Patent ID: 7058273

Claim:
A light scattering element for an optical waveguide with a core, where the core of the optical waveguide is comprised of: a layer of monocrystalline silicon, a layer of dielectric material disposed on the layer of monocrystalline silicon, and a strip of monocrystalline silicon disposed on the 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, and the light scattering element is comprised of: a layer of polysilicon disposed on the strip of monocrystalline silicon, 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, where the cladding is disposed over: the core and the layer of polysilicon, and 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.