Diode anode
In a semiconductor diode, the anode is the P-doped layer which initially supplies electrons to the junction. In the junction region, the electrons supplied by the anode combine with holes supplied from the N-doped region, creating a depleted zone. As the P-doped layer supplies electrons to the depleted region, positive dope ions are left behind in the P-doped layer ('P' for positive charge-carrier ions).
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