How do burning circuit boards compare with all this? It is/was done with contact printing with collimated light, if I have it right.
How do burning circuit boards compare with all this? It is/was done with contact printing with collimated light, if I have it right.
"Landscapes exist in the material world yet soar in the realms of the spirit..." Tsung Ping, 5th Century China
Do you mean the microlithography systems that make the processor chips ? If so, that's on another level again. Even the lens-based systems that are now being superseded were operating at over 10,000 lp/mm. They are like giant macro lenses that work at about 4 to 1 or 5 to 1 reduction.
I like the story about the Cuban farmer on the dunny on page 78 !
The latest nanolithography machines produce IC's with 5nm feature sizes. That's about 1/100th the wavelength of green light and 200,000 line pairs/mm.
The technology is quite remarkable:
The light source
https://www.youtube.com/watch?v=5Ge2RcvDlgw
The optics
https://www.youtube.com/watch?v=V__HbVlnICc
Darkroom Automation / Cleveland Engineering Design, LLC
f-Stop Timers & Enlarging meters http://www.darkroomautomation.com/da-main.htm
I know, we make precision optics in North Wales, but that stuff is about 100x more accurate that what we do !
I saw a presentation document about this 2 years ago, but it looks like they've updated it since :
https://www.euvlitho.com/2019/P24.pdf
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