Moore's law

Small parts make computers work. A man named Gordon Moore saw something cool. He saw that more parts fit on a chip every two years. This makes tools like phones much better. Long ago, computers were very big and heavy. Now, they can be small and fit in your hand. This happens because the parts get smaller and smaller. It helps us make new things every day. Computers keep getting faster and better.

Gordon Moore was a leader at Intel. In 1965, he made a smart guess. He saw that more parts fit on a chip every year. These tiny parts are called transistors. In 1975, he changed his guess. He said the number of transistors would double every two years. This idea is now called Moore's law.

It is not a real law of physics. It is an observation of how things grow. This growth helps make tools like phones better. Old computers were very big and heavy. Modern phones are small and very fast. This happens because transistors get much smaller. This allows more of them to fit on one chip. Making these chips is getting harder now. The speed of growth has slowed down since 2010. Some experts think Moore's law might even be dead. Other experts think it will keep going. Making the tools to build chips is also getting very costly. This cost doubles every four years.

Moore's law is a famous observation about how technology grows. It describes how the number of transistors on a tiny computer chip doubles about every two years. Transistors are the small parts that help a chip do work. This idea is not a law of physics like gravity. Instead, it is an empirical relationship. This means it is an observation based on what people see happening in the real world. This steady growth helps make our digital world better every day.

How does this growth work? It happens because engineers find ways to make transistors much smaller. When they are smaller, more of them can fit on a single integrated circuit. An integrated circuit is a tiny chip that holds many parts. As these parts shrink, the chip can do more things at once. This process helps computers become more powerful without getting much larger.

It also helps make devices like digital cameras have more and better pixels.

Gordon Moore first shared his ideas in 1965. At that time, he worked at a company called Fairchild Semiconductor. He wrote a short article about cramming more parts onto chips. He first thought the number of parts would double every year. Later, in 1975, he updated his guess. He predicted the doubling would happen every two years instead.

His prediction has stayed true for many decades. This helped the whole industry plan for the future.

Many important inventions helped keep this trend going. In 1958, Jack Kilby invented the germanium integrated circuit. Soon after, Robert Noyce created the silicon version. Other scientists like Robert H. Dennard helped with memory and power. In the 1980s, researchers at IBM created special light-sensitive materials. These tools allowed makers to build even smaller and more complex chips.

These breakthroughs allowed transistor counts to grow by huge amounts.

You can see the results of this law in your own home. Think about a very old, heavy computer from the 1980s. Now think about a modern smartphone that fits in your hand. The smartphone is much faster and much smaller. This is because it has millions more tiny parts inside. Even though growth has slowed since 2010, technology still changes our lives. Making these chips is now very expensive, which is sometimes called Moore's second law.

Moore's law is a famous observation about the rapid growth of computing power. It is not a law of physics like gravity. Instead, it is an empirical relationship. This means it is a pattern observed from real-world data. The observation states that the number of transistors on an integrated circuit doubles approximately every two years. An integrated circuit, or IC, is a tiny semiconductor chip that holds many electronic parts. Transistors are the microscopic switches that allow these chips to process information. This steady doubling has driven massive technological and social changes for decades.

This growth happens through a process of shrinking components. Engineers find ways to reduce the physical size of transistors. When transistors are smaller, more of them can fit onto a single chip. This increases the circuit density. As density increases, the chip can perform more complex calculations. This process is often supported by Dennard scaling. This principle states that as transistors get smaller, their power density stays constant. This means the power used remains in proportion to the area of the chip.

This allowed chips to become more powerful without using too much extra energy.

There are several key technological drivers that have sustained this trend. The invention of the integrated circuit was the first major step. Jack Kilby created a germanium version in 1958. Shortly after, Robert Noyce invented the silicon monolithic IC. Later, the development of Complementary metal–oxide–semiconductor (CMOS) technology helped manage power. In the 1980s, researchers at IBM introduced chemically amplified photoresist. This material was much more sensitive to ultraviolet light. This allowed for much finer and more precise manufacturing.

These innovations allowed transistor counts to grow by more than seven orders of magnitude.

Gordon Moore first shared his ideas in 1965. At the time, he was the director of research and development at Fairchild Semiconductor. He wrote an article titled "Cramming more components onto integrated circuits." In that article, he predicted that component counts would double every year. In 1975, he revised this forecast. He predicted that the doubling would happen every two years instead. This revision became the standard version of Moore's law.

His prediction was so accurate that it became a goal for the entire industry.

We can see the impact of this law by comparing different generations of technology. An Osborne Executive computer from 1982 is a great example. It was a portable computer, but it was very heavy and large. It used a processor with a clock frequency of only 4 MHz. In contrast, a modern smartphone is much smaller and lighter. A smartphone can have a processor running at 412 MHz or much higher. The smartphone has vastly more transistors and much higher processing power. This shows how much more we can do with smaller, more efficient tools.

While the number of transistors grows, the cost to make them changes. This leads to what is known as Moore's second law, or Rock's law. This law states that the capital cost of a semiconductor fabrication plant increases exponentially over time. While consumers get more power for less money, the producers face rising costs. The tools used to make chips, such as extreme ultraviolet lithography (EUVL), are incredibly expensive. In fact, the cost of these manufacturing tools doubles roughly every four years. This makes staying ahead of the curve a massive financial challenge.

Today, many experts wonder if Moore's law is coming to an end. Microprocessor architects report that semiconductor advancement has slowed since around 2010. This means the pace of growth is slightly below the original prediction. Some leaders, like Nvidia CEO Jensen Huang, have suggested the law is dead. Others, like Intel's Pat Gelsinger, disagree. Despite these debates, companies like TSMC and Samsung continue to produce advanced chips. They use very small "nodes," such as 5 nm or 7 nm, to keep pushing the limits of what is possible.