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<Noxz>
any known sources for silicon rods? (likely poly-crystalin-silicon)
<Noxz>
also, bed time, will check back on this tomorrow
<Noxz>
also, may have found it easy enough..
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<jesseg>
I wonder if silicon cell fragments from ebay could be used for making IC's
<jimn>
jesseg: nope
<jesseg>
jimn, just diodes ? :P
<jimn>
jesseg: Nope.
<jesseg>
wait... They *are* diodes..
<jesseg>
I mean I know just enough to know that I just don't know enough. But I sure thought that pv solar cells modeled pretty like a large surface area diode
<SpeedEvil>
you can in principle remove the active junction and reuse them
<SpeedEvil>
they are very bad quality compared to 'proper' IC silicon though
<jesseg>
ok that makes sense
<Noxz>
btw, my idea w/ the rod is more 3d parts than from wafer
<SpeedEvil>
What do you mean by '3d parts'
<SpeedEvil>
All semiconducor manufacturing today is done from the edge in, there is no way to form dense features inside
<Noxz>
so, what I want is a vertical helix spring
<Noxz>
not a radial one
<Noxz>
I also want to look into if you can wet etch polycrystaline ("random oreintation").. forget if I looked into it or not
<nmz787>
Noxz: can you link a pic of a representative spring?
<Noxz>
standard torsion spring..
<Noxz>
well, sort of, likely the 'legs' would go internally vs externally
<Noxz>
for my use case, and also the fact that if we start with a rod of the nominal diameter, attaching legs to it would be more cumbersome
<Noxz>
so, really, a silicon tube may be a better starting point..
<Noxz>
there is also the idea of micro-milling instead of etching
<nmz787>
Noxz: like the torsion bars on my old Chevy S10 Blazer?
<nmz787>
Noxz: sorry, legs for? is this MEMS scale or what? last thing I saw you talking about before was your espresso maker
<nmz787>
Noxz: your mention of a rod and 3d printing makes me think of trying to use a silicon rod like a glue stick, somehow melting the end as you want to deposit a track of silicon on some plate/substrate
<Noxz>
"legs" are the ends of the torsion spring that you connect to
<Noxz>
how you transmit the torque
<Noxz>
and glue stick is an alright analogy, except good luck getting Si to melt in that sense.. think of it more like a rod/tube that you chuck up in a lathe and turn threads (untill it pierces into a supporting backing rod)
<Noxz>
something starting out at 5mm diameter (or even 2mm) can be turned on a lathe fairly easy
<Noxz>
I would think it would have to be polycrystaline at that point though