[throwawaybbq1]

I'm a hobbyist in this area, and think the field is somewhat early in its development. MCUs and cyber-physical systems was like this until the Arduino happened. Arduino may not have been the first to do exactly that but it was just good enough to cause an (re?)explosion in electronics as a hobby. During its hayday, I would say Arduino was a core element of the Maker movement.

So what needs to happen to make this a reality for semi-con? First off, we need cheap, cheap fabrication. I actually looked at public funding in Canada and how that was going to the big name Universities who had their own in-house fab labs (at older process nodes). The costs of someone not in the inside was nuts. The actual cost should be in the 100s of dollars to fabricate a design (considering the marginal costs).

There are people that do this at home but it doesn't work either due to chemicals being pretty dangerous and the need for a bunch of equipment. I bet the amount of money the EU spent on its first metaverse townhall (or whatever it was called .. the thing very few people attended) or a tiny fraction Canada wastes on silly things promoting youth culture or whatever, they could fund a lab that is actually open to the public, with the express mission of promoting hobbyists and education. This will NEVER happen because (a) it needs a professor who is on the inside with a kid-like passion in this tech and a commitment to bringing it to the masses (I see some profs like this at schools like MIT but it is so rare at large, competitive schools like the big ones in Canada), and (b) it does not have an instant payoff for the govt. They don't want dabblers and vague educational outcomes. They want workers with degrees.

I am convinced before I am dead, advances in robotics and fabrication will simply the process (or use home equipment such as future laser printers for printing stencils). I'd love to spend my retirement fabricating my own CPUs :D

Edit:

Let me add: I don't mean the cutting edge process node. I mean the kind of process node that was used to make the very first chips (but less toxic, repeatable, cheaper equipment). If it is possible for synthetic biology, it must be doable for semicon :D

[lizknope]

I'm a 25 year professional in the industry so I've never really thought of the hobbyist side. I use software from commercial Cadence and Synopsys that has a list price of over $1 million for a single physical design tool license and we use about 200 of those licenses simultaneously to tape out a chip. Then we spend about $30 million in mask costs. If we make a mistake it is another $20-30 million for new masks and another 4 months in the fab for a new chip.

Google / SkyWater / eFabless have this program for 90/130nm chips. That is really old technology from the 2002-2006 time range but it is still useful for a lot of types of chips.

https://opensource.googleblog.com/2022/07/SkyWater-and-Googl...

https://www.skywatertechnology.com/technology-and-design-ena...

https://efabless.com/open_shuttle_program

I am curious what kind of hobbyist chips you want to make that can't be done in an FPGA? You can't do custom analog in an FPGA but these days you can find FPGAs with multiple PCIE / USB / HDMI serdes links, DAC, ADC, etc.

[blihp]

The problem with FPGA's isn't the hardware... it's quite complete and capable. It's the software stack you're forced to access most of them via that makes them a non-starter for many/most hobbyists. (cost is a major issue, but hardly the only one) My guess is that as low cost producers who have embraced the existing open source FPGA software being developed start producing higher end parts (more recent process nodes, large LUT count etc), that's when you'll really start to see them take off in the hobbyist world.

I think the OP isn't even talking about 2006-level capability but rather something akin to 3D printing for semis that approached even early (i.e. somewhere in the 1960's-1980's range) level fab capability for hobbyists. Obviously it doesn't exist currently, but that's the dream for some.

[UncleOxidant]

> I use software from commercial Cadence and Synopsys that has a list price of over $1 million for a single physical design tool license and we use about 200 of those licenses simultaneously to tape out a chip. Then we spend about $30 million in mask costs. If we make a mistake it is another $20-30 million for new masks and another 4 months in the fab for a new chip.

I've thought for a long time now that this is an area ripe for disruption. But it's very difficult to disrupt - it hasn't been yet. EDA software is probably the easier part to disrupt. Some open source EDA tools are out there, but not so much on the physical design side.

[ilyt]

> MCUs and cyber-physical systems was like this until the Arduino happened

I'd say it technically happened when cheap flash based microcontrollers become available.

Before you had to have *at the very least* EPROM programmer and eraser (or CRT TV I guess) to even put your code onto microcontroller. Flash based microcontrollers meant all you needed is parallel port and some wires to start programming microcontrollers, dropping the barrier to entry by orders of magnitude if you already had PC to program.

Then we had first wave with Basic STAMP and similar making it even easier.

Then it was Arduino that exploded it and there were other factors on that too.

>So what needs to happen to make this a reality for semi-con? First off, we need cheap, cheap fabrication. I actually looked at public funding in Canada and how that was going to the big name Universities who had their own in-house fab labs (at older process nodes). The costs of someone not in the inside was nuts. The actual cost should be in the 100s of dollars to fabricate a design (considering the marginal costs).

Like that. Before making PCB was either doing it at home that took a bunch of time and not everyone wanted to play with chemicals, or expensive to prototype PCB.

Now we have extremely cheap low volume PCBs and even well priced low volume manufacturing options. Same thing with 3D printing, went from massively expensive to affordable.

The problem really is that it's still a bit profitable to do so for companies doing it, while doing same for chip-making would be oh so much harder unless someone put some SERIOUS R&D into making "industrial chip printer" where each wafer could have different set of chips (packaging I guess could be handled by requiring each submitted chip to have connectors in same place). So no mask but some kind of DLP or similar projector to do lithography (dunno if that even possible for anything in hundreds of nm range, just guessing)

[scrlk]

https://developers.google.com/silicon might be of interest to you.

[sweetjuly]

I don't believe Google is sponsoring any more free shuttles. Your best bet nowadays is ponying up $10k to get a tiny chip on sky130 (so small you really can't hold even mildly complex in-order RISC-V cores). Sky130 is also generally so old that you can probably get better performance (let alone area) on a modern FPGA for a fraction of the price. Efabless's sky130 MPW is nice for semiconductor research insofar as it makes it more realistic to actually fab designs but it's not particularly useful for hobbyists beyond just the novelty of holding a chip you designed in your hands.

[est31]

There is the libresilicon project: https://libresilicon.com/

But I don't know how usable they are.