B0101 | hi azonenberg | 02:33 |
---|---|---|
azonenberg | hi | 02:33 |
B0101 | I tried going to the wafer supplier... | 02:33 |
azonenberg | and? | 02:33 |
B0101 | i found nothing with the name of Latech... untill i got back home | 02:34 |
azonenberg | ? | 02:34 |
B0101 | and i found that i was at the correct building... wrong position... | 02:34 |
B0101 | and their directory was not updated | 02:34 |
azonenberg | lol | 02:34 |
B0101 | When i found out... my mind was thinking: "darn..." | 02:36 |
B0101 | gonna be afk... bbl | 02:36 |
B0101 | back | 02:50 |
Anarchos | hello | 13:01 |
azonenberg | hi | 13:04 |
Anarchos | azonenberg hi how are you ? | 13:07 |
azonenberg | good, you? | 13:07 |
Anarchos | i am fine too | 13:07 |
Anarchos | i am looking for standard cell libraries for Electric | 13:08 |
azonenberg | Never used it, sorry | 13:08 |
azonenberg | Most of our work at the moment is lower level than that | 13:08 |
azonenberg | process development etc | 13:08 |
azonenberg | i'm fighting yield issues in the lithography atm | 13:08 |
Anarchos | what are yield issues ? | 13:09 |
bart416 | The amount of succesful attempts vs total amount of attempts | 13:09 |
Anarchos | ok | 13:10 |
azonenberg | for example, an array of continuous parallel lines | 13:10 |
azonenberg | that ends up looking like this instead http://colossus.cs.rpi.edu/~azonenberg/images/homecmos/2011-08-26/5h10_004_annotated.jpg | 13:10 |
Anarchos | i was looking for an irc channel about Electric or vlsi or cmos, this is the only one i found | 13:10 |
azonenberg | (evaporated copper on <100> Si | 13:10 |
azonenberg | and yeah, we are mostly on the DIY fab side of things | 13:10 |
azonenberg | if and when we get a working cmos process try your question again lol | 13:11 |
Anarchos | azonenberg sure :) | 13:11 |
azonenberg | but at the rate things are going (and considering i have a phd to work on and am not doing this full time or even close to it) | 13:11 |
azonenberg | it will be a while lol | 13:11 |
Anarchos | azonenberg ho nice scale on your jpeg :) | 13:11 |
Anarchos | what kind of mask do you use ?* | 13:12 |
azonenberg | Anarchos: The 5um process is still being debugged, the 20 is working a lot better | 13:12 |
azonenberg | laser printer on plastic transparency film lol | 13:12 |
azonenberg | reduced 10x or 40x (for the 20 and 5 micron processes respectively) by projection lithography | 13:12 |
azonenberg | http://colossus.cs.rpi.edu/~azonenberg/images/homecmos/2011-08-06/S7301603.JPG is a test die done on the 20um process | 13:14 |
azonenberg | nyanotechnology ;) | 13:14 |
azonenberg | this is, like the other one, evaporated copper on <100> silicon | 13:14 |
azonenberg | mag of this image is 100x | 13:14 |
azonenberg | The pixels blurring against each other were violating DRC by touching at corners | 13:15 |
Anarchos | azonenberg and how do you evaporate copper at home ? lol | 13:15 |
azonenberg | Anarchos: I wish i could lol | 13:15 |
azonenberg | i did that in a lab on campus and have been working with the results ever since | 13:15 |
azonenberg | at home | 13:15 |
azonenberg | its on the to-do list though | 13:15 |
azonenberg | i just need a bell jar, mechanical pump, diffusion pump, and variac | 13:15 |
azonenberg | the theory is trivially simple and you dont need really tight alignment tolerances etc | 13:16 |
Anarchos | azonenberg eh eh "do your sparc 64 VIIIfx at home " :) | 13:16 |
azonenberg | just reasonably deep vacuum | 13:16 |
azonenberg | But right now i have two or three wafers with evaporated metal films on them i've been gradualyl running experiments on | 13:16 |
azonenberg | And the current focus is actually mems, not cmos | 13:18 |
azonenberg | i want to build a comb drive | 13:18 |
azonenberg | http://i.imgur.com/CMaJN.jpg was a test of line edge roughness on the 20um process | 13:18 |
azonenberg | i want to do some SEM cross sections soon (benefits of knowing the matsci lab manager ;) ) | 13:18 |
azonenberg | to measure edge profiles etc | 13:19 |
azonenberg | http://i.imgur.com/we2Mp.jpg was the best i've done so far for cross sectioning and optical imaging | 13:19 |
azonenberg | the copper is around 150um wide and 30 high lol | 13:20 |
Anarchos | so i will continue my quest of standard cells :) | 13:20 |
azonenberg | my 20um features in ~1um layers wont even show up at this mag | 13:20 |
azonenberg | much less provide useful slow values | 13:20 |
azonenberg | and yep, good luck | 13:20 |
swkhan | if i don't have a scale or a triple beam balance, how can i accurately (or at least precisely) measure out a certain mass of something? | 18:16 |
