Patent ID: 6054253
Filing Date: 2000-04-25
Classification: C08G,G02B,G03F

Abstract:
A process for fabricating a ridge waveguide on a substrate, comprising:producing a film of photosensitive sol-gel wave-propagating material on at least a portion of the substrate;applying a photomask to the film of photosensitive sol-gel wave-propagating material, the photomask having at least one opening outlining the ridge waveguide;exposing a portion of the film of photosensitive sol-gel wave-propagating material to ultraviolet radiation through said at least one opening of the photomask to render said portion of the film insoluble to a given solvent through the full thickness of said film and to imprint the ridge waveguide in said film; anddissolving the unexposed portion of the film of photosensitive sol-gel wavepropagating material by means of said solvent to leave on the substrate the exposed film portion and therefore the ridge waveguide.