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 Exemption from suppresion of unconnected pads
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hippenstiel

Germany
15 Posts

Posted - 08 Aug 2016 :  12:12:48  Show Profile  Reply with Quote
I would like to suppress unconnected pads and vias in general, but I have some exemptions.
For all inner layers, I have Suppress Unconnected Lands for pads and vias checked, but I have a certain pad style that I want to be exempted from this rule.

In chapter Technology - Edit Layer from the online help, it is stated that "[The pad] is suppressed only if there is no explicit pad shape assigned to that layer."
So I added explicit pad shapes for every inner layer to that particular pad style. But the pads still vanish for unconnected layers.

How does this work?

Edited by - hippenstiel on 08 Aug 2016 15:11:26

steve

United Kingdom
316 Posts

Posted - 08 Aug 2016 :  15:07:49  Show Profile  Visit steve's Homepage  Reply with Quote
After investigation, this looks to be incorrect in its working, so I have logged it for review as 41035.

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hippenstiel

Germany
15 Posts

Posted - 08 Aug 2016 :  15:14:45  Show Profile  Reply with Quote
Thanks!
Please let me know as soon as there is a fix for this.
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steve

United Kingdom
316 Posts

Posted - 10 Aug 2016 :  12:18:52  Show Profile  Visit steve's Homepage  Reply with Quote
Can you explain what the technical requirement is for, regarding the need to un-suppress some pad lands on certain pad stacks rather than have them suppressed like all the others?

Also could you confirm that this is required on a component pad, not a via?

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hippenstiel

Germany
15 Posts

Posted - 11 Aug 2016 :  09:18:08  Show Profile  Reply with Quote
Yes this is only relevant for component pads.
It's the other way around. Generally I would like to have the suppression switched off for component pads but on the same pcb is a HV DC-Link, where suppression is beneficial to add a little bit of extra copper in the inner layers.
Reading the online help, I thought unsupressing the other pads would be the way to go, but in the end I solved it, by just adjusting the padstack of the DC-Link capacitors. The capacitors are connected by templates in the inner layers, so they don't need annular rings.
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steve

United Kingdom
316 Posts

Posted - 11 Aug 2016 :  11:36:56  Show Profile  Visit steve's Homepage  Reply with Quote
Thank you for the explanation. The line "" in the Help for pad suppression simply should not be there, it was a function that was not implemented. However, the requirement for setting no suppression and then overriding certain pads as suppressed and visa-versa has been logged as a suggestion, although it would be complicated by the requirement to be different by layer.

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