Laser cutting Silicon Wafers

Video Description

Micromachining silicon with lasers (but no sharks)! Today we're exploring different properties and parameters involved with cutting silicon with a pulsed nanosecond laser 🥰 CONSIDER SUBSCRIBING 🥰 🔬Patreon if that's your jam: https://www.patreon.com/breakingtaps ☕Or buy me a coffee? https://www.buymeacoffee.com/Breakingtaps 📢Twitter: https://twitter.com/BreakingTaps 📷Instagram: https://instagram.com/breakingtaps 💻Discord: https://discord.gg/R45uCXcEv4 ==== Links ==== - Photon sieve design is from: Andersen, Geoff, and Drew Tullson. "Broadband antihole photon sieve telescope." Applied optics 46.18 (2007): 3706-3708. - Experimental watch oscillator is from: Thalmann, Etienne, et al. "Flexure pivot oscillator with intrinsically tuned isochronism." Journal of Mechanical Design 142.7 (2020): 075001. - Big watch flexure is from: https://www.thingiverse.com/thing:4534867 Some videos about nanosecond etching, cutting, drilling: - https://www.youtube.com/watch?v=otNkHfbmDhE - https://www.youtube.com/watch?v=WwO9FeDdBdc ==== Timeline ==== 0:00 Nanosecond laser 1:00 Why silicon? 1:46 Examples 2:32 Tip #1: Polished vs unpolished side 3:10 Tip #2: Focal length 4:00 Tip #3: Heat management 4:40 Confounding variables 5:23 My Best Recipe 5:43 Wobble 7:16 Cut geometry 8:12 Supported vs unsupported 8:57 How good is surface finish? 11:05 Taper in microholes 11:54 2.5D/3D engraving 12:05 Etching interference fringes and fingerprints 12:28 Metal? 12:57 Ultrafast sintering!