Moore's Law, Fabrication Costs, and Industry Consolidation

Key Insight

The relentless progression of Moore's Law, which dictates the shrinking of transistors, drove significant performance improvements in logic and memory chips but also dramatically increased the cost and complexity of semiconductor fabrication. Each new generation of technological improvement made fabs substantially more expensive, with advanced logic or DRAM fabs costing upwards of $20 billion by the 2000s. By the early 2010s, two-dimensional scaling of transistors faced physical limits, as shrinking them further led to issues like power 'leakage' and quantum effects such as 'tunneling' through the increasingly thin silicon dioxide layers, threatening transistor performance and the continuation of Moore's Law.

To overcome these physical barriers, new materials and transistor designs became imperative. The 22-nanometer node introduced the three-dimensional FinFET transistor, which improved control over electron movement by applying electric fields from multiple sides, effectively combating electricity leakage. However, these nanometer-scale 3D structures were staggeringly difficult to manufacture, demanding unprecedented precision in deposition, etching, and lithography. This continuous need for cutting-edge, complex machinery and processes meant that only companies with immense capital could keep pace with the biannual node transitions required for leading-edge chips, leading to intense competition.

The financial demands of leading-edge fabrication resulted in significant industry consolidation. Once numbering dozens, DRAM producers dwindled to just three major firms globally, with advanced fab construction reaching $20 billion. Similarly, the number of companies capable of fabricating advanced logic chips relentlessly shrunk. Even large entities like GlobalFoundries, which inherited AMD's fabs and acquired others, eventually retreated from the race to produce the smallest transistors. After investing $1.5 billion in 7-nanometer process development, GlobalFoundries canceled its EUV program in 2018, concluding that, as a medium-sized foundry, it could not make leading-edge processes financially viable. This left only three companies—TSMC, Samsung, and Intel—with the financial and technological capacity to pursue the most advanced chipmaking, further centralizing control of critical manufacturing.