| fpgaminer | azonenberg: I am terribly excited for your work on homebrew ASICs! :D | 00:21 |
|---|---|---|
| kristianpaul | damn, i have problems with 'we' timings.. | 03:12 |
| kristianpaul | arghs, well at least i got ff when not rf front end, but.. | 03:14 |
| Action: kristianpaul realizes how usefull a "bus" tap will be | 03:15 | |
| azonenberg | lekernel: http://i.imgur.com/qT8tG.png | 06:36 |
| azonenberg | Finally | 06:37 |
| azonenberg | I added a few more tests to measure my exact FOV andcheck for edge effects | 06:37 |
| roh | morning | 06:41 |
| roh | what a nice time of the day. productive. nobody else seems awake. great | 06:41 |
| azonenberg | Lol yep | 06:42 |
| roh | is 8:42am here. | 06:42 |
| azonenberg | And its 02:42 here | 06:43 |
| azonenberg | So not many people awake :p | 06:43 |
| roh | yours is even better. i get most stuff done between 2am and 6am usually | 06:44 |
| roh | hm. today is material ordering day. | 06:46 |
| azonenberg | I wish it was for me too | 06:56 |
| azonenberg | Have to wait for some checks to clear first | 06:56 |
| roh | thats what just happened to me. customers paying invoices. *yay* | 06:56 |
| azonenberg | Yeah - a month late in this case | 06:56 |
| roh | thats usual. sure. have those too ;) | 06:57 |
| azonenberg | *want* http://www.mtixtl.com/siwafer1004diax05mm1spntypepdopedresistivities15ohm-cm.aspx | 07:07 |
| fpgaminer | azonenberg: is that a companion cube? :P | 07:26 |
| azonenberg | fpgaminer: Yes | 07:26 |
| fpgaminer | nice | 07:26 |
| azonenberg | this test mask is designed to test a couple of different things | 07:26 |
| azonenberg | Resolution, alignment of multiple mask levels | 07:26 |
| azonenberg | Edge effect, exact FOV | 07:27 |
| azonenberg | Characterize etch rates | 07:27 |
| azonenberg | And, in the case of the cube, the potential of etched Si as an artistic medium :P | 07:27 |
| azonenberg | i got the idea from http://xkcd.com/260/ | 07:27 |
| azonenberg | Except this is Si instead of SiO2 | 07:28 |
| fpgaminer | :P | 07:28 |
| fpgaminer | Why not design a circuit in the shape of a companion cube? Then it would be both form and function! | 07:28 |
| azonenberg | Lol the mounting will be far from ESD safe | 07:29 |
| azonenberg | Bare ~1cm die mounted with cyanoacrylate glue to a 1 inch stainless steel disk | 07:29 |
| azonenberg | Debating whether to try growing thermal oxide over the Si to make it a little more scratch resistant | 07:30 |
| azonenberg | Or encapsulating it in some kind of polymer | 07:30 |
| azonenberg | In any case when it's done, sputter in a few nm of Au or Pt | 07:30 |
| fpgaminer | So will your first test be just to make sure the resolution and such is correct and the process is holding up to your hopes? No functional transistors for awhile, I assume. | 07:31 |
| azonenberg | Correct | 07:31 |
| azonenberg | The first functional test will be a comb drive, actually | 07:31 |
| azonenberg | Still no transistors | 07:31 |
| azonenberg | After that, i'll have to get some TMAH (current developer is NaOH which doesnt play well with CMOS) | 07:32 |
| azonenberg | Try making some simple logic cells (single inverter etc) | 07:32 |
| azonenberg | Followed by a ring oscillator | 07:32 |
| azonenberg | I'm going to need to get myself some microprobes for testing as there's no way i can use a multimeter on these things :P | 07:32 |
| azonenberg | I had some around the apartment but they belonged to a former roommate who has since graduated | 07:33 |
| fpgaminer | You can use a multimeter, just sharpen the probes with a knife! :P | 07:34 |
| azonenberg | Lol | 07:36 |
| azonenberg | Good luck getting them to 5 micron tips | 07:37 |
| fpgaminer | Depends on how steady your hands are | 07:39 |
| azonenberg | Lol | 07:39 |
| azonenberg | I've done microsurgery on 200um PCB traces | 07:39 |
| azonenberg | I've soldered 25um bond wires to probe tips | 07:39 |
| azonenberg | (with difficulty) | 07:40 |
| azonenberg | but 5um is probably beyond me | 07:40 |
| fpgaminer | Daaang. I could probably never do that. My hands shake too much :/ | 07:42 |
| fpgaminer | Makes soldering a pain | 07:42 |
| azonenberg | This was a pain because i couldnt actually pick up the wire easily with my tweezers | 07:43 |
| azonenberg | My new tweezers would prob make it a lot easier | 07:44 |
| fpgaminer | Well, even though I don't know too much about the ASIC production process, I am very excited about your work. | 07:45 |
| fpgaminer | Homebrew ASICs sound like a dream come true! | 07:45 |
