Glass memory?

[steven at malikoff.com]

Paul and others said
>> What if you can't make ICs any more? Or rather, what level of IC
>> fabrication would it be possible to construct from scratch?

> For semiconductors, you'd start with machinery to make ultra-pure materials (silicon, I'd assume).  A Czochralski crystal growing machine to make
> the cylinders of pure mono-crystal silicon from which wafers are sliced.  Polishing machinery.  Wafer coating machines.  Wafer steppers.  Etching,
> metal coating, diffusion, etc......... most of which also require very pure and often exotic ingredients.  (I remember being amazed to read that
> chlorine trifluoride is used as a cleaner in the semiconductor industry.  Look up the properties of that compound, it will blow your mind.)

Which brings to mind the amazing work of Sam Zeloof:
https://www.youtube.com/results?search_query=zeloof+z1+chip