Patent ID: 9720171
Date: 2017-08-01
CPC Classifications: G02B

Claim:
1. An opto-electric hybrid board, comprising: an electrical wiring board including a first substrate, an electrical wiring disposed on an inside of the first substrate or on a surface of the first substrate, and an electrical element mounted on the first substrate; and an optical waveguide film configured such that a signal associated with opto-electric conversion is transmitted between the optical waveguide film and the electrical wiring board and positioned on the electrical wiring board such that the electrical element is positioned between the optical waveguide film and the first substrate, wherein the optical waveguide film includes a core layer including a plurality of core sections and a side surface cladding section formed adjacent to a side surface of each of the core sections and an optical path conversion element configured to convert an optical path of the core sections, the core sections intersect each other on one plane, the core layer has a refractive index distribution in a width direction of the core layer such that the refractive index distribution has a maximum value, a first and second secondary maximum values smaller than the maximum value and a first and second minimum values in an order of the first secondary maximum value, the first minimum value, the maximum value, the second minimum value and the second secondary maximum value, a section between the first and second minimum values including the maximum value corresponds to the core section, and a section including the first or second secondary maximum value corresponds to the side surface cladding section.