Patent ID: 8395102

Claim:
A photoelectric conversion module comprising a photoelectric conversion element for converting an optical signal transmitted via an optical fiber into an electrical signal, and a signal output section for outputting to the exterior the electrical signal after photoelectric conversion, comprising: an impedance matching circuit that is provided between said photoelectric conversion element, or an amplifier that is connected to said photoelectric conversion element, and said signal output section, and a substrate upon which said impedance matching circuit is mounted; said impedance matching circuit comprises a plurality of metallic coating layers formed upon a surface of said substrate with gaps left between adjacent ones of these metallic coating layers, a plurality of metallic connecting lines that electrically connect adjacent ones of these metallic coating layers, and a metallic wire that connects said metallic layer that is most towards the input side to said photoelectric conversion element or to said amplifier that is connected to said photoelectric conversion element; wherein an isolating groove is formed upon a surface of said substrate at each gap between adjacent ones of said plurality of metallic coating layers.