Patent ID: 9182544
Filing Date: 2015-11-10
Classification: G02B

Abstract:
1. A method of forming a planar light-wave circuit, the method comprising: patterning a first layer disposed on a substrate to form waveguides; forming modulator electrodes in a first metal level, surrounded by a first interlayer dielectric, and disposed over the substrate; forming routing interconnect, surrounded by a second interlayer dielectric, in at least a second metal level disposed over the first metal level, wherein portions of the first metal level is separated from the second metal level by the second interlayer dielectric; depositing an electro-optic material in a first recess disposed over a first waveguide in a first waveguide level and adjacent to the modulator electrodes; photo defining an optical mode expander in a material disposed over a second waveguide in a second waveguide level, wherein the first and second waveguide levels are different; and forming bump metallization disposed over, and coupled to, the routing interconnect.