What Is a Semiconductor?

Why Chips Matter

Economic impact, geopolitics, and modern dependence on semiconductors

The $600 Billion Industry

The $600 Billion Industry

The global semiconductor industry generates over $600 billion in annual revenue and enables trillions of dollars in downstream electronics products. Chips are in everything:

  • Smartphones: ~15 chips per phone (processor, memory, modem, power management, sensors)
  • Cars: Modern vehicles contain 1,000–3,000 chips each
  • Data centers: AI training clusters use thousands of GPUs, each a marvel of semiconductor engineering
  • Medical devices: From pacemakers to MRI machines
  • Infrastructure: Power grids, telecom networks, satellites

Key Concept: The Multiplier Effect

Every $1 of semiconductor revenue enables roughly $10 of electronic systems revenue. Chips are the foundation of the entire digital economy.

Geopolitics of Chips

Geopolitics of Chips

Semiconductors have become a strategic national security asset. The supply chain is remarkably concentrated:

  • TSMC (Taiwan) manufactures ~90% of the world's most advanced chips
  • ASML (Netherlands) is the sole supplier of EUV lithography machines
  • U.S. companies dominate chip design (Apple, Nvidia, AMD, Qualcomm) and EDA tools
  • Japan & Germany supply critical chemicals and specialty equipment

This concentration creates vulnerability. The 2020–2023 chip shortage disrupted auto manufacturing, consumer electronics, and even military systems. Governments responded with massive investment:

  • U.S. CHIPS Act: $52 billion to boost domestic chip manufacturing
  • EU Chips Act: €43 billion investment target
  • China: Over $100 billion invested in semiconductor self-sufficiency

Analogy: The New Oil

Just as oil shaped 20th-century geopolitics, semiconductors are shaping 21st-century power dynamics. Control over chip manufacturing capability is now a matter of national security.

Knowledge Check

Knowledge Check

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What percentage of advanced chips does TSMC manufacture?