Semiconductors is a wide industry. These are the segments where the real decisions — and the real money — get made.
GPUs, custom ASICs, and NPUs purpose-built for training and running AI models. This segment has become the single largest growth driver in the industry, pulling in capital, talent, and manufacturing capacity faster than any other category — and reshaping the competitive order between Nvidia, AMD, and the hyperscalers building their own silicon.
How individual dies get stacked, connected, and packaged into a finished chip — now often the real bottleneck in AI hardware supply, ahead of raw wafer fabrication. Techniques like CoWoS, hybrid bonding, and chiplet interconnect standards (UCIe) are becoming as strategically important as the transistors themselves.
The contract manufacturers — led by TSMC, with Samsung and Intel Foundry chasing — that actually fabricate chips designed by other companies, and the relentless progression from 5nm to 3nm to 2nm and beyond. Foundry capacity and geography (Taiwan, Arizona, Japan, Germany) is now a matter of national industrial policy, not just business strategy.
DRAM, NAND flash, and — critically for AI — high-bandwidth memory (HBM) stacked directly alongside accelerator dies. Memory has become a supply-constrained input to the entire AI hardware stack, with HBM allocation now a bigger swing factor in accelerator output than logic wafer availability.
Power management, analog, and microcontroller chips that go into vehicles and industrial equipment rather than data centers. Slower-moving and more cyclical than AI silicon, but rising EV content per vehicle is quietly growing the addressable market even as traditional auto production stays flat.
Export controls, tariffs, and the multi-year effort to build semiconductor manufacturing capacity outside Taiwan and China. Nearly every major decision in this industry now runs through a geopolitical filter, from where fabs get built to which customers can legally buy the most advanced chips.
The machines and materials — lithography systems, etch and deposition tools, specialty chemicals and wafers — that make chip fabrication possible in the first place. A small number of companies, led by ASML in lithography, hold near-monopoly positions on tools the entire industry depends on.