[westurner]

Electronic waste: https://en.wikipedia.org/wiki/Electronic_waste

From https://news.ycombinator.com/item?id=44269481 :

> From "Turning waste into gold" (2024) https://www.sciencedaily.com/releases/2024/02/240229124612.h... :

>> Researchers have recovered gold from electronic waste. Their highly sustainable new method is based on a protein fibril sponge, which the scientists derive from whey

/? e-waste: https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...

"“Toasterlike” Process Recovers Rare Earths From E-waste: Flash joule heating can recover important magnet metals" (2026) FJH https://spectrum.ieee.org/rare-earth-minerals-recycling-ewas...

Hydrogen plasma and hydrogen cold plasma can recycle plastic with less energy than FJH, FWIU.

I have some notes on a semiconductor fabrication process with just sustainable inputs: Ethyl Lactate, Lignin-Vitrimer, Nitrogen, CO2, Laser-induced Graphene, A-CNT, PCLP Photo-cleavable Lignin Polymer, Hexyl Cellulose

But A-CNT need to be encased in something to prevent health hazard if they burn. Phytic acid from e.g. Bran seed is high in phosphorous which might prevent health risks of CNT.

[alexandrehtrb]

> I have some notes on a semiconductor fabrication process with just sustainable inputs: Ethyl Lactate, Lignin-Vitrimer, Nitrogen, CO2, Laser-induced Graphene, A-CNT, PCLP Photo-cleavable Lignin Polymer, Hexyl Cellulose

Yeah, I was thinking of something like that. If there are fewer chemical components, recycling gets easier.

[westurner]

A biodegradable product out of biodegradable inputs would be great for computing

Before looking into Lignin I was looking at deoxidizing rGO reduced graphene oxide with hydrogen plasma.

I learned that the work functions of graphene and CNT are actually sufficiently different such that the graphene could be a substrate for CNT FET without the charge jumping out of the gate to the board. Salt apparently dissipates electric discharge about as well as silicon.

But a plasma process would probably have a lower yield rate unless there are masks, which are expensive to fab but maybe necessary to compete at production scale.

Monolithic chip fab is slower but the fabrication plant CapEx and OpEx are lower.

LCS SLM with LCoS, CO2 fiber laser / Yb Laser, plain old DUV

Some helpful prompts for a sustainablefactory agent skill:

Identify and redesign to eliminate production health hazards and environmental hazards

Find and compare sustainable alternatives, workarounds, substitutes for

Consider cellulose, graphene CNT and other carbon allotropes, CO2, nitrogen