Patent ID: 8428402
Filing Date: 2013-04-23
Classification: G02B,Y10T

Abstract:
1. An optical transmission module comprising: an optical module section comprising at least one of a reception module for converting an optical signal transmitted by an optical wiring to an electric signal or a transmission module section for converting the electric signal to the optical single and transmitting the optical signal through the optical wiring; a circuit substrate comprising an electric wiring for transmitting the electric signal; and a connecting section comprising an external connection terminal for providing the electric signal to the optical module section and the circuit substrate, wherein the optical module section and the connecting section being mounted on a same substrate surface of the circuit substrate, wherein the circuit substrate further comprises a bending portion bent so that the substrate surfaces oppose each other at the back in a normal direction, wherein the bending portion is arranged between the optical module section and the connecting section, wherein the optical module section and the connecting section are arranged in a normal direction of the circuit substrate due to the bend at the bending portion, wherein a plate-shaped reinforcement section for reducing an electrical coupling between the optical module section and the connecting section is arranged in a gap portion formed by the back surfaces of the substrate surfaces, wherein the reinforcement section comprises a three-layer structure in which a dielectric layer made of a dielectric body, and two metal layers made of metal for sandwiching the dielectric layer are stacked in the normal direction, wherein a first metal layer mostly arranged on the optical module section side is not grounded, and a second metal layer mostly arranged on the connecting section side is grounded, and wherein the optical module section comprises: