Electronics Semiconductors
A semiconductor is a material with electrical conductivity between that of a conductor and an
insulator, allowing its conductivity to be controlled. This property makes them the foundation
for modern electronics like diodes, transistors, and integrated circuits, found in everything
from smartphones to medical equipment. Common examples include silicon, germanium, and gallium
arsenide.
Key properties
Intermediate conductivity: Semiconductors fall between conductors (like copper) and insulators
(like
rubber), meaning they conduct electricity under certain conditions but can also act as
insulators.
Controlled current: Their conductivity can be precisely controlled by introducing impurities
(doping) or by applying external stimuli like voltage, light, or temperature.
Foundation of electronic switches: They act as tiny, controllable electrical switches, turning
current on and off, which is fundamental to digital technology.
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