azonenberg changed the topic of #homecmos to: Homebrew CMOS and MEMS foundry design | Wiki: http://homecmos.drawersteak.com/wiki/Main_Page | Repository: http://code.google.com/p/homecmos/ | Logs: http://en.qi-hardware.com/homecmos-logs/
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<CaptHindsight> so this project is to diy cmos using traditional approaches
<CaptHindsight> photoresist is easy enough to make
<CaptHindsight> 1um lines using a CW 405nm laser
<CaptHindsight> at 1um you print organic semiconductors
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<CaptHindsight> using the laser and inverse microscope you're not limited to silicon for MEMS, you can use all sorts of functional materials
<CaptHindsight> are most here planning on just trying to make CMOS devices?
<_Sync_> that depends
<CaptHindsight> is the average price of SU-8 is. $600 per liter?
<CaptHindsight> According to Yole Développement (www.yole.fr), the average price of SU-8 is $600 per liter.
<CaptHindsight> I'll be happy to make it for $500/kg ~L
<berndj> do you _need_ to use SU-8, won't DNQ work?
<berndj> azonenberg (hey where is he btw) did some MEMS experiments with DNQ AFAIK, and had some issues with flaking / delamination / etchand seeping through the cracks in the resist
<CaptHindsight> depends on what you want to do with it
<CaptHindsight> su-8 is very common with lots of recommendations on how to cure it
<CaptHindsight> but it's really nothing special as a photopolymer
<berndj> i thought the problem su-8 presents is how to get the cured bits *off* again
<berndj> (without also removing what it's cured onto)
<CaptHindsight> thats really not that complicated
<CaptHindsight> there are lots of water soluble or organic solvent soluble components
<CaptHindsight> I wasn't aware of its price
<CaptHindsight> I wonder if there is a process patent that blocks competition
<berndj> wouldn't that have expired already, unless it's an improved process that came a good bit later than SU-8 itself?
<CaptHindsight> yeah, I think it's been around for quite some time
<CaptHindsight> I've never used SU-8, just seen it referenced often in literature
<CaptHindsight> free radical curing of epoxy with triarylsulfonium salt goes back to 1977 :)
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<azonenberg> o/
<azonenberg> diginet: you rang?
<azonenberg> was having dinner
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