Etching small patterns in Glass @HuygensOptics

Huygens Optics | Etching small patterns in Glass @HuygensOptics | Uploaded February 2021 | Updated October 2024, 1 hour ago.
Contents:
0:00 Intro
1:00 On the risks of Hydrofluoric Acid
4:56 Buffered Oxide Etch (BOE)
6:06 Glass protection with Photoresist
7:17 Glass protection with Chromium
9:12 Laser Induced Etching (LIE, LIDE)
12:20 Smallest Tesla valves in the World. No, Universe! (As far as I can tell).

This video contains an overview of some glass etching experiments I did with Buffered Oxide Etch (HF / NH4F). Just for the record: the video is not meant as an encouragement to start experimenting with concentrated HF yourself. If the info in this video did not scare you off, please study the following webpage before proceeding. (Warning: page contains unpleasant graphics):
emsworld.com/article/173379/hydrofluoric-acid-what-you-need-know

The video contains some images and clips taken from third party webpages and other Youtube channels. Please visit these to refer to the original content by clicking the links below. Did I forget anything? please let me know and I will set it straight.

functions of calcium in cells:
cell.com/fulltext/S0092-8674(07)01531-0

function of Calcium in the nerve system:
basicmedicalkey.com/introduction-to-central-nervous-system-pharmacology

Images of Crystal structures:
quartzpage.de
britannica.com/topic/glass-properties-composition-and-industrial-production-234890/Glass-formation

The delivery guy was taken from :
freepik.com

I deliberately did not discuss the way Tesla valves work, but these videos do (or demo its principle, short clips were used):
NightHawkInLight: youtube.com/watch?v=tcV1EYSUQME
The Thought Emporium: youtube.com/watch?v=eNBg_1GPuH0
The Action Lab: youtube.com/watch?v=sxvIQMnKhIg
Kasper Keizer: youtube.com/watch?v=G8YseaN3MrE
Integza: youtube.com/watch?v=ct0tljBtjG0

In the video I made referrals to Lightfab and LPKF / Vitrion. I do not have any commercial ties with these companies. If the part on "laser induced etching" got you interested in their products, please visit their respective websites:
lightfab.de
lpkf.com/en/industries-technologies/thin-glass-precision-processing-lide
vitrion.com/en/lide-technology

a small clip of the following lightfab video was used:
youtube.com/watch?v=wwWxDzA7OGU

For an overview of AZ-photoresists you can refer to the following page:
microchemicals.com/products/photoresists.html

The article below contains some good information on surface roughness introduced by etching
osapublishing.org/oe/fulltext.cfm?uri=oe-27-8-10705&id=408193

Bathroom Quantum Fields and Vacuum Energy

Foucault test of 400 mm diameter spherical mirror (short video)

Optical Interferometry Part 1: Introduction & ZYGO GPI layout

$Optical Interferometry Part 2: Measuring Optics with a Zygo GPI LC This is the second video on optical interferometry, which is dedicated to measuring the wavefront shapes of a mirror, 2 lens assemblies and 3 microscope objectives. Contents: 00:00 Intro 02:04 Video camera upgrade 04:23 DFT-fringe software 06:57 Transmission Sphere reference calibration 12:29 Shape of a Zerodur Perkin Elmer wafer stepper mirror 14:55 Wavefront deformation of a Canon FD f/1.2 camera lens (1980) 18:10 Wavefront test of a modern Canon EF 24-105mm f/4 zoom lens 19:19 Microscope objective testing 22:44 Nikon Plan Fluor 10x / 0.30 23:17 Leica Fluotar 20x / 0.50 25:23 Nikon Plan APO 20x / 0.75 Link to Optical Interferometry Part 1: https://www.youtube.com/watch?v=l32_QbcdUiw&t=614s Link to the video on measuring MTF: https://www.youtube.com/watch?v=1AzQ4y_qwrM DFTfringe forum page: https://groups.io/g/Interferometry/topics DFT fringe download: https://github.com/githubdoe/DFTFringe/releases Dale Eason on YouTube: https://www.youtube.com/@UCPj57WFSSLpVqPir7Im-kiw lens config Canon F1.2 By Jake Low - Own work, CC BY-SA 4.0 (modified) https://commons.wikimedia.org/w/index.php?curid=75904563 Laser diffraction pattern By Wisky - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=15113998 Do you need to be referenced but I forgot to do that? Let me know and I will set it straight.$

