[sdiy] Can google's free* 180nm OSHW foundry be used for synth parts?

[cheater cheater]

Google are running a program where if you submit open source chip
designs they'll produce them either cheaply or for free on a 180 nm
process.

"We sponsored six shuttle runs over the course of two years, allowing
the open source community to submit more than 350 unique designs of
which around 240 were manufactured at no-cost."

Is this a process that could be used for analog synth parts? We could
use new OTA chips, and I think I wouldn't mind a chip with 64
monolithic OTAs on it, or chips with full voices, etc. With this
feature size, leaps and bounds beyond the last time synth chips were
being miniaturized, we could go wild with designs.

Apparently they already have solutions for on-chip passives, single
transistors, and relatively "high" voltages (10V), so the next
question is how they would handle something like an OTA, VCA, op amp,
etc, since most users seem to be focusing on digital chips.

"The GF 180nm technology platform offers open source silicon designers
new capabilities for high volume production, affordability, and more
voltage options. This PDK includes the following standard cells:
- Digital standard cells libraries (7-track and 9-track)
- Low (3.3V), Medium (5V, 6V) and High (10V) voltage devices
- SRAM macros (64x8, 128x8, 256x8, 512x8)
- I/O and primitives (Resistors, Capacitors, Transistors, eFuses)
cells libraries"


https://www.phoronix.com/news/Google-GloFo-GF180MCU

https://opensource.googleblog.com/2022/08/GlobalFoundries-joins-Googles-open-source-silicon-initiative.html


If we can figure out how to take advantage of that, synth chips could
become very interesting.