# die

> naked single chip, microchip or semiconductor chip - e.g. transistor chip - or IC chip.

**Wikidata**: [Q1072430](https://www.wikidata.org/wiki/Q1072430)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Die_(integrated_circuit))  
**Source**: https://4ort.xyz/entity/die

## Summary
A die is the tiny, unpackaged rectangle of semiconductor material—usually silicon—that contains the actual transistors and wiring of an integrated circuit. It is the functional heart of every chip, cut from a processed wafer and later packaged into the familiar black plastic or ceramic body you see on a circuit board.

## Key Facts
- Part of: integrated circuit (the die is placed inside the protective package)
- Instance of: electronic component
- Materials used: silicon, semiconductor substrates
- Aliases: IC die, semiconductor die, CPU die, naked chip, 裸晶, puce, dé
- Commons category: Integrated circuit dies
- Wikidata sitelinks: 25 language editions
- GND ID: 4197163-2
- Freebase ID: /m/026bcl6
- Different from: Die (singular of dice)
- Image example: Unisys SCAMP mainframe processor die (commons file Unisys_SCAMP_die.jpg)

## FAQs
### Q: Is a die the same as a microchip?
A: No. A microchip (or integrated-circuit package) includes the die plus a protective housing and metal leads; the die itself is the bare, unpackaged slice of silicon.

### Q: Why is it called a “die”?
A: The word comes from the same root as “die-cast”: each rectangular piece is “cast” or cut from a larger wafer, yielding many identical dice.

### Q: How big is a typical die?
A: Sizes vary by device, but they are usually a few millimetres on a side—small enough that dozens to thousands fit on a single 200 mm or 300 mm wafer.

## Why It Matters
Every electronic product that computes, stores, or switches relies on at least one die. Shrinking the patterns on the die—measured in nanometres—has driven Moore’s-law gains in speed, cost, and energy efficiency for half a century. Without the die, the packaged “chip” would be an empty shell; without advanced dies, smartphones, data centres, and power electronics would not exist in their current form. Understanding dies clarifies why foundries invest billions in wafer fabs: the die is where transistors are actually built, so every performance or yield improvement multiplies across millions of future products.

## Notable For
- Functional core: every transistor, capacitor, and interconnect of an IC is fabricated on the die; the package only protects and connects it.
- Bare form factor: unlike packaged chips, dies are handled only in cleanrooms because even microscopic dust can short their fine structures.
- Multi-die systems: high-performance processors now combine several dice (chiplets) in one package, pushing the concept beyond a single slice.
- Linguistic quirk: the plural “dice” is standard in the semiconductor industry, distinguishing these components from gaming dice.

## Body
### Physical form
A die begins as a thin wafer of monocrystalline silicon. Photolithography, etch, deposition, and implant steps build up transistor layers; the wafer is then sawn into rectangular dice. Each die is typically 0.1–2 mm thick and anywhere from under 1 mm² (simple sensors) to > 800 mm² (high-end CPUs/GPUs) in area.

### Relationship to packaged IC
After electrical test, good dice are bonded to a lead-frame or substrate, connected with gold or copper wires, and encapsulated in epoxy, ceramic, or metal. The resulting package provides mechanical support, heat spreading, and standardized pins for board assembly.

### Use in CPUs and power devices
Central processing units mount one or more high-performance dice; power-semiconductor modules may contain several large dice in parallel to handle high current. Thus “die” appears in both low-power mobile chips and multi-kilowatt converters.

## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)