A History of Semiconductors : "Moore" Than You Think
Day 7 of a not-so-boring Semiconductor Industry Analysis
Today, I was amazed to learn that the calculator I was using is from a company that is a semiconductor giant, yet calculators contribute only 3% of its revenue. It was through this company that the era of modern chips began. (yayy dots are connecting) I feel truly fascinated and connected to history now. Here I am, reading some on the history of semiconductors, which started with bulky vacuum tubes and evolved into hair-thin transistors and microchips.
-Read along to know the company tho :)
I've tried learning about the evolution of semiconductors bit by bit, Here's a breakdown:
The Era of Vacuum Tubes (1904 - 1950s)
Imagine a time when computers were the size of entire rooms! Before microchips existed, electronics ran on vacuum tubes – big glass tubes that controlled electric current.
1904: John Ambrose Fleming invented the vacuum tube diode, which allowed electricity to flow in just one direction (think of it as an early version of a one-way street for electric signals).
1906: Lee De Forest introduced the triode vacuum tube, which could amplify electrical signals (like a microphone making a voice louder).
These tubes were used in early radios, televisions, and computers, but they had some serious problems:
Huge in size – Computers needed entire rooms to house them.
Overheated easily – They generated a ton of heat, requiring constant cooling.
Power guzzlers – They consumed a lot of energy.
Short lifespan – They burned out frequently and had to be replaced often.
Clearly, something better was needed…
The Birth of Cute little Semiconductors (1947 – 1950s)
Then came a breakthrough that changed everything. In 1947, three brilliant scientists at Bell Labs – John Bardeen, William Shockley, and Walter Brattain – invented the transistor, a tiny switch that could replace vacuum tubes.
Why were transistors a game-changer?
Much smaller – No more room-sized computers!
More reliable – They didn’t burn out like vacuum tubes.
Energy-efficient – Used far less power.
Faster – They could process data at incredible speeds.
For their groundbreaking work, these scientists won the Nobel Prize in Physics in 1956.
And fun fact – today’s smallest transistor is 50,000 times thinner than a human hair!
The Rise of Integrated Circuits (1958 - 1970s) – Packing More Power into Chips
Having a transistor was great, but computers still needed thousands of them to function. Enter integrated circuits (ICs) – a way to place multiple transistors onto a single silicon chip.
1958: Jack Kilby (Texas Instruments) and Robert Noyce (Fairchild Semiconductor) independently invented the integrated circuit, marking the birth of modern microchips.
When Kilby created the first IC, he had no idea it would one day power safer cars, smart water meters, pocket-sized ultrasound machines, and so many other everyday innovations.
P.S. If you’ve ever used a Texas Instruments calculator, you’re actually holding a piece of history – TI helped pioneer the very technology that makes modern chips possible!
🔹 1971: Intel introduced the 4004 microprocessor, which packed an entire computing system onto a single chip. This made personal computers (PCs) possible.
The 1980s & 1990s – The PC Boom & Supercharged Chips
As chip technology improved, engineers started shrinking transistors even more and cramming millions of them onto a single chip. This led to:
Very Large Scale Integration (VLSI) – Allowed thousands to millions of transistors on a chip, making computers way faster.
Microprocessors became mainstream – Intel, AMD, and Motorola developed powerful processors for PCs.
Graphics and memory chips improved – Making gaming, video editing, and data storage better than ever.
The 2000s – The Internet Age & Smartphones
Intel launched the Pentium processors (1993) – These became the backbone of personal computers. These processors introduced faster clock speeds, improved multitasking, and better graphics capabilities, making computers more powerful and accessible for everyday users. They became the foundation of modern PCs, enabling smoother performance for everything from gaming to business applications.
AMD challenged Intel – Competition led to cheaper, more powerful chips.
Mobile revolution (2000s) – Chips had to become even smaller and more power-efficient for smartphones and tablets.
And then came Moore’s Law, which changed everything.
Moore’s Law
In 1965, Gordon Moore (co-founder of Intel) predicted that the number of transistors on a chip would double every two years, making chips:
Smaller
Faster
Cheaper
For decades, this held true and fueled the explosion of powerful computers, smartphones, and AI.
But around 2010-2015, Moore’s Law started slowing down because:
Transistors got too small – At below 5 nanometers (nm), quantum effects like electron leakage caused problems.
Higher costs – Making chips this tiny became extremely expensive.
Heat issues – Shrinking chips didn’t always mean they performed better.
So, the industry had to adapt.
How Did the Industry Keep Up?
Instead of just making transistors smaller, companies started using new strategies:
Multi-core processors – Instead of one super-fast core, chips now have multiple cores (dual-core, quad-core, etc.) to handle tasks simultaneously.
P.S.: A simple explanation for dual-core, quad-core:
A dual-core processor has two cores, meaning it can handle two tasks at once, making things faster than a single-core processor. A quad-core processor has four cores, so it can juggle even more tasks smoothly, making it better for gaming, video editing, and heavy multitasking.
More cores = better performance for demanding tasks!
Specialized chips – Different types of processors were developed:
GPUs (Graphics Processing Units) – Originally for gaming, but now essential for AI and machine learning.
TPUs (Tensor Processing Units) – Created by Google for super-fast AI calculations.
NPUs (Neural Processing Units) – Found in smartphones, making AI-powered photography and voice recognition possible.
3D Chip Stacking – Instead of placing transistors side by side, companies started stacking layers to fit more power into a small space.
Now – AI & The Future of Semiconductors
NVIDIA leads in AI chips – GPUs are now used for AI, self-driving cars, and even healthcare.
TSMC (Taiwan Semiconductor Manufacturing Company) overtakes Intel – TSMC became the world’s most advanced chip manufacturer.
China ramps up chip production – Due to US trade restrictions, China started investing heavily in its own semiconductor industry.
Apple ditches Intel – Apple now makes its own M-series chips for MacBooks, offering better performance and battery life.
So all in all, From room-sized vacuum tubes to tiny AI-powered chips, the semiconductor industry has come a long way. Every device we use – from laptops and smartphones to gaming consoles and smart fridges – runs on these powerful chips.
And it’s quite interesting, I assumed I would be dreading while studying this all technical stuff, but it’s actually not that boring.
Next let’s explore the different kinds of semiconductor chips and their value chain.
Have a cute day ahead<3
-Abhishree