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- W6187185 abstract "This paper presents a comparative study, based on DC, RF and low frequency noise (LFN) measurements, between Carbon-doped, and Indium/Carbon doped GalnP/GaAs HBT's featuring different emitter widths. Both technologies exhibit an evident emitter size effect, while C-doped devices have larger DC and RF gains and a lower input voltage noise level. The better performance has been justified in terms of a higher quality of the extrinsic base surface. This explanation was supported by the LFN measurements carried out on self-aligned devices, which revealed an electron diffusion current from the emitter toward the base, probably due to the pinning of the Fermi level at the surface. The HBT's have been compared also in terms of reliability by means of electrical stress performed at room temperature. The effect, of the stress Was a DC current gain increase associated with a reduction of the base current and of the input voltage noise lorentzian component. The In/C doped devices exhibited the largest variations, and were more sensitive to the current stress." @default.
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- W6187185 date "1997-09-01" @default.
- W6187185 modified "2023-09-26" @default.
- W6187185 title "DC, RF and low frequency noise characterization of C and In/Cdoped GalnP/GaAs HBT's" @default.
- W6187185 hasPublicationYear "1997" @default.
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