Surface recombination mechanism in graded-base InGaAs-InP HBTs
The surface recombination at extrinsic base region in graded-base InGaAs-InP heterostructure bipolar transistors (HBTs) is studied. The (NH4)(2)S treatment eliminates the surface recombination, seen from the size-independent current gain. The surface recombination currents of the self- and nonself-aligned HBTs have different behavior. The mechanism of it is discussed.
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