http://web.science.oregonstate.edu/~minote/wiki/ 2008-06-28T13:04:37-07:00 http://web.science.oregonstate.edu/~minote/wiki/ http://web.science.oregonstate.edu/~minote/wiki/lib/images/favicon.ico text/html 2008-06-20T14:25:39-07:00 landon http://web.science.oregonstate.edu/~minote/wiki/doku.php?id=eric_sundholm_s_recipe&rev=1213997139&do=diff Eric is an EE grad student who TAs the EE class on chip making & has made hundreds of chips in the Owen clean room. His advice should be heeded. * Spin 1818 photoresist at 3000 rpm for 30 seconds (2 um layer) * Bake at 85C for 2 minutes * Expose for 6-8 seconds text/html 2008-06-20T14:20:51-07:00 landon http://web.science.oregonstate.edu/~minote/wiki/doku.php?id=device_making&rev=1213996851&do=diff We have developed a recipe for nanotube transistor fabrication that works with our clean room facilities at OSU. The recipe is based on the 1998 Nature article by Kong et al. After growing nanotubes on silicon wafers we do photolithography and evaporate metal contacts on the nanotubes. The tubes grow fairly consistently, so we make the electrode pattern without looking where the nanotubes grow. There is some luck involved here. Only 10 % of devices come out with single nanotubes. On each chip we… text/html 2008-06-20T14:19:48-07:00 landon http://web.science.oregonstate.edu/~minote/wiki/doku.php?id=eric_johnson_s_recipe&rev=1213996788&do=diff Eric is an EE grad student who TAs the EE class on chip making & has made hundreds of chips in the Owen clean room. His advice should be heeded. * Spin 1818 photoresist at 3000 rpm for 30 seconds (2 um layer) * Bake at 85C for 2 minutes * Expose for 6-8 seconds text/html 2008-06-20T11:43:06-07:00 ethanminot http://web.science.oregonstate.edu/~minote/wiki/doku.php?id=probe_station&rev=1213987386&do=diff Daniel is currently “master of the probe station”, please see him before using it. Standard operating proceedure Nanotubes burn up like a fuse if currents get too high. This can happen several ways. * Electrostatic discharge (especially dangerous with quartz substrates). Your body is like a van der Graph generator when insulting shoes walk across an insulating floor. Quartz substrates are also insulting, so the circuit on top of quartz can build up significant charge while it sits in the bo… text/html 2008-06-20T11:41:27-07:00 ethanminot http://web.science.oregonstate.edu/~minote/wiki/doku.php?id=water_gating&rev=1213987287&do=diff return to probe station When working with devices underwater we need good control of the solution potential. The reference electrode we use is RE-6 from Bioanalytical systems. A manual is available. It is critical that the electrode is always wet, and always stored in 3M NaCl solution.