@iraqigeek8363
Huygens Optics' video two weeks ago was about ultra low expansion glass titled "The amazing properties of glass-ceramics" Worth watching as a companion to this video
@fitter1972
I do the high purity chemical and gas piping for wafer manufacturing here in Silicon Valley. I'm what you might call "construction worker smart" lol. Some of the content goes over my head but I appreciate the way you make a lot of it understandable and cover the history of wafer manufacture in the process. Keep up the great work, I'll try to keep up
@Dasycottus
The slurry to grind EUV mirrors is actually made from the blood of a PhD student; sactificed to the Optics Gods
@charmio
It's so wildly impressive that, if the evidence to the contrary wasn't literally in my hands as I speak, I would bet everything I own that it's impossible.
@rando7th
In the late 90s I worked on a university project to coat zerodur mirrors for a NASA satellite imaging the magnetosphere at 30.4 nm. Uranium was our high Z layer. We did use DC magnetron sputtering for deposition. I did get to go on base at Vandenberg AFB to watch the launch up close. TV coverage doesn't capture the incredible acceleration. You got a lot right about this esoteric field.
@makego
Your ability to summarize and convey extremely complex technical innovations is extraordinary! I am thoroughly enjoying the ongoing set of fab process evolution videos.
@luked9470
Optical wavefront error is typically measured with a HeNe Fizeau Interferometer @632.8nm. Common camera lenses are polished to 1/10 wave (63.8nm). Just because the wavelength of EUV tech is around 13.5nm, does not mean the optics required are measured at EUV wavelengths. This would be obsurd. They are measured @632.8. The RMS (roughness) at various spacial frequencies are further measured with atomic force microscopy (afm). This is where you need to achieve true angstrom precision or less. (<0.1nm, or <100 picometers. Thank you for the video.
@JohnDoe4321
12:35 "traditional optical techniques like lapping, which is where you run a dogs tongue over a mirrored surface repeatedly" 🤣🤣🤣
@saxphile
Even after watching this video, I'm still not convinced that EUV lithography isn't magic.
@6or7breadsticks
The youngest Nobel in physics, that’s something to brag about.
@manuellongo4365
Very often this channel deals with infiiniitesimally small items - often down to single atoms - yet there are people who work at this scale. A lot of this work is driven by research into semiconductor manufacture, all in the quest to go smaller.....and the famous Moore's Law keeps getting pushed back. Truly amazing and expertly explained - at times I get lost, simply because my knowledge reaches it's limit
@dante7228
It's mind blowing to learn so much about all this Hightech yet having absolutely no use for it. I'll go back to my gardening job... Love this channel anyways!
@parkerbond9400
Here so early Bragg hasn't published his formula yet
@jpurrazzella
Well done. I didn't realize they got to this level on mirror quality on the optical system so long ago. This is a great training video for people coming into the industry.
@LiborTinka
The channel Huygens Optics recently made a video about glass-ceramics including the ultra low expansion coefficient materials. Fascinating content just like this.
@BrianBHatteras43c
Excellent, informative content with just the right amount of wit and sarcasm… definition of lapping a mirror (12:39), that’s what I am here for. Also shoutout for that great interview with Dwarkesh.
@Quickshot0
That's some crazy levels of precision they made those mirrors to, to think we're actually capable of those kind of precisions in a mass produced object. Admittedly a very low volume mass produced object, but even so... They've been making these by the hundreds and maybe even going towards four digit numbers. Kind of amazing to think there are that many absurdly precise mirrors in the world.
@ronaryel6445
Thank you for the great video. For perspective, consider the fine grinding and polishing of the mirrors on the Hubble Space Telescope in the 1970s. Putting aside the design error (not manufacturing error) of one of the Hubble's mirrors, Perkin-Elmer Corp. used a computer-controlled machine to grind and polish each mirror, and did better than the required standard of an error not more than 10 nanometers.
@nickj2508
when you next talk about the EUV light source, it may be worth mentioning that if it didn't work, the industry had a backup plan to use 450mm wafers to double the area per process step/wafer. since EUV worked, in ~2014, 450mm wafers programs across all equipment vendors stopped.
@MikkoRantalainen