STACK THE LAYERS
Build a PolyMUMPs chip
The real 14-step build: 7 deposited layers plus all 8 masking and etching steps in between. Tap each one in order — deposits grow the cross-section, masks get logged as they're etched.
CHALLENGE COMPLETE
🔬 You built a PolyMUMPs chip!
+40 XP
14 for 14 — perfect run.
The HF bath dissolved both PSG layers — Poly1 and Poly2 are now free-standing, suspended above the substrate.
The finished stack
The full 14-step process