Mail Archives: geda-user/2019/09/14/02:02:27
Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
> I'm just trying my first pcb board with blind vias. The rendering in
> pcb is great.
>
> The produced gerbers look like they're probably right, but when I use
> gerb the only place I can actually see anything related to the buried
> vias is in the board_name.fab.gbr file, and the view of it doesn't
> show anything about from/to layers. The board_name.top.gbr and
> board_name.bottom.gbr files contain many lines like for example:
>
> X434601Y487516D01*
> X434765Y487324D01*
> X434957Y487160D01*
>
> which look like they represent the buried vias and their destination
> layer (D01 part), but they don't show up under gerbv
> boad_name.top.gbr.
>
> I would assume this was just a gerbv problem except that my fab just
> tried to change my board from their Blind/buries vias type to their
> through-hole type, so it looks like maybe they aren't seeing the
> buried vias either.
>
> Am I missing something about BB vias, or might there be some real
> problem with the gerbers?
>
> Thanks,
> Britton
>
>
Hi Britton,
AFAIK, you're the first user trying to get a board with bbvias to a fab.
I will try to look into this this evening/tonight (UTC+2), and this Sunday.
I did some visual verification on gerbers and other generated files when
this feature went into pcb, recollection of all the details fails me at
the moment.
I did do a layout with bbvias, but never send it to a fab house.
There are some small quirks in pcb, like the png exporter showing pins
on the bottom layer, when they are not present at that layer (LP1746103).
Connectivity and DRC (FWIW) was ok though.
Could you send some gerbers (or parts thereof) as to verify these are
correct or not.
Kind regards,
Bert Timmerman.
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