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Question to everyone with NLNet MoU
by David Lanzendörfer 20 Apr '20

20 Apr '20

Hello everyone A quick question to everyone, who has applied for NLNet funding. Did you do so, by associating with LibreSilicon OR Libre-SoC? This question is just to verify. Cheers -lev

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Liberty Comparison
by Philipp Gühring 15 Apr '20

15 Apr '20

Hi, Does anyone know a tool to compare 2 liberty files (.lib) ? I would like to get a report of the differences and/or similarities, and perhaps some statistics for min/max values, and visualisation of the tables. I would like to get a report from the tool. Best regards, Philipp Gühring

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Reminder - Next Mumble session on Sunday, 23/03/2020, 21.00 HKT
by reminder＠libresilicon.com 15 Apr '20

15 Apr '20

Hello List! Just a small reminder for our next Mumble Sessions on this Sunday, 23/03/2020, at 21.00 Hong Kong Time. Please join us as usual at our Mumble Server murmur.libresilicon.com at Port 64738, the Channel is IC. Thanks for the attention!

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Maskless lithography
by David Lanzendörfer 12 Apr '20

12 Apr '20

Hi everyone So last Sunday, Ferenc and I brainstormed on how to achieve smaller feature sizes with a UV wave length, which limits us to 400nm or so. We discussed splitting a lower feature size layout into multiple masks and then doing overlapping exposure steps. Ferenc pointed out, that we might run into an offset issue. I've been thinking about this for a while and the solution came to me on the toilet just now, and it's actually surprisingly simple. Since we're using a DMD and not physical masks, we can do the multiple exposure steps all at once, without any stepping in between. while(!eow()) { // end of wafer expose_mask(1); expose_mask(2); step_to_next(); } cheers -lev

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Maskless lithography
by David Lanzendörfer 11 Mar '20

11 Mar '20

Hi I'm apparently not the first one with the idea to use a DMD chip and an UV light source for exposure: https://www.researchgate.net/figure/Layout-for-UV-based-DMD-system-If-the-i… There are actually parts available: http://www.ti.com/product/DLP9500UV http://www.ti.com/product/DLP9000XUV For those chips, the UV wave length would be around 360nm The price on Mouser is 8888 USD, so around 9 thousand USD The chip is exactly made for mask less lithography systems as the one I wanna build, it's even mentioned in the data sheet: http://www.ti.com/lit/ds/symlink/dlp9500uv.pdf By optimizing the aperture of the lens system, this means that one could perfectly fine produce feature sizes down to 150 nm or so, maybe even smaller. I wonder, whether we should make a gofundme campaign for buying the required second hand stepper and this chip... Hmm. Also. Since this chip is super expensive, we will need to *really* make sure, that there's no mistake in the PCB, because we only have one attempt. Cheers -lev

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Weekly Mumble
by Éger Ferenc 08 Mar '20

08 Mar '20

Hello Everyone! Is the scheduling of weekly Mumble session still Sunday 2100 HKT? I found no-one there and then. Regards, Ferenc

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Mumble, in an hour
by David Lanzendörfer 16 Feb '20

16 Feb '20

Hi folks Please don't forget, that we've got a Mumble session in less than an hour. Cheers -lev

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Mumble, quick reminder for my fellow nerds: Today is Sunday
by David Lanzendörfer 09 Feb '20

09 Feb '20

Hi everyone I'm idling here around in Mumble. Quick reminder: Today is Sunday And in 10 minutes it's 9pm HKT ;-) -lev

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Portugal, Clean room, HOLY SHIT!!! O_O
by David Lanzendörfer 06 Feb '20

06 Feb '20

Hello folks I've just been pointed to this OpenAccess lab in Braga: https://lims.inl.int/WebForms/Equipment/EquipmentList.aspx That's more advanced than HKUST!!! And it has the same access conditions AS HKUST!! Seems not only my personal life is getting hotter, but also the lab itself! :D -lev

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AMKOR in Porto, Portugal
by David Lanzendörfer 03 Feb '20

03 Feb '20

Hi I just got feedback from AMKOR and it seems that the factory line in Porto does only do packaging and doesn't do front end manufacturing anymore. So I think we really better check for labs like the one we've looked at yesterday[1], which are at least partially equipped to perform the FEOL steps. At least we now know that there's a place where we can package it xD Cheers David [1] https://www.cenimat.fct.unl.pt/lab-facilities/clean-room-lab[1] -------- [1] https://www.cenimat.fct.unl.pt/lab-facilities/clean-room-lab

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