THE CMOS PROCESS FLOW
Put the steps in order
Three stretches of the back-end and design flow: building a contact, building one metal layer, and turning a logic design into tapeout-ready masks. Each has steps that only work in one order. Tap them in sequence.
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CHALLENGE COMPLETE
🏗️ A flow, built in order
+50 XP
Every layer needs a flat surface before the next one starts, and every mask has to be verified before it's cut: skip ahead, and the layer above has nothing solid to build on.