| azonenberg | Lol, ASIC is a ways out | 07:46 |
| azonenberg | But would certainly be nice | 07:46 |
| fpgaminer | Yeah, I know it will take a long time, but it's still really cool | 07:46 |
| fpgaminer | and any progress is good progress | 07:46 |
| azonenberg | lol yep | 07:48 |
| fpgaminer | Just let me know when the process is advanced enough to re-create the 6502 :) | 07:50 |
| azonenberg | Lol | 07:53 |
| azonenberg | 4004 will probably come first | 07:53 |
| azonenberg | A serious goal is to make a working 1:1 replica off published mask art | 07:53 |
| fpgaminer | Is the mask art for the 4004 published? | 07:54 |
| azonenberg | Yes | 07:55 |
| azonenberg | In any case, copyright is expired and you could just reverse it | 07:55 |
| azonenberg | But that saves us the trouble | 07:55 |
| azonenberg | One question is whether my process would be compatible enough to actually use their masks | 07:55 |
| azonenberg | i'd be using metal gates instead of poly for example | 07:55 |
| lekernel | azonenberg: regarding sharpening tips, have you had a look at those DIY tunneling microscopes? | 08:17 |
| azonenberg | No, the only EM i was considering making was a SEM | 08:17 |
| azonenberg | And i can buy tungsten probe tips for cheap from signatone | 08:17 |
| azonenberg | $55 per 5-pack | 08:17 |
| lekernel | http://www.e-basteln.de/index_o.htm | 08:17 |
| lekernel | http://sxm4.uni-muenster.de/stm-en/ | 08:17 |
| lekernel | I'm just pointing out some ways you could make sharp tips e.g. for probing your creations ... | 08:18 |
| azonenberg | *reads* | 08:18 |
| azonenberg | lekernel: This look about right? http://i.imgur.com/Mzycj.png | 09:45 |
| azonenberg | blue = metal 1, green = N+ diffusion, yellow = P+ diffusion, red = metal gate, white = via 0 | 09:45 |
| xiangfu | azonenberg: just want know, what are you doing? | 10:03 |
| azonenberg | lekernel: Somebody just pointed out I forgot the N-well around the pmos device :P | 10:04 |
| azonenberg | fixed now | 10:04 |
| azonenberg | xiangfu: Homebrew MEMS and eventually CMOS fab | 10:04 |
| xiangfu | azonenberg: cool | 10:19 |
| azonenberg | http://i.imgur.com/y7LzG.png | 11:04 |
| azonenberg | lekernel: thoughts? This is an improved version of the last link, you can ignore that one | 11:05 |
| kristianpaul | hey, nice | 11:07 |
| azonenberg | kristianpaul: you know what it is? | 11:08 |
| kristianpaul | d flipflop? | 11:08 |
| kristianpaul | ah no.. | 11:09 |
| kristianpaul | clock? | 11:09 |
| kristianpaul | just guessing now :_) | 11:09 |
| azonenberg | kristianpaul: ring oscillator | 11:10 |
| methril_work | this is a new field for me.... :O | 11:31 |
| lekernel | wolfspraul: what are the PoE injectors for? | 13:38 |
| lekernel | http://en.qi-hardware.com/wiki/Milkymist_One_accessories | 13:38 |
| wolfspraul | just an old collection of power supply pictures, mostly to compare labels and certifications and identify power supply factories | 13:47 |
| wolfspraul | I have those supplies because of the Elphel cameras | 13:47 |
| wolfspraul | strangely enough I never even heard about power-over-ethernet before Elphel, even though it's around for so long already | 13:47 |
| wolfspraul | I think it never really caught on, mostly because it's patented a lot from what I've heard | 13:48 |
| wolfspraul | no worries, the little I learnt about PoE from Elphel was that I don't want to deal with PoE :-) | 13:48 |
| CIA-51 | flickernoise: Sebastien Bourdeauducq master * r2552650 / (4 files): Make autobuild folders consistent - http://bit.ly/k4lYpW | 17:19 |
| CIA-51 | flickernoise: Sebastien Bourdeauducq master * rd9f461d / (4 files): Merge branch 'blah' - http://bit.ly/mxAuMx | 17:19 |
| kristianpaul | !top 20 | 17:25 |
| kristianpaul | lekernel: getting fun? :) | 19:49 |
| lekernel | ? | 19:50 |
| kristianpaul | albatart.org? | 19:51 |
| lekernel | yeah it's a mega-squat in paris | 19:51 |
| lekernel | it's about to close soon unfortunately | 19:51 |
| kristianpaul | may be i missudertood the naim of the fair you were going to | 19:51 |
| lekernel | actually it's probably my last night here | 19:52 |
| lekernel | it's totally crazy stuff, a 8-story building (plus underground parkings) in the city centre - was a former bank | 19:52 |
| lekernel | with air conditioners, elevators, automatic doors, etc. | 19:53 |
| kristianpaul | looks interesting | 20:02 |
| roh | 21:04 | |
| lekernel | roh: ? | 21:32 |
| roh | -> laggy | 21:52 |
| --- Thu May 26 2011 | 00:00 | |
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