Patent ID: 6605228
Filing Date: 2003-08-12
Classification: G02B

Abstract:
A method for fabricating a planar optical waveguide device having a plurality of core segments formed between a lower clad layer and an upper clad layer, comprising the steps of:providing a lower clad layer; forming a recess corresponding to a desired pattern of core segments in said lower clad layer; forming a core layer on said lower clad layer including an interior of said recess; conducting a hot isostatic pressing process on an assembly of said lower clad layer and said core layer at a temperature higher than 800Â° C. and a pressure higher than 1,000 kgf/cm2; removing a surface layer from an assembly of said lower clad layer and said core layer until a surface of said lower clad layer is exposed, and said lower clad layer and said core layer in said recess jointly define a planar surface; and forming an upper clad layer on said planar surface jointly defined by said lower clad layer and said core layer.