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Date:	Mon, 26 Aug 2013 21:24:45 -0800
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Subject:	Re: [geda-user] keeping solder mask off thermal rectangles?
From:	Britton Kerin <britton DOT kerin AT gmail DOT com>
To:	geda-user AT delorie DOT com
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On Mon, Aug 26, 2013 at 12:33 PM, Russell Dill <Russ DOT Dill AT asu DOT edu> wrote:

> On Mon, Aug 26, 2013 at 11:04 AM, Britton Kerin <britton DOT kerin AT gmail DOT com>
> wrote:
> >
> > I've got a part with a thermal pad on the bottom of a SOIC package.
> >
> > I was able to create rectangles on the solder and component sides of the
> > board, then connect them with vias, and turn the vias into thermals with
> > complete connections using thermal tool and shift-click.
>
> Pretty sure you want to *not* use thermals in this case, just a solid
> connection.
>

You are right.  I used the wrong term here, probably because pcb itself sort
of does: to make a good thermal connection between top and bottom
rectangles,
you make a via, then turn it into a "thermal" with the thermal tool, then
shift-click
repeatedly to modify the thermal style to make it a solid connection, which
isn't
really a thermal in the normally understood sense, if I understand
correctly.

This is a case where pcb is sort of hiding some desirable functionality, I
think.

Britton

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<div dir=3D"ltr"><br><div class=3D"gmail_extra"><br><br><div class=3D"gmail=
_quote">On Mon, Aug 26, 2013 at 12:33 PM, Russell Dill <span dir=3D"ltr">&l=
t;<a href=3D"mailto:Russ DOT Dill AT asu DOT edu" target=3D"_blank">Russ DOT Dill AT asu DOT edu<=
/a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex"><div class=3D"im">On Mon, Aug 26, 2013 at 11=
:04 AM, Britton Kerin &lt;<a href=3D"mailto:britton DOT kerin AT gmail DOT com">britto=
n DOT kerin AT gmail DOT com</a>&gt; wrote:<br>

&gt;<br>
&gt; I&#39;ve got a part with a thermal pad on the bottom of a SOIC package=
.<br>
&gt;<br>
&gt; I was able to create rectangles on the solder and component sides of t=
he<br>
&gt; board, then connect them with vias, and turn the vias into thermals wi=
th<br>
&gt; complete connections using thermal tool and shift-click.<br>
<br>
</div>Pretty sure you want to *not* use thermals in this case, just a solid=
<br>
connection.<br></blockquote><div><br>You are right.=A0 I used the wrong ter=
m here, probably because pcb itself sort<br>of does: to make a good thermal=
 connection between top and bottom rectangles,<br>you make a via, then turn=
 it into a &quot;thermal&quot; with the thermal tool, then shift-click<br>
repeatedly to modify the thermal style to make it a solid connection, which=
 isn&#39;t<br>really a thermal in the normally understood sense, if I under=
stand correctly.<br><br>This is a case where pcb is sort of hiding some des=
irable functionality, I think.<br>
<br>Britton <br></div></div></div></div>

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