SiGe HBT and BiCMOS technologies for optical transmission and wireless communication systems

Katsuyoshi Washio

Research output: Contribution to journalArticlepeer-review

63 Citations (Scopus)


Technologies for a self-aligned SiGe heterojunction bipolar transistor (HBT) and SiGe HBTs with CMOS transistors (SiGe BiCMOS) have been developed for use in optical transmission and wireless communication systems. n Si cap/SiGe-base multilayer fabricated by selective epitaxial growth (SEG) was used to obtain both high-speed and low-power performance for the SiGe HBTs. The process except the SEG is almost completely compatible with well-established Si bipolar-CMOS technology, and the SiGe HBT and BiCMOS were fabricated on a 200-mm wafer line. High-quality passive elements, i.e., high-precision poly-Si resistors, a high-Q varactor, an MIM capacitor, and high-Q spiral inductors have also been developed to meet the demand for integration of the sophisticated functions. A cutoff frequency of 130 GHz, a maximum oscillation frequency of 180 GHz, and an ECL gate-delay time of 5.3 ps have been demonstrated for the SiGe HBTs. An IC chipset for 40-Gb/s optical-fiber links, a single-chip 10-Gb/s transceiver large-scale IC (LSI), a 5.8-GHz electronic toll collection transceiver IC, and other practical circuits have been implemented by applying the SiGe HBT or BiCMOS technique.

Original languageEnglish
Pages (from-to)656-668
Number of pages13
JournalIEEE Transactions on Electron Devices
Issue number3
Publication statusPublished - 2003 Mar
Externally publishedYes


  • BiCMOS integrated circuits
  • Bipolar transistors
  • Emitter coupled logic
  • Epitaxial growth
  • Heterojunctions
  • High-speed integrated circuits
  • MIMICs
  • Millimeter-wave bipolar integrated circuits
  • Monolithic microwave integrated circuits (MMICs)
  • Optical communication

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


Dive into the research topics of 'SiGe HBT and BiCMOS technologies for optical transmission and wireless communication systems'. Together they form a unique fingerprint.

Cite this