| 摘要 |
<p>[Problems] An optical waveguide film which can be produced at a low cost, which is easy to have a large area and a long size, in which the shape of a plurality of cores is uniform and the cores are linearly and equidistantly arrayed in the transverse direction of the film, with which optical loss and variation in the optical waveguide performance among the cores is small, and which has a self-supporting property is provided. The optical waveguide film is suited for short, middle and long distances such as inter-apparatus communication and inter-board communication in an apparatus and inter-chip communication in a board. [Means for Solution] An optical waveguide film having a cross-sectional structure wherein claddings composed of a thermoplastic resin B and dispersions (cores) composed of a thermoplastic resin A extend in the machine direction of the film and are arrayed in the transverse direction of the film, the optical waveguide film comprising not less than 3 cores, diameters (We1, We2) of cores located at the both ends in the transverse direction of the film and diameter (Wc) of a core in the central portion in the transverse direction of the film satisfying the following Formulae (1) and (2), the optical waveguide film comprising a continuous cladding layer at at least one side thereof, the thicknesses of the cladding layers (Te1, Te2) at the both ends thereof in the transverse direction of the film and the thickness (Tc) of the cladding layer in the central portion in the transverse direction of the film satisfying the following Formulae (3) and (4): 0.8 ‰¤ We �¢ 1 / Wc ‰¤ 1.2 0.8 ‰¤ We �¢ 2 / Wc ‰¤ 1.2 0.8 ‰¤ Te �¢ 1 / Tc ‰¤ 1.2 0.8 ‰¤ Te �¢ 2 / Tc ‰¤ 1.2</p> |