Light & Coherence part 2: Spatial Coherence (and the Double Slit Experiment)

$Making Optical Logic Gates using Interference In this video I look into the idea of using optical interference to construct different kinds of logic gates, both from a conceptual- as well as from the practical perspective. Contents 0:00 Intro 2:15 Logic gate operation 3:36 Optical logic gates 4:45 Concept of a diffractive logic gate 7:52 Practical aspects (photolithography and etching) 8:46 Wave front observation method 9:20 Results 13:51 Possible applications Webpage with detailed and complete information on logic gates: http://www.ee.surrey.ac.uk/Projects/CAL/digital-logic/gatesfunc/index.html The diffractive patterns were made by using a home-brewed windows Zone plate app and then modifying them further with photoshop. The Zone Plate app can be downloaded from: http://www.huygensoptics.com/assets/zp_writer.zip For Windows 10 and for personal use only. Virus scanners and Windows will nag about it being a rare / unknown file and make installation sometimes difficult. Sorry about that. Install this app at your own risk. An overview article on various known optical logic gates can be found in this paper: https://www.hindawi.com/journals/aot/2014/275083/ However it does not contain any mention of the configuration described in this video The video contains references to detail videos on the following subjects: Photolithography: https://youtu.be/Lf-ev2Fop_k Chromium photomask etching: https://youtu.be/foMT8gLYxBY Other diffractive optics (photon sieves): https://youtu.be/TshYfYIxR9E Microscope viewing method: https://youtu.be/TshYfYIxR9E$

$Imaging at ASML A visit to ASML with a deep dive into diffraction and imaging: 0:00 Intro 3:14 How big big are chip patterns nowadays? 5:00 Arriving at ASML Veldhoven 5:50 Interview Sander Blok part 1 7:40 About diffraction and image formation 9:36 Fraunhofer (far field) interference / diffraction explained 11:15 Diffraction on photolithography masks 15:11 About critical dimension 17:27 Example of computational photolithography 19:23 Interview Sander Blok part 2 21:46 EUV is difficult... by the way, the frequency of the tin droplets apparently is 50.000 not 15.000 per second. Animations were made using a Phyton script for Nvidia cuda, which was supplied to me by https://www.youtube.com/@DiffractionLimited The script with instructions to install it can be downloaded from github: https://github.com/0x23/WaveSimulator2D Third party images / video: Sleepy guy: https://www.youtube.com/watch?v=bBqLCrIwHbA Source mask optimization: https://opg.optica.org/directpdfaccess/837c889c-5b88-4dcb-8bfbdda02863dd9a_441841/oe-28-22-33371.pdf If you cannot access the article, search for the title in google: Source mask optimization using the covariance matrix adaptation evolution strategy Royalty free music used: Road Trip - Slynk Sharp Edges - half.cool Floating - Early Birds All imagery inside the ASML manufacturing facilities is stock video material shown Courtesy of ASML and IBM. ASML YouTube Channel: https://www.youtube.com/@ASMLcompany Want to work at ASML?: https://www.asml.com/en/careers/find-your-job Into viewing wave simulations? Nils Berglund has a ton of them: https://www.youtube.com/playlist?list=PLAZp3rbgWLo3VO2rqVKyL1T6DUmnDAaEN Did I forget anyone? Please let me know and we will work it out.$ $Interferometer Interference This short video shows how the intensity distribution changes in a wave interferometer, when one of the mirrors is moved by 1/4 of a wavelength. A shift by 1/4 wavelength in the mirror position introduces a phase shift of 1/2 lambda (180 degrees phase shift) and introduces destructive interference in one of the wave return paths). You can see that destructive interference is actually about rerouting the intensity to somewhere else: in this case, the waves return in the direction of the wave source itself (located above the beam splitter), create a standing wave pattern between the incoming and outgoing waves. This wave simulation was made using the code supplied by @DiffractionLimited The image file for the simulation can be downloaded here: https://huygensoptics.com/2D_wave_sims/interferometer.png #short #light #physics #optics$