<@U01RSNFAM55> <@U016EM8L91B> <@U016HSAA3RQ> There...
# ieee-sscs-dc-21q3
m
@User @User @User There is a std cell named sky130_fd_sc_hd__clkdlybuff4s15_1, It has DRC error near pin A. The error stats that "poly overlap of poly contact < 0.08um in one direction (licon.8a)". And there are about 83 instantiations of this cell in my design and this is the only drc error I am facing in my design? Will it be waived off or how to solve it?
👍 1
t
The open_pdks repository has a corrected version of this cell but I need to figure out how to get it to override the original. This error is not detected by Calibre and so SkyWater does not consider it an error. Does it cause a precheck failure? If so, I'll work on figuring out how to get the fixed GDS to replace the original in the open_pdks install.
m
We have not started with prechecks yet.
t
What I observe from my own installation is that open_pdks installs a correct .mag layout view of the cell, but that cell references the original GDS. So if you read a design from a .mag view you won't see an error, but if you read it from GDS, you will see the error. Since you have not gotten to prechecks yet, then don't worry about it, as I will figure out how to fold the corrected GDS files into the installation shortly.
m
Ok, thank you kindly ping us when you will update GDS
t
@User: I just updated open_pdks on opencircuitdesign.com (version 1.0.236). It now properly substitutes the corrected GDS of the standard cells into the library. I will need to get this change propagated through openlane (which chooses the commit version of open_pdks when installing the PDK).
m
@User Thank you!
Do you have idea about DRC error stating that
Can't overlap those layers
. I have two such error and both are inside the
sky130_fd_sc_hd__probe_p_8
cells but in both cells it pointing to different areas.
t
@User: I don't see any feedback markers in the area you're showing in the screenshot. Did you use "feedback find" to search for these areas? The screenshots are zoomed in too far to see what's going on in the cell.