transistor
Let an agent explain how transistors work and their families, relay specifications, packages and applications from datasheets and references, describe history and manufacturing, and distinguish transistors from diodes and integrated circuits.
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 how transistors work and their families, relay specifications, packages and applications from datasheets and references, describe history and manufacturing, and distinguish transistors from diodes and integrated circuits.
A semiconductor device with three or more terminals that amplifies or switches electrical signals, invented at Bell Labs in 1947, in main families of bipolar junction transistors and field-effect transistors including MOSFETs, with variants such as phototransistors and light-emitting transistors, and packages such as small-outline transistor packages; transistors are the basic building block of modern electronics, with billions integrated on single chips and discrete parts used in power and signal circuits.
What it is for: Amplifying and switching electrical signals.
It can be explain operation and families; relay specifications and packages; describe manufacturing and scaling; distinguish from related devices.
Distinguishing features
Amplification and switching
Bipolar and field-effect families
Extreme miniaturisation
Foundation of digital electronics
What it looks like
A small three-legged component, or a surface-mount package, or microscopic structures on a chip.
Physical character
invention: 1947 year - Bell Labs
transistors per chip: over 100 billion count - largest chips
gate length: a few nm - advanced nodes
How it is recognised
Three-terminal semiconductor amplifier or switch
BJT, FET, MOSFET, phototransistor and packages
Diodes have two terminals; integrated circuits contain many transistors
Related models
is a kind of - in registry terms
is a kind of - in registry terms
is the building block of - in digital electronics
is contrasted with - a two-terminal device
In practice
Families and kinds
bipolar junction transistors
field-effect transistors including JFET and MOSFET
power transistors including IGBTs
phototransistors and light-emitting transistors
packages such as SOT-23 and SOT-223
transistors in integrated circuit series
Identifiers
JEDEC part numbering 2N series
Pro Electron part numbering BC series
Standards and regulation
JEDEC and IEC component standards
RoHS and materials rules
Export controls on advanced semiconductor technology
Failure modes and hazards
Thermal and electrical overstress
Electrostatic discharge damage
Confusing families and pinouts
Also called
+44
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 How transistors work.
Science.
Operation
Operation.
Operation
Operation.
- How do bipolar and field-effect transistors amplify and switch? definition
- Is the device a transistor, a diode or an integrated circuit? boundary
Families
Families and variants.
Families
Families.
- What families and variants exist, and how do they differ? definition
- Which entry fits the specific type? action
Use Design and application.
Practice.
Specs
Specifications.
Specs
Specs.
- How are transistors specified in datasheets, and how are packages chosen? provenance
- Which references are standard? provenance
Circuits
Circuits.
Circuits
Circuits.
- How are transistors used in amplifiers, switches and logic gates? provenance
- Which entry fits the specific circuit? action
Make Manufacturing and scaling.
Industry.
Fabrication
Fabrication.
Fabrication
Fabrication.
- How are transistors fabricated on silicon, and what do advanced nodes involve? provenance
- Which entry fits semiconductor fabrication? action
Scaling
Moore law and limits.
Scaling
Scaling.
- How has transistor scaling progressed, and what limits exist, with sources? provenance
- Which sources are cited? provenance
Context History and industry.
Context.
History
History.
History
History.
- How was the transistor invented and developed, from Bardeen, Brattain and Shockley to the MOSFET? provenance
- Which entry fits the history of electronics? action
Industry
Industry and policy.
Industry
Industry.
- How is the semiconductor industry structured, and what policy issues exist, with positions attributed? provenance
- Which entry fits semiconductor industry? action
What the second pass must settle
- Should MOSFET and BJT be separate primary entries?
- How should datasheet sources be linked?
- The registry entry has merged aliases naming packages and IC series; should they be split off?