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A InGaP/GaAs/InGaP composite collector double heterojunction bipolar transistor (DHBT) has been designed and fabricated to combine the advantages of single heterojunction bipolar transistor (SHBT) and conventional DHBT. The device has low collector–emitter offset voltage (∼60 mV) and knee voltage (≪1 V). The breakdown voltage of ∼14 V is as high as that of a conventional DHBT. Comparison was made with a GaAs homojunction bipolar transistor and InGaP/GaAs SHBT. Both homojunction transistor and composite collector DHBT show similar collector–emitter offset voltage dominated by the geometrical factor. The knee voltage of the composite collector DHBT is ∼0.15 V lower than that of the InGaP/GaAs SHBT. The results demonstrate the potential of composite collector DHBTs for practical power amplifier applications. © 2004 American Vacuum Society.
Published in:
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures
(Volume:22
,
Issue:
2
)
Date of Publication: Mar 2004
- Page(s):
- 579 - 582
- ISSN :
- 1071-1023
- Digital Object Identifier :
- 10.1116/1.1651107
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 18 June 2009
- Issue Date :
- Mar 2004
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