google/skywater-pdk

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Open source process design kit for usage with SkyWater Technology Foundry's 130nm node.

Stars: 3.7k
Forks: 487
Open beginner issues: 0
Indexed issues: 172

Dominant language: Python
License: Apache-2.0
Last GitHub push: May 29, 2023
Latest indexed: Sep 16, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted
PR merge metrics: No merged PRs in 30d

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172 open issues indexed

Publish OpenAccess files to improve Cadence Virtuoso support Open

lib-sky130_fd_io lib-sky130_fd_sc_hd lib-sky130_fd_sc_hdll lib-sky130_fd_sc_hs lib-sky130_fd_sc_lp lib-sky130_fd_sc_ls lib-sky130_fd_sc_ms lib-sky130_fd_sp_flash lib-sky130_fd_sp_sram tools-Cadence-Virtuoso type-todo

google/skywater-pdk#1 · 19 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Publish scripts required to generated files to work with Mentor Calibre Open

scripts-python tools-Mentor-Calibre type-todo

google/skywater-pdk#2 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Publish the SKY130 SRAM Build Space Open

in-progress lib-sky130_fd_sp_sram tools-OpenRAM type-todo

google/skywater-pdk#3 · 6 comments · 0 reactions · 2 assignees · Indexed Sep 16, 2026
Publish the SKY130 Flash Build Space Open

lib-sky130_fd_sp_flash type-todo

google/skywater-pdk#4 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Publish the SKY130 foundry provided IO and Periphery cells Open

lib-sky130_fd_io type-todo

google/skywater-pdk#5 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Publish scripts which generate spice files from raw data CSV files Open

scripts-python type-todo

google/skywater-pdk#7 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Publish the SKY130 Oklahoma State University provided standard cell library Open

in-progress lib-sky130_osu_sc type-todo

google/skywater-pdk#10 · 4 comments · 0 reactions · 3 assignees · Indexed Sep 16, 2026
Publish documentation on using the PDK for digital design Open

documentation tools-Cadence-Innovus tools-OpenROAD type-todo

google/skywater-pdk#11 · 3 comments · 3 reactions · 1 assignee · Indexed Sep 16, 2026
Publish documentation on using the SkyWater PDK for analog design Open

documentation tools-Cadence-Virtuoso type-todo

google/skywater-pdk#12 · 11 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Publish documentation on using the SkyWater PDK with analog generators Open

documentation tools-BAG tools-FASoC type-todo

google/skywater-pdk#13 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Publish example documentation for using the PDK to create a RISC-V SoC Open

documentation lib-sky130_fd_io lib-sky130_fd_sc_hd tools-OpenROAD type-todo

google/skywater-pdk#14 · 3 comments · 6 reactions · 1 assignee · Indexed Sep 16, 2026
Publish documentation on using Magic with PDK to do DRC checking. Open

documentation tools-Magic type-todo

google/skywater-pdk#15 · 0 comments · 0 reactions · 2 assignees · Indexed Sep 16, 2026
Investigate if the Cu rules should be removed from the documentation Open

documentation type-question type-todo

google/skywater-pdk#28 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Table constructs in the generated liberty files cause warnings Open

files-timing-json files-timing-liberty tools-Synopsys-PrimeTime type-bug

google/skywater-pdk#40 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Migrate from Probot Autolabeler to GitHub Actions based labeler Open

help-wanted infrastructure type-enhancement

google/skywater-pdk#41 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make sure that the Python API tests are being run as part of the Travis CI system Open

help-wanted infrastructure type-todo

google/skywater-pdk#44 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Missing techfiles Open

tools-Synopsys-DesignCompiler type-question type-todo

google/skywater-pdk#47 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Publish script which combines the LEF files from the cells into one big file Open

files-layout-lef files-layout-lef-magic help-wanted lib-sky130_fd_sc_hd lib-sky130_fd_sc_hdll lib-sky130_fd_sc_hs lib-sky130_fd_sc_hvl lib-sky130_fd_sc_lp lib-sky130_fd_sc_ls lib-sky130_fd_sc_ms scripts-python type-enhancement type-todo

