⚡Semiconductors: from band theory to modern chips

A six-lesson path from the physics of silicon to the global chip industry. Start with bands, doping, and the PN junction; build up through diodes and transistors to CMOS gates; then walk the wafer through a fab, decode '5 nm' marketing, and trace how Dennard scaling died and chiplets carry Moore's law forward. By the end you can read a chip datasheet, follow a TSMC roadmap, and explain why every modern SoC is half-dark.