Mail Archives: geda-user/2014/07/06/00:12:10
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X-Recipient: | geda-user AT delorie DOT com
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Message-ID: | <53B8CC66.2080909@sonic.net>
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Date: | Sat, 05 Jul 2014 21:11:18 -0700
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From: | Dave Curtis <davecurtis AT sonic DOT net>
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User-Agent: | Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121028 Thunderbird/16.0.2
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MIME-Version: | 1.0
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To: | geda-user AT delorie DOT com
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Subject: | [geda-user] pour clearing around pads
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X-Sonic-ID: | C;9INtlMME5BGPtGuUdPQXfw== M;GNamlMME5BGPtGuUdPQXfw==
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X-Sonic-Spam-Details: | 0.0/5.0 by cerberusd
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Reply-To: | geda-user AT delorie DOT com
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This is a multi-part message in MIME format.
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I'm working on a footprint where if I follow the data-sheet geometry and
my normal design rules, I end up with a footprint where very skinny
copper peninsulas sneak between pads when it is placed in a polygon.
The peninsulas neck down to less than the minimum copper width rule.
So, first off, I'm surprised that the Cu polygon allows Cu to pour into
a space less than the minimum width rule.
Secondly, I'm wondering if fab houses might flag that as a DRC violation
even if pcb doesn't.
Third, is it legal to specify zero-width Pad[] elements in a footprint,
and assign clearance values, in order to composite some clearance into
the footprint? Or is pcb going to get cranky if a Pad[] is zero width? I
could imagine it would be hard to connect to... so I guess it needs to
share a pin number with something else.
footprint work-in-progress attached.
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