create custom via and save it

Priyankar,

Which IC version are you using? Type getVersion(t) in the CIW...

The create via form changes quite a bit from one version to another, so it's important to know. I didn't see an option to save a custom via on the create via form in IC617 ISR8, but I may have been looking at the wrong thing or may be using a completely different version to you.

Regards,

Andrew.

Andrew,

This is the IC version that i am using "sub-version  IC6.1.6-64b.500.14.EHF2305 "

This is the snapshot of the save via variant

Regards,
Priyankar

OK, you were talking about saving via variants, not custom vias. I wondered whether that was what you meant, but given you were talking about "icfb" (which the tool has not been called since IC611 or so) threw me.

If you pick the option to save to the design, you must give a name for the new via variant, and then you must save the design before exiting virtuoso. Having done that, in the next session I see:

In other words, pick on the drop-down on the cyclic field, and ensure that you press the + in the tree next to the via that it was a variant of - and you should see all your saved via variants. A via variant is just a via with a set of parameters.

In this case, I called it myM2M1 when I saved it. Of course, it has to be a variant of a via that is in the currently active validVias constraint for it to show up.

Regards,

Andrew.

Priyankar,

The form I showed was in the session of virtuoso having quit and restarted. So it was working fine for me.

You should be able to see them if you open your design and do:

geGetEditCellView()~>viaVariants~>??

If they're not there - did you really save the via variant and save the design before quitting Virtuoso? I'm also assuming  you're opening the same design (if you saved to design).

Regards,

Andrew.

Andrew,

i did save it but when i restart the icfb i see only the via i have placed whne i open create via i dont see that via option available any more ...

This is the snapshot showing via placed but not coming under create via options.

Regards,
Priyankar

Hi Priyankar,

In the tree in the drop-down list on the left side there's a [+] next to contPSD_OA. Click on that [+] to expand it (it will then show [-]). Then you should see it. In my picture I was showing the expanded tree, whereas you're seeing the collapsed tree which is what appears by default.

Regards,

Andrew.

Hi Priyankar,

When you save a viaVariant into a design, it's only for that design. You'd have to save it to the technology library if you want to share it amongst multiple designs (you could always create your design library to reference the technology library rather than attaching it, and then  you would be able to save into your own technology library - this is the ITDB mechanism).

Currently the "Load Physical View" command in VLS XL doesn't support loading via variants from another design - there's CCR 1062215 asking for this, but it hasn't been implemented yet. If you want this, please contact customer support so that a duplicate request can be filed.

I do have some SKILL code written by a colleague a few years back to transfer via variants from one design to another, but I'm not sure it's quite in a fit state to publish here.

I am also rather doubtful that "close data" could lose the saved changes (unless you didn't actually save the cellView; note that the save icon on the create via form doesn't actually cause the cellView to be saved to disk - it just stores the viaVariant in the cellView; you must hit the save icon in the layout editor to actually save the changes). Maybe you didn't save the cellView.

Regards,

Andrew.