Robert,
Thanks for the reply. Power and ground on a two layer can be a challenge,
especially if you have to do it last. Good luck.
Auld.Timer
Danilo Uccelli <[EMAIL PROTECTED]> wrote:
2007/9/6, Robert <[EMAIL PROTECTED]>: > Just to make
sure I understand. Connecting pins to an internal layer
> using vias and then filling the plane is not recognized as a
> connection by the connection tool. Is that right? If so, how do I
> know if there are missing connections to the plane?
Power planes are a bit of a weak point with KiCAD, and my only major
bugbear. Obviously the dozens of power nodes will be scattered all
over the board, and it's a big plus if you can connect them up with
power planes first. This is especially true of double-sided boards,
where you need to ensure you don't end up with isolated islands of power
plane.
With KiCAD you will need to leave connecting the power nodes until last,
and pray that you spot any isolated islands before it's a real problem
to connect them again. Then you'll need to hook up the power nodes
with tracks so the DRC passes. I'm doing that right now on a
(double-sided) board, and I've elected to use a 5 thou track and 10 thou
grid to do that, so I can squeeze the connections through all the twists
and turns the power plane takes.
Regards,
Robert.
Hi,
Personally, I do not find that it is really a limitation.
For questions of electromagnetic compatibility, the ground plane is very
important, it should be prevented that connections of GND, which must be close,
are done by turnings.
For that I start by tracing the connections of GND by using a width track
acceptable, thus I have a good vision of netting. Then I trace the other
tracks, the DRC are now correct.
At the end I generate the zones.
Sometimes that needs a few more VIAs on signal tracks.
I obtain this way a layout of good quality on EMI level.
Just my 2 cents...
Regards.
--
Danilo Uccelli
CH-2400 Le Locle
[EMAIL PROTECTED]
---------------------------------
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