swkhan | i've been putting this on hold for a while. i want to make sodium sulfate, ultimately so i can mix it with copper sulfate and get electroplated copper. i'm not sure i have all the equipment yet but i want to see if i can make some of the stuff today at least | 18:17 |
bart416 | Meh, use a kitchen scale | 18:50 |
bart416 | 0.1g is precise enough for most things | 18:50 |
azonenberg | swkhan: I found a scale on ebay good to 1mg | 20:03 |
azonenberg | in graduation | 20:03 |
azonenberg | actual accuracy maybe +/- 2 or 3 | 20:03 |
bart416 | The issue with scales that go down to 1mg is that airflow and pressure will actually have a noticable affect | 22:55 |
bart416 | You need to put a cover over it to get a good reading | 22:55 |
azonenberg | bart416: i've noticed lol | 22:57 |
XgF | Every 1mg scale I've worke dwith has had a glass surround | 22:57 |
azonenberg | breathe on it and it fluctuates by a decent amount | 22:57 |
azonenberg | this has a plastic cover | 22:57 |
azonenberg | its cheap, but is noticeably better accuracy than the 10mg i have | 22:57 |
bart416 | XgF, we were fighting for the ones with the covers during the labs | 22:59 |
bart416 | Except if it was something volatile that was hard to scoop up | 22:59 |
bart416 | Cause the cover makes that rather hard :( | 22:59 |
azonenberg | bart416: lol | 22:59 |
azonenberg | use a micropipette and go by volume? | 22:59 |
XgF | :S we had covered 1mg scales back in sixth form | 22:59 |
bart416 | XgF, the covers got blown off :P | 23:00 |
bart416 | In miniature explosions | 23:00 |
azonenberg | lol | 23:00 |
bart416 | Hence, some scales didn't have any covers left | 23:00 |
azonenberg | i imagine it wasnt healthy for the scale either | 23:00 |
azonenberg | anything that intense probably fried the load cell | 23:01 |
bart416 | Weirdly enough after being calibrated again it doesn't really seem to have any effect :S | 23:01 |
azonenberg | o_O | 23:01 |
XgF | What? The scales i'm thinking of have a steel frame which is an extension of the case, with glass plates attached to the inside of the frame | 23:01 |
bart416 | past a certain load it rests on a metal pad instead of transfering pressure to the load cell I guess | 23:01 |
bart416 | never ever use one of them to weigh blackpowder XgF! | 23:02 |
XgF | Hah | 23:02 |
bart416 | it doesn't just lift the lid | 23:02 |
bart416 | it blows the glass or plastic out lol | 23:02 |
XgF | Why would you weigh BP? Weigh the constituent ingredients then mix | 23:03 |
azonenberg | Also, if it is spontaneously igniting you probably have ESD problems | 23:03 |
azonenberg | get better grounding | 23:03 |
XgF | Yeah. My BP has never blown up without me asking it to | 23:04 |
bart416 | XgF, mine neither | 23:04 |
bart416 | But some people managed it :S | 23:04 |
azonenberg | was this for a class project? | 23:04 |
bart416 | Yes | 23:04 |
XgF | Back in college I once set fire to a desk... | 23:05 |
azonenberg | no fair, you get to play with explosives in class? | 23:05 |
bart416 | Yes | 23:05 |
bart416 | We also managed to crack a ceramic table top btw | 23:05 |
azonenberg | how | 23:05 |
bart416 | well, not we | 23:05 |
bart416 | Another class did during the same experiment | 23:05 |
azonenberg | with BP? | 23:05 |
bart416 | Somebody built a miniature rocket engine with a test tube somehow | 23:05 |
azonenberg | ... | 23:06 |
azonenberg | BP is a low explosive | 23:06 |
bart416 | (with something more volatile than bp) | 23:06 |
azonenberg | it *should* not explode unless confined | 23:06 |
bart416 | It managed to knock lose a piece of metal and take it along and smash into the table | 23:06 |
XgF | (We were heating some ethanol. Perhaps I was heating it too vigorously; it decided it would like to be on fire. When I was placing a gauze on top to remove the oxygen supply... I knocked over the flask...) | 23:06 |
azonenberg | lol | 23:06 |
bart416 | lol XgF | 23:06 |
bart416 | Also fun was "disolve this little block of marble and calculate how much carbon and calcium it contains" | 23:07 |
bart416 | Oh was that one fun... | 23:07 |
bart416 | Half the gas captured was actually our table disolving instead of the piece of marble | 23:07 |
Action: XgF snorts | 23:08 | |
bart416 | Something about not providing propper equipment | 23:08 |
bart416 | lol | 23:08 |
XgF | I also remember a bung on a tube full of conc H2SO4 (I forget the name of that particular pecie of equipment :P) blowing out in my hand... | 23:09 |
bart416 | Fun | 23:10 |
--- Mon Sep 12 2011 | 00:00 |
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