensions.

Your PCB has a via through all layers, it can of course connect layer 2 to 16.

 

[Mattylad]

When a blind or buried via is not chosen it will default to the through hole via that spans the entire layer stack.

Do you really need B/B vias?