Best way to draw "via in pad plated over" VIPPO in Altium?

[rf-fil]

Damn these little BGA's, lol.

VIPPO is where there is a BGA pad on the surface of the PCB, but then there is a filled-in via underneath that runs through the PCB. It's the only way to fan out small BGAs - not enough room for a dog-bone pattern. But, there doesn't seem to be obvious way to combine a pad and a via in Altium to produce a VIPPO. The 3D render and Gerbers show a hole if I just put a via over a pad. Another way - a multi-layer pad with a through hole also doesn't have an option to plate over the top.

Any tips? This seems to be pretty common but a first, for me.

[Psi]

Just FYI for later, if using pcbway for your PCB, their website is a little confusing on this.

The website option you want is called "Via in pad/ Via filled with resin"
It includes capping/plating over top with copper, but that isn't obvious unless you click the ?

The option "Via filled with copper" is NOT what you want, that's only for microvias on HDI boards. Not via in pad.

[JohnG]

Unfortunately, I don't think Altium allows specification of filled and plated vias, though they should given what the software costs.

FWIW, what you are asking for is an IPC Type VII via, as it is described in the IPC-4761 Standard.

As far as spec'ing them, I use the method described by evb149:

You can do something like make their TH size some slightly "off" odd number like 7.96mil vs 8.0mil or something so they will show up differently in a grouping on your drill drawing with a distinct symbol if that helps you find them and call them out to your manufacturer for plug / plate.

John

[free_electron]

you can set the via type to 4761 VII in the properties dialog

[JohnG]

I do not appear to have this option. I'm using Altium 19 at the moment. Is this a new feature?

John

[free_electron]

you are a couple of versions behind... need 21

[rf-fil]

Thanks, setting the via type to 4761 VII sort of works (I switched to v22). It adds "capping" and "filling" layers which then get exported in the gerbers, for the PCB fab. The only thing that doesn't work for me is that these vias still render as through-hole in the 3D mode. A half-done feature is still better than none - keen for Altium to finish this though.