************************ several projects are running into metal density issues during tapeout related to LI. one common cause is using the standard decap_12 cell when hardening your macro. we recommend using a modified version with less LI. to use it, add the following to your

config.tcl

set ::env(DECAP_CELL) "sky130_ef_sc_hd__decap_12 sky130_fd_sc_hd__decap_3 sky130_fd_sc_hd__decap_4 sky130_fd_sc_hd__decap_6 sky130_fd_sc_hd__decap_8"

then reharden each of your macros and your user_project_wrapper using OpenLane. you will then need to rerun precheck followed by tapeout on the platform. ***********************

@User with DECAP_CELL changes openlane Magic DRC check follows fails with

wb_host: 21093 fatal errors
Total of 21093 errors (check feedback entries).
exttospice finished.
Using technology "sky130A", version 1.0.234-0-g14db32a
[ERROR]: There are illegal overlaps (e.g., routes over obstructions) in your design.
[ERROR]: See /project/openlane/wb_host/runs/wb_host/logs/magic/37-magic_ext2spice.feedback.txt for more.