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Date: Sat, 18 Mar 2017 17:48:58 +0100
From: Kai-Martin Knaak <kmk AT familieknaak DOT de>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] [pcb-rnd] tEDAx footprint load support
Message-ID: <20170318174858.5aba44d1@akka>
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"miloh (miloh AT froggytoad DOT net) [via geda-user AT delorie DOT com]"
<geda-user AT delorie DOT com> schrieb am 14. March 2017:

> Why not set plating to '0' for a unplated hole that is treated as a
> mounting hole?

I avoid nonplated holes in footprints because they tend to add to the
cost. The manufacturer needs to run the boards through the drilling
process twice - once before plating and again after plating. If all
holes include plating, this second run can be skipped. Consequently, some
fabs offer lower prices if the design contains no nonplated holes.


> Blind and buried vias are an interesteing topic, but to me not
> relevant to footprint support - what do others think?

A use cases would be footprints which come with ready made layout
stubs. This could be handy for BGA components, or certain densely packed
connectors. Blind vias may also allow for certain RF structures to be
defined as a footprint.

When in doubt, I'd rather not restrict what can go into a footprint.
If footprints could contain anything a complete layout can it would be
possible to build and use ready to use layout blocks. Footprints could
contain footprints, very much like symbols can contain symbols in gschem.

---<)kaimartin(>---
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Kai-Martin Knaak
Email: kmk AT familieknaak DOT de
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