Abstract
Planar GaInAsP/InP hetero-bipolar transistors (HBTs) applicable for integration into optoelectronic integrated circuits (OEICs) have been fabricated. Si and Mg ions have been implanted into an LPE-grown heterostructure on semi-insulating InP to form collector and base contacts. Emitter-up HBTs showed maximum current gains of up to 20000.

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