| 摘要 |
An optical module (A) includes a circuit board (2) mounted with a light receiving element (1), and a waveguide board (4) in which a waveguide (3) is formed. The circuit board is made of a flexible material, and has transmissivity for light having a wavelength received by the light receiving element. A circuit pattern part (5) is formed on a surface on one side of the circuit board, and the light receiving element is mounted on the circuit pattern part. An optical filter part (7) that transmits the light having the wavelength received by the light receiving element and that reflects light having other wavelengths, is formed on a surface on the other side of the circuit board by depositing a dielectric multilayer film. The waveguide board is connected to the optical filter part. In the light receiving element, a light receiving layer (1a) is disposed at a position outside from a region where the circuit pattern part is formed. An end portion of the waveguide of the waveguide board is optically connected to the light receiving layer of the light receiving element through the optical filter part and the circuit board.
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