semiconductor
Let an agent explain semiconductors and their physics, relay materials, doping, devices and industry from physics and engineering sources, describe the forms the registry aliases name, and distinguish semiconductors as materials from semiconductor devices, from the chip industry and from superconductors.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain semiconductors and their physics, relay materials, doping, devices and industry from physics and engineering sources, describe the forms the registry aliases name, and distinguish semiconductors as materials from semiconductor devices, from the chip industry and from superconductors.
A material with electrical conductivity between that of a conductor and an insulator, which can be controlled by doping, temperature, light or applied fields, including crystalline silicon and germanium, compound semiconductors such as gallium arsenide, amorphous silicon used in thin-film devices, semiconducting polymers, stretchable semiconductors for flexible electronics, and semiconductor nanocrystals or quantum dots; intrinsic semiconductors are pure and extrinsic ones are doped, and semiconductors are the basis of transistors, integrated circuits, solar cells and LEDs.
What it is for: Making electronic and optoelectronic devices.
It can be explain the physics; relay materials and devices; describe forms; distinguish related concepts.
Distinguishing features
Band gap
Doping control
Many material forms
Device basis
What it looks like
Grey crystalline solids such as silicon wafers, or thin films and polymers.
Physical character
silicon band gap: 1.12 eV - at 300 K
gallium arsenide band gap: 1.42 eV
transistor invented: 1947 year - Bell Labs
quantum dot size: about 2-10 nm
How it is recognised
Material with controllable conductivity
Silicon, gallium arsenide, amorphous silicon, semiconducting polymer, quantum dot, extrinsic semiconductor
Devices are made from the material; the industry makes chips; superconductors have zero resistance
Related models
is a kind of - in registry terms
is a kind of - partially, in registry terms
is used in - and integrated circuits
is contrasted with - and conductor
In practice
Families and kinds
elemental semiconductors silicon and germanium
compound semiconductors such as GaAs and GaN
amorphous and polycrystalline silicon
organic and polymer semiconductors
stretchable semiconductors
semiconductor nanocrystals and quantum dots
intrinsic and extrinsic semiconductors
Standards and regulation
SEMI industry standards
Export controls on advanced semiconductor technology
Chemical safety rules in fabrication
Failure modes and hazards
Confusing material with device or industry
Registry aliases mixing materials, forms and nanostructures
Partisan framing of chip geopolitics
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What a semiconductor is.
Science.
Definition
Definition.
Definition
Definition.
- What is a semiconductor, and how does it differ from devices, the chip industry and superconductors? definition
- Is the question about physics, a material, a device, manufacturing or policy? boundary
Forms
Forms.
Forms
Forms.
- What are crystalline, amorphous, polymer, stretchable and nanocrystal semiconductors, and intrinsic versus extrinsic? definition
- Which entry fits the specific form? action
Physics Physics.
Science.
Bands
Band theory.
Bands
Bands.
- How do band gaps, carriers and doping explain semiconductor behaviour? provenance
- Which references are standard? provenance
Junctions
Junctions.
Junctions
Junctions.
- How do p-n junctions and heterostructures work? provenance
- Which sources are cited? provenance
Technology Devices and industry.
Application.
Devices
Devices.
Devices
Devices.
- How are transistors, solar cells, LEDs and lasers built from semiconductors? provenance
- Which entry fits the specific device? action
Industry
Industry.
Industry
Industry.
- How are semiconductors manufactured, and how is the industry structured, with policy debates attributed? provenance
- Which entry fits semiconductor industry? action
Context Frontiers and history.
Context.
Frontiers
Frontiers.
Frontiers
Frontiers.
- What are quantum dots, 2D semiconductors and flexible electronics? provenance
- Which entry fits quantum dot? action
History
History.
History
History.
- How did semiconductor science develop from early rectifiers to the transistor and integrated circuit? provenance
- Which entry fits the history of the transistor? action
What the second pass must settle
- Should quantum dot and organic semiconductor be separate primary entries?
- How should physics and engineering sources be linked?
- The registry entry has merged aliases naming forms and nanostructures; should they be split off?