google/skywater-pdk#51 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Publish script which combines the GDS files from the cells into one big file Open

files-layout-gds help-wanted lib-sky130_fd_sc_hd lib-sky130_fd_sc_hdll lib-sky130_fd_sc_hs lib-sky130_fd_sc_hvl lib-sky130_fd_sc_lp lib-sky130_fd_sc_ls lib-sky130_fd_sc_ms lib-sky130_osu_sc scripts-python tools-Magic type-enhancement type-todo

google/skywater-pdk#52 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add documentation on how to use the SkyWater PDK on the efabless platform Open

documentation

google/skywater-pdk#53 · 5 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Publish script which combines the CDL files from the cells (and models) into one big file Open

files-netlist-cdl files-netlist-tsv help-wanted lib-sky130_fd_sc_hd lib-sky130_fd_sc_hdll lib-sky130_fd_sc_hs lib-sky130_fd_sc_hvl lib-sky130_fd_sc_lp lib-sky130_fd_sc_ls lib-sky130_fd_sc_ms lib-sky130_osu_sc scripts-python type-enhancement

google/skywater-pdk#54 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Create a script which generates a logic table for a given cell in the documentation Open

documentation files-model-functional-verilog files-testbench-verilog help-wanted lib-sky130_fd_sc_hd lib-sky130_fd_sc_hdll lib-sky130_fd_sc_hs lib-sky130_fd_sc_hvl lib-sky130_fd_sc_lp lib-sky130_fd_sc_ls lib-sky130_fd_sc_ms lib-sky130_osu_sc scripts-documentation type-enhancement

google/skywater-pdk#55 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Incorrect attribute type for `violation_delay_degrade_pct` in generated liberty files Open

files-timing-liberty in-progress lib-sky130_fd_sc_hd lib-sky130_fd_sc_hdll lib-sky130_fd_sc_hs lib-sky130_fd_sc_hvl lib-sky130_fd_sc_lp lib-sky130_fd_sc_ls lib-sky130_fd_sc_ms tools-Synopsys-PrimeTime type-bug

google/skywater-pdk#56 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Differential level shifter cells is invalid for missing `contention_condition` attribute in generated liberty timing files Open

files-timing-liberty lib-sky130_fd_sc_hd tools-Synopsys-PrimeTime type-enhancement

google/skywater-pdk#58 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Publish script which generates verilog files Open

files-model-behavioral-verilog files-model-functional-verilog files-model-verilog files-symbol-verilog files-testbench-verilog in-progress lib-sky130_fd_sc_hd lib-sky130_fd_sc_hdll lib-sky130_fd_sc_hs lib-sky130_fd_sc_hvl lib-sky130_fd_sc_lp lib-sky130_fd_sc_ls lib-sky130_fd_sc_ms scripts-python type-enhancement type-todo

google/skywater-pdk#63 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Cloning creates ver1, ver2, latest resulting on make timing creating tons of redundant data Open

documentation type-enhancement

google/skywater-pdk#65 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Validating GDS files Open

documentation files-layout-gds tools-Magic tools-Mentor-Calibre type-question

google/skywater-pdk#66 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make sure that scan flops have the correct signal type for all pins in liberty files Open

files-timing-liberty help-wanted lib-sky130_fd_sc_hd lib-sky130_fd_sc_hdll lib-sky130_fd_sc_hs lib-sky130_fd_sc_hvl lib-sky130_fd_sc_lp lib-sky130_fd_sc_ls lib-sky130_fd_sc_ms lib-sky130_osu_sc

google/skywater-pdk#80 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Check the verilog for good style and run automated style / lint / formatting checks on it Open

files-model-behavioral-verilog files-model-functional-verilog files-model-verilog files-symbol-verilog files-testbench-verilog help-wanted scripts-python-verilog

google/skywater-pdk#85 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Actually run the test bench, record values into output VCD file and render them with wavedrom in documentation Open

