open-source-silicon.dev

I also added a couple of inductors into MPW-B. The best I could do for modelling was to use ASITIC.
I wish there was a good open source method of moments simulator. I would love to have a crack at that myself but have no time currently

FastHenry is a pretty good 3D field equation solver for layout.  There is also Space from TU Delft, which became open source last year.

When I tried FastHenry it did seem good at what it did but the trouble is it only calculates inductance (as far as I know) which is troublesome when you want to know where the self-resonant frequency is. In my experience you tend to want to operate as close as you can to SRF for best performance.
I haven't tried space, I will definitely give that a shot

<@U016EM8L91B> I don't suppose you've got a link to that software? The search terms seem to be too general. Also doesn't help that Delft is quite active in space mission design

<@U016H5X1K62>  could it be this one? <http://www.space.tudelft.nl/|http://www.space.tudelft.nl/>

That looks really capable. Thanks for the link.
Will have a dive into the examples

Hmmm, seems you need to apply for a license to get it working and it also feels like the license provisioning has been abandoned.
I can't seem to find any mention of being open source but I may email some of the authors

<@U016H5X1K62> <@U016EM8L91B> Just wondering how the structure fro ASITIC or Space or Fasthenry was copied into as a design. Is it integrated in Magic as <@U016H5X1K62> mentioned or one has to draw with hand once the structure is generated ? I am also looking for a method to synthesize custom inductors

<@U016H5X1K62> :  I think the open source version was posted on github.  I know someone who was using it and made a fair amount of progress setting it up with the Skywater process.

<@U017RJAP56E>:  Generally it works the other direction;  you create the layout in a layout editor and extract the geometry and plug it into a 3D solver.  I put some hooks between magic and FastHenry with the "extresist fasthenry" command option.

<@U016EM8L91B> you're right, I just managed to find it: <https://github.com/space-tudelft/cacd|https://github.com/space-tudelft/cacd>
Will compile it and try it out

<@U017RJAP56E> ASITIC has a CIF output but the angles were kind of odd (not 45) so I imported the CIF to klayout and used it as a template to essentially trace over but I could ensure the design rules were followed. A bit manual but still pretty quick

<@U016EM8L91B> Yes, I have also followed the same flow. Previously, we had a Helic tool to generate the inductor of need (L and Q and metal layer) and extract the S parameter using EMX. Although pdk had inductor pcell, I have found this far from optimum so the above flow was perfect. But yes all were commerial tools. if there was a way using open source tool to create the Inductor which could somehow be ported to the pdk one part of this step is addressed.

<@U016H5X1K62> I will try it out.  A little bit of manual intervention is no problem. Thanks!