Patent ID: 8227178
Filing Date: 2012-07-24
Classification: G02B

Abstract:
1. A method for manufacturing a planar optical waveguide device including a core of which a top face is provided with a groove section along a longitudinal direction of the core, the groove section being filled with a groove section filler made of a low refractive index material having a refractive index lower than a refractive index of the core, the method comprising; a first high refractive index material layer forming step of forming a high refractive index material layer made of a high refractive index material which constitutes a lower part of the core; a low refractive index material layer forming step of forming a low refractive index material layer made of the low refractive index material on said high refractive index material layer; a groove section filler forming step of forming the groove section filler by trimming both lateral portions of the low refractive index material layer by means of photolithography and etching; and a second high refractive index material layer forming step of forming a high refractive index material layer made of a high refractive index material which constitutes an upper part of the core so as to fill both sides of the lateral portions of said groove section filler.