Patent ID: 7079742

Claim:
A light scattering element for a strip loaded optical waveguide, where the core of the waveguide is comprised of: a slab of monocrystalline silicon on a substrate, where the slab and a silicon body of a transistor are formed from the same monocrystalline silicon on the same substrate, a layer of first dielectric material disposed on the slab of monocrystalline silicon, where the layer of first dielectric material and a gate oxide for a transistor are formed at the same time of the same dielectric material, and a strip of polysilicon disposed on the layer of first dielectric material, where the strip of polysilicon and a polysilicon gate for a transistor are formed at the same time from the same polysilicon, and the light scattering element is comprised of: a structure formed in the core of the optical waveguide, where the structure is not formed in the strip of polysilicon, 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.