Logic ICs

A chip is a tiny wafer of silicon carrying millions or billions of the smallest electrical switches. Such chips come in different types, depending on what task they perform. Logic ICs are the kind that computes: they combine electrical signals according to fixed rules and derive new signals from them. The abbreviation IC stands for “integrated circuit” – many switches packed together on a single wafer. A processor in a phone or laptop is a logic IC, as is a graphics chip. The most important distinction is the one from memory chips: memory chips remember data, logic ICs process it.

Why Nvidia, TSMC, and Intel depend on these chips

Almost everything that appears in business news today as the AI boom is, at its core, demand for logic ICs. Training a large language model means carrying out an unimaginable number of computational operations. These operations happen on logic chips, mostly on graphics processors. Whoever builds or manufactures such chips earns money from every new data center.

This also explains the political dimension. The most advanced logic ICs are made in only a few factories worldwide, a large share of them in Taiwan at the company TSMC. The United States has restricted the export of particularly powerful AI chips to China. Chips have thus become a tool of trade-policy leverage, much like oil was for decades.

The semiconductor market is often divided into categories in statistics: logic, memory, analog chips, and a few smaller groups. Logic is the category with the highest revenue and the fastest growth. When a report speaks of “record demand for semiconductors,” it is almost always the logic segment behind it.

From transistors to computational steps

The basic building blocks of a logic IC are transistors, tiny electrical switches with no moving parts. A transistor knows two states: current flows or current does not flow. This corresponds to the digits 1 and 0. Multiple transistors are used to build gates, which implement simple rules. An AND gate, for example, outputs a 1 only when both inputs deliver a 1.

All computational operations can be assembled from such gates. Adding two numbers is nothing more than a clever wiring together of many gates. Stack enough of these together, and you get a processor that can execute programs. Modern logic chips contain more than a hundred billion transistors on an area smaller than a thumbnail.

That is why the industry constantly talks about feature sizes like “3 nanometers.” The smaller the transistors, the more fit on a chip and the less power they need. A common misconception is that this nanometer figure measures an actual length. Today it is more of a marketing name for a manufacturing generation.

Where logic chips are found

In everyday life, everyone encounters logic ICs daily, mostly invisibly. A smartphone contains a main processor, plus a graphics unit and often a dedicated computing unit for AI functions like facial recognition. A modern car contains several hundred chips depending on its equipment, many of them logic devices for brakes, engine control, and driver-assistance systems. That is exactly why car factories stood still in 2021 when chip deliveries stalled.

In the news, the term mostly comes up in quarterly earnings reports and location debates. When new chip factories in Germany or the United States are reported on, it is almost always about logic manufacturing, because it is technically the most demanding. Nvidia’s data center division also falls into this category. Anyone trying to make sense of such reports should above all ask one question: are these chips that compute, or chips that store? The two markets behave completely differently.