Optical module

1. An optical module, comprising:

a circuit board having a mount surface;

a photoelectric conversion element mounted on the mount surface of the circuit board;

an optical coupling member for holding an optical fiber and optically coupling the optical fiber and the photoelectric conversion element;

a semiconductor circuit element mounted on the mount surface of the circuit board and electrically connected to the photoelectric conversion element; and

a plate-shaped supporting substrate arranged to sandwich the optical coupling member between the supporting substrate and the circuit board,

wherein an electrically conductive metal foil which extends in a thickness direction of the supporting substrate is provided integrally with a side surface of the supporting substrate, and the metal foil is connected at one end thereof to an electrode provided on a non-mount surface of the circuit board; and

wherein the supporting substrate is formed by dicing a rod-shaped base material made of an insulation provided with an electrically conductive metal foil along a center axis at a cross section which is orthogonal to the center axis together with the metal foil.

2. The optical module according to claim 1 , wherein the optical coupling member includes a groove which opens toward a supporting substrate to receive a tip of the optical fiber, and the supporting substrate sandwiches the tip of the optical fiber received in the groove between the supporting substrate and the optical coupling member.

3. The optical module according to claim 2 , wherein the supporting substrate has such translucency that the tip of the optical fiber received in the groove is visible from a second plane opposite a first plane facing the optical coupling member.

4. The optical module according to claim 1 , wherein the optical coupling member includes a holding body for holding the optical fiber and a light guiding body for guiding light exiting from the optical fiber.