--- Sat Nov 12 2011 | 00:00 | |
azonenberg | Woot! | 18:27 |
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azonenberg | New toy :D | 18:27 |
azonenberg | 12" ish bell jar and 2-stage rotary vane vacuum pump | 18:27 |
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 | 18:28 |
azonenberg | Once i can run two lines at a couple kV into it, time to start sputtering :) | 18:28 |
azonenberg | we've already hit pressures at the sub-100mtorr range which should be adequate | 18:29 |
azonenberg | So the only other thing to do is work out how to do an argon purge | 18:29 |
soul-d | meaning you need a vacuum then fill chamber with argon only ? | 18:34 |
azonenberg | soul-d: yes | 18:35 |
azonenberg | to sputter properly i will need around 100mtorr of argon | 18:35 |
azonenberg | or, reactively, a mixture | 18:35 |
azonenberg | say 70mtorr of argon + 30mtorr of nitrogen to sputter a nitride | 18:36 |
azonenberg | (numbers are just a guess, the proper partial pressures i'd have to look up) | 18:36 |
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 ? | 18:45 |
azonenberg | I'd have two needle valves feeding in | 19:30 |
azonenberg | So start out by pumping the chamber down as low as it goes | 19:30 |
azonenberg | then open the valves and gently start feeding gas in at the proper rates | 19:30 |
azonenberg | as we add inert gas and remove gas from the chamber the amount of air will quickly go to near zero | 19:30 |
azonenberg | then we can start sputtering | 19:30 |
soul-d | you make it sound easy | 20:06 |
azonenberg | soul-d: lol | 20:26 |
azonenberg | conceptually, it is easy :p | 20:26 |
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 | 20:38 |
bart416 | a propper chemical lab is really expensive | 21:37 |
bart416 | a good lab table alone can cost a small fortune | 21:37 |
azonenberg | bart416: i know | 21:38 |
azonenberg | i'm going cheap since i know what i'm working with | 21:38 |
azonenberg | my hood will be a 2 foot cube of PVC with an acrylic sash | 21:38 |
bart416 | I was talking about soul-d :P | 21:41 |
bart416 | you have sort of a clue what you're doing | 21:42 |
bart416 | a chemically inert lab table is so important if you are going to be doing a lot of experiments :P | 21:42 |
azonenberg | bart416: yeah | 21:43 |
azonenberg | I actually know what i'm doing | 21:43 |
azonenberg | the PVC is fine, the acrylic will be damaged by acetone splashes | 21:43 |
azonenberg | but i hope to keep them to a minimum | 21:43 |
azonenberg | It'll hold in any accidental release, just need to be replaced after | 21:44 |
bart416 | remember that CR-39 we were talking about? | 21:44 |
bart416 | I managed to get a hold on a rod of it | 21:45 |
azonenberg | Which was that again? refresh my memory | 21:45 |
soul-d | oh not realy bart416 | 21:45 |
soul-d | there are some recipy's for painting tables | 21:45 |
bart416 | the transparent material that was resistant to solvents | 21:45 |
azonenberg | oh | 21:45 |
azonenberg | yeah | 21:45 |
bart416 | tried it | 21:45 |
bart416 | it survived 24 hours in chloroform... | 21:46 |
bart416 | with no visible damage | 21:46 |
azonenberg | Very nice | 21:46 |
bart416 | I think it'd do for a clean room window :D | 21:48 |
azonenberg | Lol, yeah | 21:48 |
--- Sun Nov 13 2011 | 00:00 |
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