Editing Semiconductors and the Architecture of the Logic Gate (section)

== <span style="color: #FFFFFF;">Remembering</span> ==
* '''Semiconductor''' — A material, typically a solid chemical element or compound, that can conduct electricity under some conditions but not others, making it a good medium for the control of electrical current.
* '''Silicon (Si)''' — The undisputed king of semiconductors. It is the second most abundant element in the Earth's crust (found in sand). It is cheap, highly stable at high temperatures, and naturally forms a flawless, protective oxide layer (Glass) when heated.
* '''Doping''' — Pure silicon is a terrible conductor. To make it useful, engineers "Dope" it by injecting a tiny amount of impurities into the perfect crystal. Injecting Phosphorus adds an extra, loose electron (N-Type). Injecting Boron creates an empty "hole" missing an electron (P-Type).
* '''The Transistor''' — The most important invention of the 20th century. A microscopic, solid-state switch built from layered N-Type and P-Type silicon. By applying a tiny voltage to the "Gate," you can instantly allow or block a massive current flowing from the "Source" to the "Drain."
* '''Binary Logic (1 and 0)''' — The result of the transistor. When the transistor lets electricity flow, the computer reads it as a "1". When it blocks the electricity, the computer reads it as a "0". String billions of these together, and you can play video games or simulate the universe.
* '''Moore’s Law''' — The relentless, terrifying economic and physical law of the industry, coined by Gordon Moore in 1965. It states that the number of transistors you can fit on a microchip doubles roughly every two years, leading to exponential increases in computing power and exponential decreases in cost.
* '''Photolithography''' — How chips are printed. You cannot use a physical brush to paint a transistor that is 3 nanometers wide. Engineers shine extreme ultraviolet (EUV) light through a massive, complex stencil (mask), shrinking the light through lenses to burn the microscopic circuit pattern onto a photosensitive silicon wafer.
* '''The Nanometer Node (e.g., 3nm)''' — The marketing term for the size of the transistor. The smaller the transistor, the faster the electron travels across it, and the less power it requires. Modern transistors are literally the width of a few dozen atoms.
* '''The Foundry (e.g., TSMC)''' — A massive, $20-billion mega-factory that actually prints the chips. Companies like Apple and Nvidia design the chips, but they do not manufacture them. They outsource the printing to "Foundries" like Taiwan Semiconductor Manufacturing Company (TSMC), the most strategically important corporation on Earth.
* '''Bandgap''' — The quantum physics gap between the electrons bound to the atom and the free-flowing electrons. Semiconductors have a moderate bandgap. Applying a voltage gives the electrons just enough energy to jump the gap and conduct electricity.
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