| abstract |
An optical waveguide with less interference between core portions, and an opto-electric hybrid board and an electronic device including the optical waveguide are provided. An optical waveguide includes a core layer in which a plurality of core portions are formed, a first clad layer that is stacked on one surface of the core layer, and the other surface of the core layer. A first cover film (first protective layer) 2 provided on the opposite side to the core layer 13 of the second cladding layer 12 and the first cladding layer 11, and the second cladding layer 12. Of these, the second cover film (second protective layer) 3 provided on the opposite side of the core layer 13 is provided, the separation distance between the adjacent core portions 14 is S, and the thickness of the first cladding layer 11 When the thickness is C, the relationship 0.1 <S / C <10 is satisfied. [Selection] Figure 1 |