SEMICONDUCTORS. Diode ratings and construction . SEMICONDUCTORS. Diodes have two active electrodes between which the signal of interest can flow The word diode comes from the Greek words meaning “two paths ” They are usually used for unidirectional current properties
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Diode ratings and construction
Germanium/Silicon diode V-I characteristics
The point which current will start to flow after the knee
Germanium/Silicon diode break down voltage
Diode symbol showing current flow (If)
The growth technique under an electron microscope
PN junctions can also be constructed using the alloyed method.
This is done by placing a small pellet of indium on N type semiconductor crystal and then it is heated until the pellet fuses with the crystal.
Since indium is trivalent impurity it produces a P type semiconductor.