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How to insert a Blind Via in Eagle PCB Design?

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alex_cruz3WNEK
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How to insert a Blind Via in Eagle PCB Design?

I am trying to insert blind vias in my PCB design to stitch copper polygons on the bottom layer (layer 16) to inner planes on layers 14 and 13 as shown in the layer stack manager in the attached image. When I enter the VIA command, I only see the option to insert a through-hole (1-16) via (see attached image), but I don't see any options to insert the blind vias (14-16) (13-16) that I had defined in the layer stack manager.  I am not sure if this is a bug or if there is something additional that I must do. I have already applied the changes in the layer stack manager. I have also tried changing a through-hole via (1-16) using the CHANGE VIA command but to no avail. 

alex_cruz3WNEK_0-1699896261965.png

alex_cruz3WNEK_1-1699896314806.png

 

 

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Message 2 of 3

Ok, so after a few hours of troubleshooting, I was able to insert blind vias only if there were a symmetric pair of blind vias, e.g. a blind via from layer 16 to 14 would require a corresponding blind via pair from layer 1 to layer 3 and vice-versa as shown in the image below.  I don't know if this is a bug in the current version of Fusion that I am using (v. 2.0.17457) or an intended feature, but I think it's ridiculous  that there is a lack of documentation on how to manually insert a blind via given how important it is for high-density boards that require copper pours, stitching, routing, etc.

alex_cruz3WNEK_0-1699912908866.png

 



Message 3 of 3

Hello @alex_cruz3WNEK,

 

I hope you're doing well. How did you insert these configurations? Having a symmetrical configuration is not necessary. If you click on the add via configurations icon on the top left you can just specify what layers you want the via to travers.

If you tried to do this with the old string method, then I can see why you could have this confusion.

 

Let me know if there's anything else I can do for you.

 

Best Regards,



Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

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