The backward diode is a special form of tunnel diode in which the tunneling phenomenon is only incipient, and the negative resistance region virtually disappears.
2.
Since it has low capacitance and no charge storage effect, and a strongly nonlinear small-signal characteristic, the backward diode can be used as a detector up to 40 GHz.
3.
In semiconductor devices, a "'backward diode "'( also called "'back diode "') is a variation on a Zener diode or tunnel diode having a better conduction for small reverse biases ( for example 0.1 to 0.6 V ) than for forward bias voltages.
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