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Date: Fri, 30 Jan 2015 19:03:03 +0100
From: Bernhard Kraft <kraftb AT think-open DOT at>
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 Content preview:  Hi, First I would like to say hello as this is my first post
    to this list. Until now I only contributed some gschem symbols to the geda
    project: http://www.gedasymbols.org/user/bernhard_kraft/ I have a question
    regarding a simple 2 layer board. Usually I etch prototypes at home so I
   already have some homebrew-design-rules like not placing a via under a SMD
    component, etc. [...] 
 
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Subject: Connecting GND planes
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Hi,

First I would like to say hello as this is my first post to this list. 
Until now I only contributed some gschem symbols to the geda project:
http://www.gedasymbols.org/user/bernhard_kraft/

I have a question regarding a simple 2 layer board. Usually I etch 
prototypes at home so I already have some homebrew-design-rules like not 
placing a via under a SMD component, etc.

To simplify describing the problem here is a picture of a part of a PCB:
http://picpaste.de/screen1-Bp7Roqnq.png

Ok. Looks like I am almost finished. Only one ratsnest to route. But if 
I route the remaining rat the following happens:
http://picpaste.de/screen2-ZR9DJ7G6.png

The new trace stopped the top-GND polygon (green) from flooding the area 
as it is (unintentionally) isolated by top-CU traces.

I already tried placing vias into the isolated areas, I tried it before 
and after isolating it with the last trace. I tried different thermals 
onto the via - no way.

Is this a bug? Should it get reported? Is the only workaround to 
manually draw additional polys and connect them with vias?


greetings,
Bernhard
-- 
Wer nicht gelegentlich auch einmal kausalwidrige Dinge zu denken vermag,
wird seine Wissenschaft nie um eine neue Idee bereichern können.
Max Planck (1858-1947)