ALGAAS/GAAS HETERO-JUNCTION BIPOLAR TR. AND ITS MAKING METHOD
The method reduces the surface recombination of base current by forming a guiding layer of a precise thickness. The method comprises the steps of: forming an emitter mesa struture of n+-type GaAs layer on the n--type AlGaAs layer; forming a base mesa structure of p+-type GaAs layer on the n--type Ga...
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Zusammenfassung: | The method reduces the surface recombination of base current by forming a guiding layer of a precise thickness. The method comprises the steps of: forming an emitter mesa struture of n+-type GaAs layer on the n--type AlGaAs layer; forming a base mesa structure of p+-type GaAs layer on the n--type GaAs layer; and including an AlGaAs guiding layer (12) which is formed by the implantation of aluminum into the surface of the base mesa structure. |
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