| 摘要 |
<p>PURPOSE:To improve dielectric strength, optical transmission efficiency and common mode signal rejection ratio, by molding the light-receiving side of a light receiving element with a first transparent resin, and molding the light- emitting side of a luminous element with a second flexible resin of high transparency, the two elements of which are arranged on the same plane. CONSTITUTION:Each of a luminous element 2 and a light receiving element 3 is fixed to a lead-frame 1, 1' and arranged on the same plane. As to resin to be filled in the light transmission part between the luminous element 2 and the light receiving element 3, a first transparent resin 10 and a second flexible resin 11 of high transparency are used for a light-receiving side and a light- emitting side respectively, to form a light waveguide. The outer periphery of the light transmission part formed with the above both resins is molded with the same kind of a light-shielding resin as said first transparent resin 10. Common mode signal rejection ratio, optical transmission efficiency and, further, dielectric strength are improved, thereby.</p> |
