申请人:Sumitomo Bakelite Company, Ltd.
公开号:EP2083293A1
公开(公告)日:2009-07-29
An optical waveguide structure has excellent heat resistance and a low water absorbing property and can be manufactured with a low material cost. Such an optical waveguide structure includes: an optical waveguide having two surfaces, a core layer including core portions and cladding portions each having refractive index lower than that of each of the core portions, the core layer having two surfaces, and cladding layers provided so as to make contact with the two surfaces of the core layer and having a refractive index lower than that of each of the core portions; and conductor layers provided on the two surfaces of the optical waveguide. In the optical waveguide structure, each of the cladding layers is formed of a norbornene-based polymer as a major component thereof. Further, it is preferred that the norbornene-based polymer is composed of molecules each represented by the following formula 1 as a major component thereof:
wherein R is an alkyl group having a carbon number of 1 to 10, "a" is an integer of 0 to 3, "b" is an integer of 1 to 3, and "p" / "q" is 20 or less.
一种光波导结构具有优异的耐热性和低吸水性,并且可以用较低的材料成本制造。这种光波导结构包括:一个具有两个表面的光波导;一个芯层,包括芯部分和包层部分,每个部分的折射率都低于每个芯部分的折射率,芯层具有两个表面;以及包层,包层与芯层的两个表面接触,其折射率低于每个芯部分的折射率;以及设置在光波导两个表面上的导体层。在光波导结构中,每个包层都是由降冰片烯基聚合物作为主要成分形成的。此外,降冰片烯基聚合物的主要成分最好是由下式 1 所代表的分子组成:
其中 R 是碳原子数为 1 至 10 的烷基,"a "是 0 至 3 的整数,"b "是 1 至 3 的整数,"p"/"q "为 20 或以下。