Patent ID: 7095936

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