Patent ID: 6859603

Claim:
A method for fabrication of vertically coupled integrated photonics devices, including the steps of: (a) forming a multi-layered structure having first and second levels and comprising: at least a first and a second waveguiding core layers, a coupling layer disposed between said at least first and second waveguiding core layers, and first and second cladding layers sandwiching said waveguiding core layers therebetween; (b) forming alignment marks extending substantially through said multi-layered structure at predetermined areas thereof, (c) forming first features at said first level of said multi-layered structure, said first features extending through said first cladding, said first waveguiding core layer and partially through said coupling layer; and (d) forming second features at said second level of said multi-layered structure, said second features extending through said second cladding, said second waveguiding core layer and partially through said coupling layer; whereby said first and second features are disposed at predetermined location with reference to said alignment marks identifiable at both said first and second levels of said multi-layered structure.