September 2021 - Libresilicon-developers

TSMC
by David Lanzendörfer 26 Sep '21

26 Sep '21

So I wrote today to Kees Joosse from TSMC[1] and asked him whether they would accept an order from us sending them just the GDS2 files generated with the openly available design rules here[2]. I'll tell you IF I ever hear back from him... haha [1] https://www.linkedin.com/in/keesjoosse [2] https://git.libresilicon.com/?p=redmine/qtflow.git;a=blob_plain;f=tech/osu0… -- (\__/) (='.'=) This is Ninja Bunny. (")_(") Copy and paste Bunny into your signature to help him gain world domination

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Slides for investors: LibreSilicon foundry on LiberLand
by David Lanzendörfer 25 Sep '21

25 Sep '21

Hi everyone So I had a very inspiring positive discussion with a representative of the Free Republic of Liberland and they would love to use LibreSilicon, because the idea behind LibreSilicon is 100% in line with their goals. I was wondering whether some of you folks would like to contribute to the business proposal to all the Liberlanders, I'm working on right now. Cheers -lev

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Opensource magnetron sputtering
by David Lanzendörfer 25 Sep '21

25 Sep '21

Hi Someone has made an open source magnetron sputterer and all the STL files are available online, here's a video about the project: https://youtu.be/XHQxghdj2ks Cheers -lev -- (\__/) (='.'=) This is Ninja Bunny. (")_(") Copy and paste Bunny into your signature to help him gain world domination

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Announcement - Mumble session on Sunday 2021-09-26 @ 18:00 UTC
by Hagen SANKOWSKI 24 Sep '21

24 Sep '21

Hello List! This is our weekly announcement for the next Mumble Sessions on Sunday 2021-09-26 @ 18:00 UTC. Please join us as usual at our Mumble Server murmur.libresilicon.com at Port 64738, the Channel is IC. We like to follow-up our topics from mumble sessions before. Regards, Hagen. -- "They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety." Benjamin Franklin (1775)

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Announcement - Mumble session on Sunday 2021-09-19 @ 18:00 UTC
by Hagen SANKOWSKI 18 Sep '21

18 Sep '21

Hello List! This is our weekly announcement for the next Mumble Sessions on Sunday 2021-09-19 @ 18:00 UTC. Please join us as usual at our Mumble Server murmur.libresilicon.com at Port 64738, the Channel is IC. We like to follow-up our topics from mumble sessions before. Regards, Hagen.

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Announcement - Mumble session on Sunday 2021-09-12 @ 18:00 UTC
by Hagen SANKOWSKI 11 Sep '21

11 Sep '21

Hello List! This is our weekly announcement for the next Mumble Sessions on Sunday 2021-09-12 @ 18:00 UTC. Please join us as usual at our Mumble Server murmur.libresilicon.com at Port 64738, the Channel is IC. We like to follow-up our topics from mumble sessions before. Regards, Hagen.

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Successful Tapeout!!!
by Philipp Gühring 05 Sep '21

05 Sep '21

Hi everyone, Hooray, we made a tapeout with Libresilicon technology! The story starts a long time ago (around 2019) with the idea of growing standard cells from a single Inverter to a whole standard cell library like popcorn, but in a reproducible way. We developed a toolchain which starts from the Design-Rules (DRC) and netlists, and automatically layout, DRC-fix, simulate, characterize and document standard cells for each of the given netlists. That toolchain is currently able to layout about 80% of the cells DRC clean: https://github.com/thesourcerer8/StdCellLib/ You can see a resulting standard cell library here: https://pdk.libresilicon.com/dist/StdCellLib_20210618/Catalog/buildreport.h… Now that the toolchain has matured enough to be usable, I decided to try it on the Skywater 130nm process node through a Google Shuttle: https://github.com/thesourcerer8/caravel_stdcelllib_stdcells_project It automatically takes all the DRC-cleanly generated standard cells from StdCellLib, and puts each of the cells seperately on a test-wafer, and connects each cell up to the IO and to the internal logic analyzer (since there aren't enough IOs), then it uses OpenLane/OpenROAD to automatically layout the whole core. The whole toolchain from DRC+Netlists to test-wafer GDS runs in about 2-3 hours at the moment. I successfully submitted the design to EFabless/Google/Skywater, and expect packaged silicon back by the end of the year. One interesting tool I developed is a generic automatic DRC fixing engine, which is used to post-process the layouted cells for more complex rules which wouldnt make sense to implement in the layout generator engine. Open Tasks where help is needed: * I started working on automated Verification firmware that tests all possible input combinations of all the cells, but this isn't completed yet. * We should try to improve lclayout to be capable to characterize sequential cells * I implemented various workarounds (fixup's) that fix up the layout of the standard cells to be compatible with the existing Skywater standard cells. We should think about which of those should be put into lclayout, to cleanup the toolchain there. * As a next step we should take some medium complexity digital logic and completely synthesize/place/router it as a core with our own cells. Does anyone want to lead that project? Best regards, Philipp Gühring

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Skywater 130
by Philipp Gühring 05 Sep '21

05 Sep '21

Hi, For creating your own digital Sky130 project, you need to clone the caravel_user_project: https://github.com/efabless/caravel_user_project/ For creating your own analog/mixed Sky130 project (which gives you some analog IO Pads), you need to clone the caravan project: https://github.com/efabless/caravel_user_project_analog I collected some documentation videos about Sky130 and various topics arount it: https://docs.google.com/spreadsheets/d/1fM301JZe_2h0-mTfyahFGRWqt3fDhnnSe2X… The next tapeouts are most likely around October and December. Best regards, Philipp

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Announcement - Mumble session on Sunday 2021-09-05 @ 18:00 UTC
by Hagen SANKOWSKI 04 Sep '21

04 Sep '21

Hello List! This is our weekly announcement for the next Mumble Sessions on Sunday 2021-09-05 @ 18:00 UTC. Please join us as usual at our Mumble Server murmur.libresilicon.com at Port 64738, the Channel is IC. We like to follow-up our topics from mumble sessions before. Regards, Hagen.

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Announcement - Mumble session on Sunday 2021-08-29 @ 18:00 UTC
by Hagen SANKOWSKI 01 Sep '21

01 Sep '21

Hello List! This is our weekly announcement for the next Mumble Sessions on Sunday 2021-08-29 @ 18:00 UTC. Please join us as usual at our Mumble Server murmur.libresilicon.com at Port 64738, the Channel is IC. We like to follow-up our topics from mumble sessions before. Regards, Hagen.

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