Patent ID: 7968274
Filing Date: 2011-06-28
Classification: G02B

Abstract:
1. An optical waveguide manufacturing method comprising the steps of: forming an under-cladding layer; forming a first core formation photosensitive resin layer on a surface of the under-cladding layer; exposing the first core formation photosensitive resin layer in a predetermined pattern to form a core defined by an exposed portion of the first photosensitive resin layer; covering surfaces of the core defined by the exposed portion of the first core formation photosensitive resin layer and an unexposed portion of the first core formation photosensitive resin layer with a second over-cladding layer formation photosensitive resin layer after the exposure; heating the first and second photosensitive resin layers to melt-mix a resin of the unexposed portion of the first core formation photosensitive resin layer and a resin of the second over-cladding layer formation photosensitive resin layer to form a mixture layer; and exposing the mixture layer to form a third cladding layer defined by the exposed mixture layer.