A high-speed and small-sized optical interconnection device uses wavelength-multiplexed
light suitable therefor in order to make compatible between an increase in high-speed
communication capacity of the optical interconnection device and an increase in
high-speed communication distance thereof. A signal processing LSI is placed within
a central portion of a main surface of a semiconductor substrate, and input/output
units for transmitting and receiving optical wavelength-multiplexed lights are
multi-chip integrated on the periphery of the main surface of the semiconductor
substrate into a single package, and a wiring length can be reduced and a physical
signal band for each connecting wiring can be enlarged. Further, the signal processing
LSI is made up of CMOS and a driver circuit for each optical transmitting/receiving
element is comprised of a SiGe transistor circuit, whereby a modulated
signal band can be enlarged and the performance of the input/output optical signals
from the device can be improved.
