Optical semiconductor module and method for manufacturing same

TL;DR: In this article, an optical wave-guiding medium is allocated on a substrate and conductive resin is applied to the insulating resin and communicates with a ground plane connected with the ground terminal of the photo sensor.

Abstract: It is an object of the invention to provide a optical semiconductor module, which is resisting against external noise and can be easily fabricated. The optical semiconductor module comprises an optical wave-guiding medium (5) allocated on a substrate (2), a photosensor (3) for optical to electrical converting the optical signal emitted from an output end of the optical wave-guiding medium, means (11) for optically coupling the output end of the optical wave-guiding medium with a light-receiving surface of the photosensor, insulating resin (7,8) for filling space surrounding an output part of the optical wave-guiding medium and the photosensor, and conductive resin (10), which is applied to the insulating resin and communicates with a ground plane connected with a ground terminal of the photo sensor. Insulting resin (7,8) is composed of the first resin (7), which has a refractive index being the same as that of core of the optical wave-guiding medium, and fills a space between the output end of the wave-guiding medium and the light receiving surface of the photosensor, and the second resin (8), which is sealing resin for enclosing the first resin. Means for optically coupling is constituted of a mirror, which directs a light emitted from the optical wave-guiding medium to the photosensor.