Patent ID: 7657145

Claim:
A method for fabrication of a multilayered optical waveguide structure which includes at least two substrates, and at least two optical waveguide layers each having at least one core region and side cladding regions laterally succeeding from the core region, one of said at least two optical waveguide layers being disposed between the substrates, comprising forming a first block by providing one of said at least two optical waveguide layers on a face of one of said at least two substrates; forming a second block by providing another of said at least two optical waveguide layers on a face of another of said at least two substrates; stacking said first block and said second block so that the optical waveguide layer of said first block is brought into direct contact with another face of the substrate of said second block, and heating the resultant stack of the first block and the second block while in such arrangement so that the first block and the second block are bonded together by the optical waveguide layer serving as a bonding layer to form the multilayered structure; wherein said optical waveguide layer is formed from a polysilane composition containing polysilane.