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 Post subject: Pads are changed, if the Layer is defined as Plane
PostPosted: 12 Jun 2012, 09:17 
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Joined: 21 May 2012, 16:05
Posts: 38
Dear DipTrace team,

I am not sure if this is a feature or bug. But I see is it as a bug.

If I change in the "Layers Setup" the "Layer Type" from Signal to "Plane" the Pads are immidietly changed. See in the attachment the pictures. So you can see what is happening.

Stefan


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 Post subject: Re: Pads are changed, if the Layer is defined as Plane
PostPosted: 13 Jun 2012, 08:42 
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Technical Support

Joined: 14 Jun 2010, 06:43
Posts: 1501
This is not bug, it is feature.
Plane layers are always internal layers. They are not visible and there is no sense to keep rectangular pad size on internal plane layers. If we change it to round, we give more room for plane copper pours.
But if you need the same rectangle shape as on top layer, place copper pour on plane layer and connect it to pads.


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 Post subject: Re: Pads are changed, if the Layer is defined as Plane
PostPosted: 13 Jun 2012, 09:50 
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Joined: 21 May 2012, 16:05
Posts: 38
Hey Alex,

the plane layers are not always on the internal layers, sometimes you need to build a capacitor with the stack up of the pcb and you need sometimes the external layer as plane. I think it's a good feature you have, but it is just not made completely right.

I think you are trying to create the "Pad removal" feature for the internal layer. You can use this feature to increase the plane area. But you need to remove the pads in the in-layers too.

The problem is sometimes you can't use this feature, because of the component design, especially in High current and High Voltage design. It's ok for that kind of components if pads are round in the in-layer but it's not good if it's done in external layers as well.

You are right, I can create in Signal layer a copper pour, so I can keep the original pads, but I can't use it, because is not possible to overlay to different copper pours without getting problems.

Stefan


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 Post subject: Re: Pads are changed, if the Layer is defined as Plane
PostPosted: 14 Jun 2012, 09:11 
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Technical Support

Joined: 14 Jun 2010, 06:43
Posts: 1501
If you want to keep pad shape on internal layers, do not change layer type from signal to plane. Differences between two layer types are minimal.


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