Depletion Region
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PHYSICS
Semiconductor Physics
Depletion Region
Depletion region forms an insulating barrier critical to semiconductor device function
1 Feb 2026
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What is the primary reason the depletion region acts as an insulating barrier in a semiconductor device?
Because the depletion region contains an excess of free electrons that block current flow
Because the depletion region is made of a different material that is inherently non-conductive
Because mobile charge carriers are depleted, leaving only fixed ionized impurities that do not conduct current
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