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Schottky barrier ?

by eusername
Tags: barrier, schottky
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Nov8-12, 06:18 AM
P: 1
hi all

something i cant understand in the schottky barrier diode
i know that when electrons move from semiconductor(n type) to metal a depletion region appears in the n side so potentail difference is created
so for electrons to move from S.c to metal they need to overcome this potential

the question is:
why the electrons to move from metal to sc ther have to overcome the barrier not the potential

i really have a problem to understand the meaning of barrier
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