Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2003/10/01 Vol. E86-CNo. 10pp. 2004-2009 Type of Manuscript: Special Section PAPER (Special Issue on Heterostructure Microelectronics with TWHM2003) Category: Keyword: HBT, InGaP, GaAs, ledge, capacitor, base resistance, recombination,