On 2/1/22 4:25 PM, Philipp Gühring wrote:
Hello,
Well, being cost-effective and reliable I'd suggest to use components similar to CD or DVD players.
Wait a moment. CD/DVD burners are using heat and lasers to burn holes into flat wafers in a rather high precision way. Isn't that something we could use instead of photo-lithography+etching? It's just a hole at a time instead of a whole stepped pattern (or even a whole wafer), and we might have some challenge to get the laser to produce the patterns that we need, but wouldn't that be usable somehow? Bluray writers should be able to produce 130nm x 150nm holes
I bet, we can cannibalise cheap laser-diodes from Blu-ray devices. I do not really like this DRM-stuff anyway :-)
BTW, Blu-ray devices use 405 nm laser-diodes [0] - which is *precisely* the H-line on ultraviolet photolithography [1]. The H-line is still visible for the human eye and known as "black light".
Are we crazy, thinking about a laser beamer, which is a turntable instead??? Doing Layouts not in a Cartesian but in a Polar coordinate system??? Even spin-coating seems to work.
- Minutes later -
Okay, I got lost on youtube watching a lot of DIY stuff with Blu-ray laser-diodes. Don't do this at home [2] :-o I guess a diode for Blu-ray players "ought to be enough for anybody"..
Regards, Hagen.
[0] https://en.wikipedia.org/wiki/Blu-ray#/media/File:Comparison_CD_DVD_HDDVD_BD... [1] https://commons.wikimedia.org/wiki/File:Spectrum_of_lithography_lights.PNG [2] https://www.youtube.com/watch?v=fJ77l23xwak