Patent ID: 6961503

Claim:
A manufacturing method for a planar lightwave circuit device, comprising the steps of: depositing an undercladding layer on a substrate; depositing a core layer on said undercladding layer; etching said core layer to form a plurality of cores; depositing an overcladding layer on said undercladding layer so as to cover said cores; forming a lift-off mask layer on said overcladding layer; patterning said lift-off mask layer so as to form a plurality of first opening patterns respectively corresponding to said cores and a plurality of second opening patterns each formed on at least one side of each first opening pattern in spaced relationship therewith; depositing a conductive wiring pattern material layer on said lift-off mask layer; and stripping off said lift-off mask layer patterned to thereby form a plurality of first conductive patterns respectively corresponding to said cores and a plurality of second conductive patterns each formed on at least one side of each first conductive pattern in spaced relationship therewith, from said conductive wiring pattern material layer.