I've got a metal density fail on this job. <https:...
# tapeout-jobm
Matt Venn
08/02/2022, 1:13 PMI've got a metal density fail on this job. https://platform.efabless.com/projects/1229
Anyway to find out what layer the problem is on? Or by how much the density is?
Matt Venn
08/02/2022, 1:18 PMYes
k
Krzysztof Herman
08/02/2022, 1:18 PM@Matt Venn Hi, the error You have has something in common with KLAYOUT METAL MINIMUM CLEAR AREA DENSITY CHECK FAILED
Krzysztof Herman
08/02/2022, 1:19 PMwe were have had it as well since MPW3
Krzysztof Herman
08/02/2022, 1:19 PMthe solution we have found was pretty manual
Krzysztof Herman
08/02/2022, 1:19 PM1. Open klayout
2. Open the gds for the sky hd stdcell library
3. Open the ef decap 12
4. Open the gds of your layout and open the layout of sky's decap
5. Delete content of the sky's decap
6. Copy the content of ef's decap in place
kherman
👍 1
m
Matt Venn
08/02/2022, 1:21 PMThanks ill check. I saw this fix but i thought it was related to poly
Matt Venn
08/02/2022, 1:22 PMI have a tighter than usual pdn so i was thinking it might be that
k
Krzysztof Herman
08/02/2022, 1:23 PMMy observation is that there is a critical number of std cells where the problem starts to show up
m
Matt Venn
08/02/2022, 1:24 PMI do have a lot of cells
Matt Venn
08/02/2022, 1:24 PMProbably the highest utilisation so far for me
k
Krzysztof Herman
08/02/2022, 1:24 PMhow many ?
m
Matt Venn
08/02/2022, 1:24 PMHave to check
k
Krzysztof Herman
08/02/2022, 1:30 PMI have one question. Have You met people interested in open source tools and PDK's for MEMS development ?
m
Matt Venn
08/02/2022, 1:42 PMYes, a few
k
Krzysztof Herman
08/02/2022, 1:45 PMThere are a few tools for mechanical part simulation what could be a pretty good starting point, the problem is the PDK and the foundry, however seems not to be so complicated since in fact the bulk process is a customized version of a CMOS process
m
Matt Venn
08/02/2022, 2:51 PM@Krzysztof Herman did you see this suggestion for the metal density? https://open-source-silicon.slack.com/archives/C032VUYLL64/p1655518149418049?thread_ts=1655504658.000869&cid=C032VUYLL64
Matt Venn
08/02/2022, 2:52 PMI'm going to try that first, looks sipmler
k
Krzysztof Herman
08/02/2022, 5:23 PMI have not seen that solution, will take a llok
m
Matt Venn
08/03/2022, 1:54 PMby the way @Krzysztof Herman did you know we have a faq?
Matt Venn
08/03/2022, 1:54 PMMatt Venn
08/03/2022, 1:54 PMI'm adding this to it
k
Krzysztof Herman
08/03/2022, 1:55 PM@Matt Venn haven't known, thanks for the info
m
Matt Venn
08/03/2022, 1:56 PMfeel free to suggest additions
k
Krzysztof Herman
08/03/2022, 1:56 PM👍
3 Views