The semiconductor industry designs, manufactures, and sells the microchips that power nearly every electronic device in modern life, from smartphones and laptops to cars, medical equipment, and data centers. It is one of the largest and most strategically important industries on the planet, with global annual revenue expected to surpass $1 trillion by 2030. Understanding this industry means understanding how a tiny sliver of silicon gets transformed into the brains behind almost everything electronic.
What Makes a Semiconductor Special
A semiconductor is a material that conducts electricity better than an insulator (like rubber) but worse than a true conductor (like copper). Silicon is the most widely used semiconductor material, though compounds like gallium arsenide serve specialized roles in high-frequency and optical applications. What makes these materials useful is a property called the band gap: an energy barrier that electrons must overcome to flow through the material and carry electrical current.
At extremely cold temperatures, a pure semiconductor acts like a perfect insulator because no electrons have enough energy to jump across that gap. At room temperature, some electrons gain enough thermal energy to cross over and conduct current. Engineers exploit this by adding tiny amounts of impurities to the silicon, a process called doping. Adding an element with one extra electron (a donor) makes the material more conductive. Adding one with fewer electrons (an acceptor) creates the opposite effect. By carefully controlling these impurities, manufacturers can build transistors, the microscopic on/off switches that form the basis of all digital logic.
How Chips Get Made
The semiconductor production process has three main stages: design, manufacturing (called the frontend), and assembly and testing (called the backend).
In the design phase, engineers use specialized software known as electronic design automation to lay out the architecture of a chip for a specific purpose, whether that’s running a phone’s operating system or training an AI model. The design is essentially a blueprint of billions of tiny circuit patterns.
Manufacturing is where those blueprints become physical circuits on a silicon wafer. The core technique is photolithography. A wafer is cleaned, heated to remove moisture, and coated with a light-sensitive chemical called photoresist. A mask containing the circuit pattern is placed over the wafer, and intense light shines through it. Where light hits the photoresist, a chemical reaction occurs, making those areas either dissolvable or resistant to a developer solution. After the developer washes away the unwanted material, the exposed pattern is etched into the silicon beneath. This cycle of coating, exposing, and etching repeats dozens of times to build up the many layers of a modern chip. Each completed wafer holds hundreds of identical chips.
In the backend stage, the wafer is sliced into individual chips (called dies), which are tested for defects, packaged into protective housings, and tested again before shipping to electronics manufacturers who solder them into finished products.
The Most Expensive Machines Ever Built
The most advanced chips today require extreme ultraviolet (EUV) lithography, a technology pioneered by the Dutch company ASML. EUV machines use light with a wavelength of just 13.5 nanometers to print circuit features far smaller than anything older lithography methods can achieve. Each EUV system costs roughly €150 million, and ASML sold only 53 of them in 2023. ASML relies on over 5,100 unique suppliers and spends more than €15.5 billion annually on components, making its supply chain one of the most complex in any industry.
ASML is the sole manufacturer of EUV machines, which means every company producing cutting-edge chips depends on a single supplier in the Netherlands. That concentration has made EUV lithography a focal point of geopolitical tension. China, anticipating export restrictions on these machines, ramped up purchases to represent 26% of ASML’s total sales in a recent year, up from a typical high-single-digit share.
Types of Chips the Industry Produces
Not all chips do the same job. The industry broadly divides its products into a few categories:
- Logic chips process information. Central processing units (CPUs) handle general-purpose computing, while graphics processing units (GPUs) specialize in parallel processing tasks like rendering video and, increasingly, training artificial intelligence.
- Memory chips store data. Volatile memory (RAM) holds information a processor needs in the moment but loses it when the device powers off. Non-volatile memory, like flash storage used in solid-state drives and USB drives, retains data without power.
- Analog and specialty chips manage real-world signals and specific functions. Application-specific integrated circuits (ASICs) are tailored for single tasks like processing payments, mining cryptocurrency, or managing power flow in a device.
Who Dominates the Industry
The five largest semiconductor companies by 2024 revenue illustrate the range of business models in the industry. Samsung led with $66.5 billion in revenue, driven by its dominance in DRAM and NAND memory. Intel followed at $49.2 billion as a major processor maker. NVIDIA reached $46 billion on the strength of its AI accelerators and graphics chips. SK hynix earned $42.8 billion, also fueled by memory demand tied to AI. Qualcomm rounded out the top five at $32.4 billion, leading in mobile chipsets and 5G wireless technology.
These companies operate under different models. Some, like Samsung and Intel, are integrated device manufacturers (IDMs) that both design and fabricate their own chips. Others, like NVIDIA and Qualcomm, are “fabless,” meaning they design chips but outsource production to foundries. The world’s largest foundry is Taiwan Semiconductor Manufacturing Company (TSMC), which fabricates chips for dozens of companies and controls the leading edge of manufacturing technology.
The Race to Smaller Transistors
Chip performance improves largely by shrinking transistors so more of them fit on each chip, while consuming less power. The industry measures progress in “nodes,” named in nanometers though the numbers no longer correspond to a literal physical measurement. TSMC became the first foundry to move 3-nanometer technology into high-volume production in 2022. Its 2-nanometer process, featuring a new transistor design called nanosheet architecture, entered volume production in the fourth quarter of 2025. An enhanced version called N2P is scheduled for the second half of 2026, promising further gains in performance and energy efficiency.
Each new node requires years of research, billions in capital investment, and entirely new generations of manufacturing equipment. Only three companies in the world (TSMC, Samsung, and Intel) are even attempting to manufacture at these leading-edge nodes, which is why the industry’s geographic concentration has become a national security concern for governments worldwide.
Why Governments Are Investing Billions
Semiconductors sit at the intersection of economic competitiveness and national security. Modern militaries, communications networks, and critical infrastructure all depend on chips, and the fact that the most advanced manufacturing is concentrated in East Asia, particularly Taiwan, has prompted Western governments to act.
The United States passed the CHIPS and Science Act in 2022, investing nearly $53 billion to bring semiconductor supply chains back to American soil. Within two years, the Commerce Department announced over $30 billion in proposed investments across 23 projects in 15 states, including 16 new manufacturing facilities expected to create more than 115,000 construction and manufacturing jobs. The European Union has pursued similar legislation to boost domestic chip production.
These investments reflect a broader recognition that whoever controls the semiconductor supply chain holds enormous leverage over the global economy. A single disruption, whether from a natural disaster, a pandemic, or a military conflict near key manufacturing hubs, can ripple through every industry that depends on chips. That reality has turned semiconductor policy from a niche industrial concern into a top-tier geopolitical issue.