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Photodefinable benzocyclobutene as an optical waveguide material

Optical channel waveguides with single-mode dimensions have been fabricated using a photodefinable polymer system based on the benzocyclobutene resin and a bisarylazide photo- crosslinking agent. This photo-polymer offers a simple technique for fabricating optical interconnects in multi-chip modules. The processing conditions and developer selection required for the fabrication of benzocyclobutene optical waveguides is presented. With the losses in the waveguide typically less than 1 dB/cm, this material system is suitable for use in a variety of optical interconnect problems.