Patent ID: 6977423

Claim:
A light-receiving assembly comprising: a light-receiving module for converting an optical signal to an electrical signal, comprises; a semiconductor light-receiving device for converting an optical signal to an electrical signal; a first lead terminal for outputting the electrical signal converted by the semiconductor light-receiving device; a second lead terminal for providing an power supply to the semiconductor light-receiving device; and a metal body for mounting the semiconductor light-receiving device thereon, the metal body providing a plurality of through holes having an inner surface for passing the first lead terminal and the second lead terminal, the light-receiving module is sealed by filling up a sealant only in an opening between the first lead terminal and the inner surface of the through hole and between the second terminal and the inner surface of the through hole, and a substrate having a transmission line for transmitting the electrical signal on a first surface and a power supply line for supplying an electrical power to the light-receiving module on a second surface opposing to the first surface, wherein the first lead terminal is connected to the transmission line on the substrate such that the first lead terminal is straitened and the second lead terminal is connected to the power supply line, and wherein the substrate is sandwiched by the first lead terminal and the second lead terminal.