<azonenberg>
12" ish bell jar and 2-stage rotary vane vacuum pump
<azonenberg>
Right now it has one feedthrough for a DB9 port, which isnt much good for high power stuff, but I intend to drill a second hole in the baseplate and run a high voltage feedthrough soon
<azonenberg>
Once i can run two lines at a couple kV into it, time to start sputtering :)
<azonenberg>
we've already hit pressures at the sub-100mtorr range which should be adequate
<azonenberg>
So the only other thing to do is work out how to do an argon purge
<soul-d>
meaning  you need a vacuum then  fill chamber with argon only ?
<azonenberg>
soul-d: yes
<azonenberg>
to sputter properly i will need around 100mtorr of argon
<azonenberg>
or, reactively, a mixture
<azonenberg>
say 70mtorr of argon + 30mtorr of nitrogen to sputter a nitride
<azonenberg>
(numbers are just a guess, the proper partial pressures i'd have to look up)
<soul-d>
so you will will want  a setup that hold and mixes those gases then put the jarbell under pressure with it or mix it in the jarbell ?
<azonenberg>
I'd have two needle valves feeding in
<azonenberg>
So start out by pumping the chamber down as low as it goes
<azonenberg>
then open the valves and gently start feeding gas in at the proper rates
<azonenberg>
as we add inert gas and remove gas from the chamber the amount of air will quickly go to near zero
<azonenberg>
then we can start sputtering
<soul-d>
you make it sound easy
<azonenberg>
soul-d: lol
<azonenberg>
conceptually, it is easy :p
<soul-d>
as soon as buget allows i want to restart chemistry a bit,  been a while  but also need a nice chem table so  accidents can be maintained  shield ,spills etc  also  fume hood  is a must
<bart416>
a propper chemical lab is really expensive
<bart416>
a good lab table alone can cost a small fortune
<azonenberg>
bart416: i know
<azonenberg>
i'm going cheap since i know what i'm working with
<azonenberg>
my hood will be a 2 foot cube of PVC with an acrylic sash
<bart416>
I was talking about soul-d :P
<bart416>
you have sort of a clue what you're doing
<bart416>
a chemically inert lab table is so important if you are going to be doing a lot of experiments :P
<azonenberg>
bart416: yeah
<azonenberg>
I actually know what i'm doing
<azonenberg>
the PVC is fine, the acrylic will be damaged by acetone splashes
<azonenberg>
but i hope to keep them to a minimum
<azonenberg>
It'll hold in any accidental release, just need to be replaced after
<bart416>
remember that CR-39 we were talking about?
<bart416>
I managed to get a hold on a rod of it
<azonenberg>
Which was that again? refresh my memory
<soul-d>
oh not realy bart416
<soul-d>
there are some recipy's for painting tables
<bart416>
the transparent material that was resistant to solvents
<azonenberg>
oh
<azonenberg>
yeah
<bart416>
tried it
<bart416>
it survived 24 hours in chloroform...
<bart416>
with no visible damage
<azonenberg>
Very nice
<bart416>
I think it'd do for a clean room window :D