METHOD OF FORMING WAVEGUIDE USING THE PHOTODEFINABLE COMPOSITIONS AND WAVEGUIDE FORMED THEREFROM

摘要

PURPOSE: A method for forming a waveguide and a waveguide formed therefrom are provided to improve light-transmission properties and reduce insertion loss ratio by forming the rounded cross-section at an optical waveguide, and improve optical radiation. CONSTITUTION: A photodefinable composition layer is formed on a substrate(1). The substrate including the photodefinable composition layer is partially exposed. A waveguide core structure(10) is formed by developing the exposed layer. The waveguide core structure is heated to a temperature and for a time effective to reflow the waveguide core structure such that the waveguide core structure becomes at least partially rounded in cross-section.