<soul-d>
http://www.megauk.com/pcb_chemicals.php  was the resist i know of  available in eu  although that website listed on homecmos does have digy-key listed as distributor  , and few others that have a webpage
<soul-d>
although i woulnd mind to volunteer for the uk type  resist  (cheap applicator version ) since ive some pieces of uncoated copper for wich i can use it anyhow
<soul-d>
although the one you found already is a known to work on other materials
<azonenberg>
If you want to test it and post results, go for it
<azonenberg>
Finding vendors in various countries that will sell small volumes (suitable for hobbyists) is a major area we need to work on
<azonenberg>
most of my vendors only sell to the US and maybe canada
<soul-d>
yeah saw some distributors though but still  then it it's a chemical  wich usaly is heavily restricted to
<soul-d>
but that ill volunteer for that  wafers shouln'd be  a problem once i know little bit  more (been reading some books  ;)  ) woulnd even mind calling around company's  never hurts to ask
<soul-d>
i mean i have asml  10 miles from me ;)
<azonenberg>
Lol
<soul-d>
though don't have the cash for their products sadly
<azonenberg>
What? :P
<azonenberg>
just go take out a home equity loan for $250K
<azonenberg>
maybe you'll be able to afford 1/50 of a nice stepper ;)
<soul-d>
in this crisis ? banks don;t give anything
<azonenberg>
Lol
<soul-d>
they want though
<azonenberg>
Not that you'd have anwhere to fit a 22nm stepper
<azonenberg>
i hear they're big
<soul-d>
if you can afford it  you probably can store it somewhere or hire a place
<azonenberg>
Lol
<azonenberg>
If you can afford it you're probably a fortune 500 company or the CEO of one
<azonenberg>
i hear the new ones go for on the order of 5E7 USD
<soul-d>
thought they wen't for  like 5x mln
<azonenberg>
No, those are the old ones for 350nm ish
<azonenberg>
i guarantee a 22nm immersion stepper will run you tens of million
<soul-d>
and i was thinking i almost saved enough :(
<azonenberg>
Lol
<azonenberg>
But I think that a 1um ish resolution stepper should be buildable for a few thousand USD
<azonenberg>
and ~10um for even less
<soul-d>
ive mostly been reading on the whole processes so far terminology  and on how feasable it is for people in europe
<azonenberg>
then a pair of door hinges and some nuts and bolts to hold it on
<soul-d>
oh it doesn't like
<soul-d>
now it wasnt me to lgin to ciontue browsingh
<azonenberg>
lol
<soul-d>
yeah probably blocked me
<soul-d>
what is your light source btw you do your mask lighting at home ? i think i saw you mention halogen ?
<azonenberg>
I have at one occasion or another used flashlights, halogen bulbs, mercury vapor fluorescent tubes, and 385nm LEDs
<azonenberg>
right now my lamp of choice is a halogen microscope lamp
<soul-d>
k cause best diffused ?
<azonenberg>
No
<azonenberg>
You dont want it diffuse, you want a parallel beam
<bart416>
The ideal light source is a laser for this
<bart416>
But the issue is getting a wide enough beam
<azonenberg>
bart416: Yeah - ideally i'd have a 365nm excimer laser with a condenser and expander
<azonenberg>
to get a 20mm top-hat profile disk
<bart416>
Some laser assemblies from industrial laser cutters can actually go to that I think
<bart416>
But not in the right frequency range
<azonenberg>
bart416: at 365nm? I doubt it
<azonenberg>
maybe 1080 or something
<bart416>
I meant the beam width :P
<azonenberg>
Oh, yeah
<azonenberg>
lol
<bart416>
Starting from a small focused beam
<bart416>
But it's questionable if the setup will be as effective in the 350nm range
<azonenberg>
Why?
<azonenberg>
and 350 is short
<azonenberg>
it'd be 365 to 405
<azonenberg>
thats the peak sensitivity range
<bart416>
Just saying range :|
<azonenberg>
Well, the beauty of duplicating existing work
<azonenberg>
Is that you know it's doable
<bart416>
The materials used in those laser cutting assemblies is chosen in such a way to only work for certain frequency ranges in a lot of cases :(
<azonenberg>
Oh, you wouldnt use the same exact assemblies
<azonenberg>
Just a similar lense arrangement
<bart416>
The beauty of the laser cutting systems is the variable focus though
<azonenberg>
focus? The goal is a pretty parallel beam
<azonenberg>
you dont want a point
<azonenberg>
once its adjusted it shouldnt need to be changed
<bart416>
The thing is, the variable focus is what will allow you to do this well ;)
<bart416>
You can use the same assembly to varry the beam intensity
<bart416>
allowing you finer control over exposure
<bart416>
And if necessary direct write
<soul-d>
something tells me it has a price tag to go with it
<azonenberg>
woo, i may be able to evaporate sooner rather than later... a guy i was working with got a small bell jar and mechanical pump that he says he'll let me play with after the experiments are done
<azonenberg>
I just have to get myself a diffusion pump to go to deeper vac
<azonenberg>
And said bell jar is on a baseplate with a couple of high current feedthroughs ;)
<soul-d>
bell jar  lab glassware btw ?like from sodiumborsilisomthing ?
<azonenberg>
I think its borosilicate glass but not sure
<azonenberg>
its rated for high vacuum, thats all i know
<azonenberg>
He's not going very deep so they only have a roughing pump, but nothing would stop me from hooking up a high-vac pump later on
<soul-d>
yeah we have 1$ like  shops selling somthing in the shape  but  don't think that would hold out ;)
<azonenberg>
no, this is the real deal
<soul-d>
yeah i have a healty aversion to be near stuff that might ex or implode
<azonenberg>
Thats why you put a cage over it
<bart416>
soul-d, a belljar imploding isn't nearly as dangerous as getting HF over your hands
<azonenberg>
Strong HF, yes
<azonenberg>
shrapnel vs 2% is debatable
<bart416>
imploding belljars don't create that much shrapnell
<bart416>
don't ask how I know :P
<azonenberg>
Lol
<soul-d>
always expect the unexpected:P
<azonenberg>
soul-d: And if you aren't wearing goggles in your lab, you should be :p
<soul-d>
oh i ualy wear gogles even undewr full face screen :D