About putting vias as stitching vias that disappear later on

[mulfycrowh]

Hi everyone,

I have put a lot of vias on my design yesterday.
I used standard vias as shielding vias.
I didn't use the option Tools > Via Stiching Shielding.
I find the automatic process not so good.

Today all my vias have disappeared!

Any idea?

Thanks

[mulfycrowh]

I am trying the automatic process.
AD places vias too much close from differential pairs and triggers clearance violation.

Is there a setting to avoid this?

[qdrives]

I once had that all my ground traces and vias were gone. Probably I was deleting some test layout and pressed the tab key twice, hit delete and all was gone.
Luckily, not that much was routed so I could copy it all from one of the backups.

[Paul van Avesaath]

not really sure what happend to your design, but if you enable the pcb backup functionality it saves a copy every X minutes of your design upto a certain amount you specify so you will not loose any work i usually have it set to 3 versions with a 10 minute interval.

[mulfycrowh]

robertferanec Robert, how do you proceed with shielding vias on 12 or 16 layers projects?
I tried automated process but got many clearance violations.
Doing it manually is time consuming but you have a clean job.

[robertferanec]

mulfycrowh I have never used automated via placement.

[mulfycrowh]

Is there a way in AD to add GND shielding vias based on the remaining possible locations?
I am asking because with a 12 layers, it is very time consuming to do it manually.
I think about the ability to define a disk centered on a via where other vias would be forbidden.

[mulfycrowh]

The more you add shielding vias, especially on very dense design, the more you get issues with power supplies planes.
How do you manage them?

[robertferanec]

The more you add shielding vias, especially on very dense design, the more you get issues with power supplies planes.
How do you manage them?

- if there is no other option (e.g. bigger PCB, moving power supply closer to the load), then I try to find a compromise or sometimes e.g. under CPU, there is not really much to do.

[Abdullah Ansari]

You Can also do copy paste. Copy the via and go to Edit ---- paste special----Tick paste on current layer and copy net name ---- Paste array---- change item count --- and X grid.

[Abdullah Ansari]

Hi everyone,

I have put a lot of vias on my design yesterday.
I used standard vias as shielding vias.
I didn't use the option Tools > Via Stiching Shielding.
I find the automatic process not so good.

Today all my vias have disappeared!

Any idea?

Thanks

May be u have added stitching via on the trace and after adding while routing when you add another Via on the same trace then it will get removed.