Hello Everyone,
Just another two considerations: Our target audience with this kit is the unit-radius citizen without significant financial resources (hence the 300Eur target price), so the following needs to be addressed:
- How to deposit the metalization without possessing a "real" sputter? Maybe a chemical process that leaves a solid metal layer?
- How to make the chip terminals accessible without possessing a "real" bonder (the dumbest functional second-hand unit is min. approx. 4000USD on ebay)? Mind the parasitic capacitance here...
Regards,
Ferenc
On 22/03/2021 16:37, David Lanzendörfer wrote:
Hi No I didn't know this project. Seems to be pretty much the final stage of what I was thinking about... Can you get us in touch? Having one of those machines would make it unnecessary to have access to a clean room... It would be awesome!
Cheers -lev
On Monday, March 22, 2021 10:31:44 AM WET Pavel Nikulin wrote:
Great to hear you guys having so much progress.
By any chance, have anybody heard of Domicro BV? A Netherland based microfab shop https://bits-chips.nl/artikel/small-series-of-chips-profitable-by-flexible-%... concept-minimal-fab/ On Mon, Mar 22, 2021 at 5:49 AM Ferenc Éger eegerferenc@gmail.com wrote:
Hello Everyone,
Summary of the Mumble session:
Participants: eegerferenc, hsank, leviathan, tatzelbrumm
Agenda:
- LS50U/MLL: It is proposed to make a maskless exposure unit based on
JBD's uLED panel targeted at 50-100um MFS, and make it available bundled into a "DIY Microchip Fabrication Kit" containing everything needed for
a basic process. Details discussed so far: * Substrate: custom, 1-2cm rectangular "wafers" in order to make
alignment easier and to fit into a small tube furnace. Similar, but polycrystalline offerings exist for solar panels. Finding and quoting a supplier is in progress.
* Exposure: JBD uLED panel + simple projection/reduction optics +3D-printed framework for alignment, into which the chips can be slided in.
* Furnace: cheap second-hand tube furnace, or a tube furnace heaterwith retrofitted quartz tube and control electronics (backup plan). Metal-lined, graphite-lined or gas-heated types are to be avoided due to contamination issues.
* Chemicals (HF, B, P, As, acidic cleaning agents, ...): Ordered inbulk and repackaged for distribution to overcome that chemical reagent suppliers don't deal with individuals.
* Funding: Initially, crowdfund with unit price based on theexpectation of at most 2 customers (semiconductor-related crowdfunding tends to fail), then lower the UP if more customers come. Also, plan B shall be formulated.
* Legal background: form a limited-liability company to handle thestuff.
Discussion is expected to continue until next Sunday, when things are expected to be written down. Comments on mailing list or participation in the Mumble session are welcome.
Regards,
Ferenc
On 20/03/2021 09:29, Hagen SANKOWSKI wrote:
Hello List!
This is our weekly announcement for the next Mumble Sessions on Sunday
2021-03-21 @ 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 meeting minutes from mumble sessions before.
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