Go to Setup | Design rules | Default | Routing and move your new available via to the selected vias side.
That option doesn't exist for me (see below):
For reference, I'm on the PADS ES suite running Layout (and Router, and xDX Designer) VX.1.2
EDIT: I tried adding the "Design Rules" button to my toolbar using the "Customize" menu, but after placing it, it's greyed out and I can't open it. I'm guessing it's because rules are handled through the "Constraint Manager" now, but I have no idea...
Under the Constraint Manager, I see some via rules (none of which seem to preclude the use of a via with the above dimensions), but the same thing happens within the constraint manager as Layout itself - when I select "ROUTING" as the default via type and press apply, it defaults back to STANDARDVIA.
If I look at the "Via Spans..." menu option, I can change the default via type to ROUTING, but to no effect.
I created a service ticket on this and received the the following answer:
"One of the differences between the Netlist and Integrated Projects is that you can only have one via assigned to a net in Integrated. You can use multiple partial vias when routing, and use a different via in Router if using Component Rules, but that via will only follow the Component Rules. This difference is explained in the Netlist to Integrated Project Migration Guide for VX.1.2. – this is an important document – if you have not read it you might want to get it from the Download page on SupportNet. It is too large to email to you.
In VX.2 we have added Board Edge and Copper Clearance rules."
I Spoke with the support engineer on the phone and she added that you can have multiple partial vias per net, only one through via. I changed my smaller via to a partial via type in the pad stack editor but kept the top to bottom layer pair assignment. It let me do this, but the via does not show on the via list now under either partial or through via list.
Mentor also said that Router will allow component constraints to assign a different via under a via than in general routing for the net.
We think this change is for the worse with only the option of one through hole via per net. The only way to get around this when you for instance need to use 2 different sizes on one net is to do the routing (preferable the smaller one first) then change the via under the Constraint Manager to the other one. After you done change in CM you may now shift the ones in the layout.
I was actually hoping this was something that would be changed by now, I really do not want to go back to a netlist flow
I have way too much time invested in Integrated Flow now.
But not being able to assign and easily use more than one via size on any net in the board is kind of a major
problem for many designs we do.
Is there any chance Mentor will be fixing this any time soon???
Can't believe his is something that got left out of Integrated Flow.
Looks like this is supposed to be fixed in VX.2.3 next quarter:
dts0101199454 - Relax rules to add any VIA in integrated flow design