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From: "Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date: Sun, 15 Sep 2019 22:29:26 -0800
Message-ID: <CAC4O8c8_g4==-U6Y_CgjKRzpce+PLg1B3iR5qHi2amoRB6+zHg@mail.gmail.com>
Subject: Re: [geda-user] blind vias, gerbers and gerbv
To: geda-user AT delorie DOT com
Content-Type: text/plain; charset="UTF-8"
Reply-To: geda-user AT delorie DOT com

On Sun, Sep 15, 2019 at 5:00 AM Chad Parker (parker DOT charles AT gmail DOT com)
[via geda-user AT delorie DOT com] <geda-user AT delorie DOT com> wrote:
>
> On Sat, Sep 14, 2019, 14:20 Bert Timmerman (bert DOT timmerman AT xs4all DOT nl) [via geda-user AT delorie DOT com] <geda-user AT delorie DOT com> wrote:
>>
>>
>> The gerber files for copper, soldermask, silkscreen and outline should
>> not differ from a pcb with through hole vias.
>
> This isn't *quite* true. There should only be copper pads in the Gerbers on the layers that intersect with the layers of the blind/buried via.
>
>> I get the following drill files for connecting the copper layers with
>> bbvias:
>>
>> test.plated-drill.cnc
>> test.plated-drill_01-02.cnc
>> test.plated-drill_03-06.cnc
>>
>> Can you try this and see if you get similar drill files ?
>
>
> Based on your original message, this would be the first thing I'd check. You should have a separate drill file for each layer pair associated with a blind/buried via.

This was it.  I entirely missed these in highly cluttered project dir
and my build system didn't package them for fab.

> On each copper layer the via goes through, there should be a copper "pad", just like with normal vias. But only on those layers.

Ah it turns out these are present, just not visible because they land
in pours.  So looks like all my mistakes.

Thanks everyone for help.  I'll report back after the boards are made.

Britton