Patent ID: 8005327
Filing Date: 2011-08-23
Classification: H01L,H04B

Abstract:
1. An optical transmission module, comprising: a substrate, a first transmission line for transmitting an electric signal, a resistance element used as a termination point, a second transmission line connected to the resistance element, and a surface ground pattern forming a coplanar line with the first and second transmission lines and located on a surface of the substrate, a modulator-integrated light-emitting element for outputting output light from an output end face, connected to the surface ground pattern, an electrode pad for modulator driving near the output end face on a top face of the modulator-integrated light-emitting element, a first wire connecting the first transmission line to the electrode pad, a second wire connecting the electrode pad to the second transmission line, and a first notch portion in the substrate at a point of intersection between a propagation path of the output light of the modulator-integrated light-emitting element and a first side face of the substrate, wherein the first and second transmission lines and the electrode pad are aligned.