Patent ID: 7054534

Claim:
A light scattering element for an optical waveguide on a substrate, where the core of the optical waveguide is comprised of: a slab of monocrystalline silicon, a layer of dielectric material disposed on the slab of monocrystalline silicon, and a strip of monocrystalline silicon disposed on a first layer of dielectric material, where the strip and a silicon body of a transistor are formed from the same monocrystalline silicon on the same substrate, the light scattering element is comprised of a structure formed in the strip of monocrystalline silicon, and a cladding comprised of a plurality of dielectric materials, where the cladding is disposed over the core and the structure, and at least one of the plurality of dielectric materials is comprised of a layer of salicide block used during the fabrication of a transistor.