Patent ID: 9329415
Filing Date: 2016-05-03
CPC Classification: G02B,G02F,H01L,H01P

Claim Text:
1. A method for forming an optical modulator, the method comprising: providing a substrate comprising a buried oxide layer; implanting dopants of a first conductivity type into the substrate to form a first doped region; implanting dopants of a second conductivity type into the substrate to form a second doped region; wherein a portion of the second doped region is formed over and overlaps with a portion of the first doped region to form a junction between the respective portions of the first doped region and the second doped region, wherein the respective portions of the first doped region and the second doped region are in contact with each other, wherein a remaining portion of the second doped region is located outside of the junction and formed over an intrinsic region of the substrate, wherein a bottom surface of the remaining portion of the second doped region overlaps and is directly on a top surface of the intrinsic region, wherein the first doped region, the second doped region and the intrinsic region are formed over the buried oxide layer; and wherein the intrinsic region is in between the remaining portion of the second doped region and the buried oxide layer; and forming a ridge waveguide, wherein the ridge waveguide overlaps with at least a part of the junction.