open-source-silicon.dev

Or could I tell openlane an overlap strategy that it should move/remove TAP cells when they overlap with a cell?

Are you using `sky130_fd_sc_hd`? Using the default settings you should have a gap of 25.08 microns between adjacent tap cells in a row, and the widest standard cell is 16.56 microns wide. Also clkbuf_2 is quite narrow, 1.84 microns in width.

No, hd is too dense for my generator, I switched to sky130_fd_sc_ls . My own CLKBUF2 is 18.72 microns wide

It seems like this particular cell could be layouted in a smaller way, but I would also like to have more complex standard cells in the future which will need more space.

16.56 microns should still fit. Check your floorplan, i.e. openlane/&lt;design&gt;/runs/&lt;design&gt;/results/floorplan/user_project.floorplan.def

You might also increase `FP_TAPCELL_DIST` as long as you stay within the DRC.

I think the DRC rule was something like 12 microns maximum distance, so I guess 22 microns might be the maximum usable for FP_TAPCELL_DIST

I have a default `FP_TAPCELL_DIST` of 13 which gives a somewhat less than 26 for usable space (25.08 actually).

Is there a viewer for the user_project.floorplan.def which can show the positions of the cells? The def file is missing the width's and height's of the cells, and because of that I can only see the IO pads at the top and the bottom

Recent versions of klayout can open these def files directly. Older versions can import them via `File &gt; Import &gt; DEF/LEF`.

Both klayout and magic are only showing the IO pads

If you expand the cell list in klayout's cell panel, do you see the tap cell name there?