documentation files-testbench-verilog help-wanted lib-sky130_fd_sc_hd lib-sky130_fd_sc_hdll lib-sky130_fd_sc_hs lib-sky130_fd_sc_hvl lib-sky130_fd_sc_lp lib-sky130_fd_sc_ls lib-sky130_fd_sc_ms scripts-documentation

google/skywater-pdk#87 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
cell_footprint value in liberty files doesn't match name in verilog or GDS. Open

files-timing-liberty lib-sky130_fd_sc_hd lib-sky130_fd_sc_hdll lib-sky130_fd_sc_hs lib-sky130_fd_sc_hvl lib-sky130_fd_sc_lp lib-sky130_fd_sc_ls lib-sky130_fd_sc_ms scripts-python-liberty

google/skywater-pdk#90 · 22 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Publish GDS layer map Open

documentation help-wanted

google/skywater-pdk#91 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Add support for removing the bias pins in output timing files Open

files-timing-json files-timing-liberty lib-sky130_fd_sc_hd lib-sky130_fd_sc_hdll lib-sky130_fd_sc_hs lib-sky130_fd_sc_hvl lib-sky130_fd_sc_lp lib-sky130_fd_sc_ls lib-sky130_fd_sc_ms lib-sky130_osu_sc scripts-python-liberty tools-Cadence-Innovus

google/skywater-pdk#98 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Rework the .lib generation in the Makefile Open

files-timing-json files-timing-liberty help-wanted infrastructure scripts-python-liberty

google/skywater-pdk#99 · 14 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
make clean should remove the generated .lib files Open

files-timing-json files-timing-liberty help-wanted infrastructure

google/skywater-pdk#100 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Missing subcells "../u_vpwr_vgnd/sky130_fd_sc_hs__u_vpwr_vgnd.v" in inv module Open

files-model-verilog lib-sky130_fd_sc_hs type-bug

google/skywater-pdk#107 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Cleanup the "overwriting comp_attribute" output when generating liberty files Open

files-timing-json files-timing-liberty help-wanted scripts-python-liberty

google/skywater-pdk#109 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Issue with VPB/VNB rails layers can't be selected in virtuoso Open

files-layout-gds lib-sky130_fd_sc_hs tools-Cadence-Virtuoso

google/skywater-pdk#114 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Rework the tie cells in the PDK Open

files-layout-gds files-layout-lef lib-sky130_fd_sc_hd lib-sky130_fd_sc_hdll lib-sky130_fd_sc_hs lib-sky130_fd_sc_hvl lib-sky130_fd_sc_lp lib-sky130_fd_sc_ls lib-sky130_fd_sc_ms

google/skywater-pdk#122 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make sure the PDK can be used without conda if you supply a valid environment Open

files-build infrastructure

google/skywater-pdk#126 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
What is the recommended amount of disk space? Open

documentation

google/skywater-pdk#128 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Set up slack channel invite automation Open

documentation infrastructure

google/skywater-pdk#138 · 10 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
Missing wire_load models in sky130_fd_sc_hd pdk. Open

lib-sky130_fd_sc_hd type-enhancement

google/skywater-pdk#140 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Split docs/rules/layers/table-c4b-layer-description.csv into three tables Open

documentation

google/skywater-pdk#144 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Cleanup references to older flows introduced in pull request #127. Open

documentation

google/skywater-pdk#146 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Cleanup the symbols to have new names Open

documentation files-symbol-svg

google/skywater-pdk#158 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Incorrect cell names in device documentation Open

documentation

google/skywater-pdk#163 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 16, 2026
ngspice does not apply tc1, tc2 to resistors with equation for r Open

files-model-spice lib-sky130_fd_pr type-bug

google/skywater-pdk#169 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
sky130_fd_pr__res_generic_po is commented out in the model file Open

lib-sky130_fd_pr type-question

google/skywater-pdk#170 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Missing device models Open

files-build lib-sky130_fd_pr type-bug

google/skywater-pdk#173 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026

google/skywater-pdk

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