From the Machine to the Atom

The machine

$380 million

the price of one, from the only company on Earth that makes it

The most complicated machine ever built

Made by one company, ASML, in the Netherlands. Its light is born when a laser strikes 50,000 droplets of molten tin a second.

The wafer

300 mm

one disc, sliced from a single crystal of silicon

A mirror grown from melted sand

A 300 mm disc sliced from one crystal grown out of melted, purified sand, refined to about 99.9999999% pure. Hundreds of chips are printed across it at once.

The chip

~100,000,000,000

transistors, on a die the size of a fingernail

One chip, cut from the wafer

A single die. The newest carry tens of billions of transistors, each flicking on and off billions of times a second, ringed by thousands of contacts to the outside world.

The wiring

tens of km

of copper, folded into one fingernail of silicon

A city of copper in stacked floors

No camera can follow past the surface, so from here we compute it. Copper in more than a dozen stacked layers; unspooled, the wires in one chip run for tens of kilometers.

The transistor

86,000,000,000

neurons in your brain, and a top chip now rivals the count

The switch, smaller than a virus

One transistor, a few dozen nanometers across. A chip packs about 100 billion; your brain holds 86 billion neurons, though its ~100 trillion connections still dwarf anything we print.

The atom

0.5 nm

across one cell of the silicon crystal

Where the picture ends and the atoms begin

The silicon crystal: atoms in a lattice that repeats about every half a nanometer. This is the floor. The whole $380 million machine exists to place these dots, a few atoms at a time.

The ASML High-NA EUV lithography machine: a wall of stainless-steel modules and vacuum chambers in a cleanroom, with technicians for scale.

The machine

$380 million

the price of one, from the only company on Earth that makes it

The most complicated machine ever built

Every advanced chip is printed by one kind of machine, made by one company, ASML. A High-NA EUV system costs around $380 million and makes its light by firing a laser at 50,000 droplets of molten tin a second.

A silicon wafer, its surface a grid of identical chips.

The wafer

300 mm

one disc, sliced from a single crystal of silicon

A mirror grown from melted sand

The machine prints onto a 300 mm disc of silicon, refined to about 99.9999999% pure, patterned with hundreds of identical chips at once.

A macro photograph of a processor die, a golden microscopic landscape of repeating structure.

The chip

~100,000,000,000

transistors, on a die the size of a fingernail

One chip, cut from the wafer

A single die carries tens of billions of transistors, with thousands of contacts to the outside world around its rim.

The wiring

tens of km

of copper, folded into one fingernail of silicon

A city of copper in stacked floors

Below the resolution of light, no photograph can follow. Between the contacts and the switches runs the wiring: copper threads in more than a dozen stacked layers. Unspooled, the wires in one chip would run for tens of kilometers.

The transistor

86,000,000,000

neurons in your brain, and a top chip now rivals the count

The switch, smaller than a virus

One transistor is a few dozen nanometers across. A chip packs around 100 billion; your brain holds about 86 billion neurons, though its ~100 trillion connections still dwarf anything we print.

The atom

0.5 nm

across one cell of the silicon crystal

Where the picture ends and the atoms begin

At the floor is the silicon crystal, atoms in a lattice that repeats about every half a nanometer. The whole $380 million machine exists to place these dots, a few atoms at a time, a hundred billion times over.

Start at a machine the size of a bus and end at a dot half a nanometer wide, and you have crossed about ten powers of ten without ever leaving one object.

That is the strange thing about a chip. It is the only place where the largest engineering effort humans have ever mounted and the smallest thing we can deliberately arrange meet in the same breath. A $380 million machine, a disc of nine-nines sand, a fingernail of a hundred billion switches, and underneath it all, atoms in a quiet lattice, waiting to be told what to do.

Machine photo courtesy of Intel (High-NA EUV). Wafer by Mister rf, CC BY-SA 4.0. Die by Fritzchens Fritz, CC0. The wiring, transistor, and silicon lattice are drawn in code; below the wavelength of light, no camera can go.