<
azonenberg>
horizontally: So i can now theoretically hit 350nm :p
<
horizontally>
350nm what?
<
azonenberg>
Realistically i dont think i'll be able to go quite that small with my optics
<
azonenberg>
Half pitch
<
azonenberg>
12.5um design rule on a photomask from laserlab
<
soul-d>
oh yeah now you mention optics how do you actualy make the image smaller :P
<
azonenberg>
times 40x reduction
<
horizontally>
what are you designing again? comb drive?
<
azonenberg>
horizontally: Oh, i wouldnt make a comb drive that small
<
soul-d>
is it magnifer optics or some microscope optics ?
<
azonenberg>
This is just projecting
<
azonenberg>
soul-d: Microscope objective
<
azonenberg>
I'm going to buy a commercial photomask rather than printing my own, just to see how well it works
<
azonenberg>
Its gonna cost me $100ish but be 10x16 inches
<
azonenberg>
so i plan to shove a ton of small masks onto it
<
azonenberg>
and cut it up
<
azonenberg>
So theoretically, 12.5um design rule * 40x reduction is on the order of 350nm (i think the actual number was 330)
<
azonenberg>
Realistically, i do not think i can go that small
<
azonenberg>
But 1 micron range is definitely doable
<
azonenberg>
We'll find out in a few weeks when i have the time to work on it
<
azonenberg>
Just finished my last final, now i just have to catch up on grading and i can get back to the lab
<
soul-d>
is it same priciple with that objective as with an hand held loupe ?
<
azonenberg>
its just a magnifying lens
<
azonenberg>
i'm using the microscope because its a pre-existing optical column with everything lined up
<
azonenberg>
In thoery
<
azonenberg>
theory*
<
soul-d>
so how does the light come in play in setup
<
azonenberg>
i put the mask on top of the camera port
<
azonenberg>
and put the light behind it
<
azonenberg>
so the light goes throough the mask, throguh the objective, nad is focused on the sample
<
soul-d>
yah i played with the loupe but distance of light source is critical also that paralel thingy
<
soul-d>
of the light or you get fuzzy image
<
azonenberg>
Thats the nice thing about the microscope
<
azonenberg>
everything is already the right distance
<
azonenberg>
The one problem is that my stage is screwed up
<
azonenberg>
it's not exactly perpendicular to the optical axis
<
azonenberg>
they're off by a fraction of a degree
<
azonenberg>
so i cant focus the entire field at once
<
azonenberg>
i need to correct that and havent had time to figure out the best way
<
soul-d>
k but then at least i know it's worth playing with these objectives as cheap alternative
<
soul-d>
also found cheap good working 40x
<
azonenberg>
I've hit 20 microns using a cheap Amscope 40x objective
<
azonenberg>
sorry, a 10x
<
azonenberg>
The 40x is flaky
<
azonenberg>
i also dont know if 12.5um on the input image is going to be too small
<
azonenberg>
But as a minimum 25 to 50 should resolve
<
azonenberg>
which, shrunk 10x, is 2.5 to 5 um
<
azonenberg>
So i am very confident i can go at least that far
<
azonenberg>
but maybe down to 1.25 with the 10x obj
<
azonenberg>
wit hthe 40x, divide those numbers by 4
<
azonenberg>
those last numbers are far more questionable
<
soul-d>
now i have 40x i can use the 10x's for other stuff :)
<
azonenberg>
i'll be at the limit of my optics
<
azonenberg>
I can
*see* features that small
<
azonenberg>
so its not at the diffraction limit
<
azonenberg>
but it'll be close
<
azonenberg>
If i go at all submicron i will be impressed
<
soul-d>
i can at least take pictures trough it so :) thats nice
<
azonenberg>
What kind of CS major am i? :P
<
azonenberg>
i'm sitting here grading homework on computer architecture while chatting IC fab with you guys
<
soul-d>
if you had a 3d printer
<
soul-d>
printing a focus thingy would be trivial
<
azonenberg>
i wish
<
azonenberg>
getting that kind of accuracy is nontrivial
<
azonenberg>
you show me a 3d printer that can make parts to +/-5um tolerances
<
azonenberg>
in a rigid material that wont flex
<
azonenberg>
and i will buy it on sight
<
soul-d>
i mean probably good enough for home usage for the 10x objective :P
<
azonenberg>
No idea
<
soul-d>
din't yiu see the link btw
<
soul-d>
of tineyst 3d printer ?
<
azonenberg>
I never bought into those things
<
azonenberg>
i prefer doing bulk micromachining ;)
<
soul-d>
no it's a ted talk just to present technology
<
soul-d>
he suclpts at nm
<
soul-d>
made some bridge
<
soul-d>
although his english and presentation overal is quite bad :P
<
azonenberg>
Will check it out later
<
azonenberg>
right now i'm about to hit the sack
<
azonenberg>
its only 1900 but i'm on a crazy sleep schedule :p
<
soul-d>
k i don't have a sleep shedule realy :)
B0101 [B0101!dcff0152@gateway/web/freenode/ip.220.255.1.82] has joined #homecmos
soul-d [soul-d!~main@88.159.111.27] has joined #homecmos
azonenberg [azonenberg!~azonenber@cpe-67-246-33-188.nycap.res.rr.com] has joined #homecmos
lekernel_ [lekernel_!~lekernel@g225044243.adsl.alicedsl.de] has joined #homecmos
wolfspra1l [wolfspra1l!~wolfsprau@p5B0AC2C0.dip.t-dialin.net] has joined #homecmos
kristianpaul [kristianpaul!~kristianp@unaffiliated/kristianpaul] has joined #homecmos
lekernel [lekernel!~lekernel@g225044243.adsl.alicedsl.de] has joined #homecmos
cheater [cheater!~cheater@dslb-084-057-048-109.pools.arcor-ip.net] has joined #homecmos