[J-4-3] 0.25-µm-Emitter InP HBTs with a Passivation Ledge Structure N. Kashio1, K. Kurishima1, Y. K. Fukai1, M. Ida1, S. Yamahata1 (1.NTT Corp.) https://doi.org/10.7567/SSDM.2009.J-4-3