[Libre-silicon-devel] Reminder - Next Mumble session on Sunday, 12/01/2020, 21.00 HKT

Hagen SANKOWSKI hsank at posteo.de
Sun Jan 12 17:44:27 CET 2020

Hello List.

Today, while talking about different possibilities to get back into a
clean room and to continue with our work there, we had once again an
other technical topic in our weekly Mumble session regarding the feature
size on the steppers [0],[1].

All other machines are quite feasible in every clean room, but the
resolution of the stepper determinate the size feature size of our
technology node. Or, with smaller stepper resolutions we can manufacture
smaller structures with Photolithography [2],[3] on silicon. Short, this
machines limiting our possibilities, and, of course, they need masks [4]
which are quite expensive.

Already a couple of weeks ago came up the idea of using quite common
display techniques instead of classical masks, which would allow to
manufacture / photolithography mask-less but faster than usual Laser
plotters are. Today Ference proposed to use the also quite common DPL
technique [6],[7] which is used in Off-the-Shelf Projectors.

So we are now thinking about designing / building a Stepper from
scratch, or to replace the mask-holding parts / optics by something like
Laser + Diffusor + DLP.

Of course, this machine building stuff should be also open source,
public and community-driven as well as our LibreSilicon process. In the
beginning there is no need for keeping this machine in a clean room
under controlled conditions. Just later, when it comes to production a
machines has to get clean.

So are there physicist out there which like to deal with this topic of
constructing / hacking hacking such equipment?

Please, if somebody of you on the list, or someone in your social
surroundings, is interesting in this topic, let us know it. We are happy
to seeing this kind of hacktivism also rising :-)

Best Regards,

[0] https://en.wikipedia.org/wiki/Stepper
[1] https://de.wikipedia.org/wiki/Stepper_(Halbleitertechnik)
[2] https://en.wikipedia.org/wiki/Photolithography
[3] https://de.wikipedia.org/wiki/Fotolithografie_(Halbleitertechnik)
[4] https://en.wikipedia.org/wiki/Photomask
[5] https://de.wikipedia.org/wiki/Fotomaske
[6[ https://en.wikipedia.org/wiki/Digital_Light_Processing
[7] https://de.wikipedia.org/wiki/Digital_Light_Processing

support LibreSilicon to get back into the Clean Room

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