Patent ID: 8633067

Claim:
A method of incorporating a photonics device into a CMOS manufacturing process flow comprising: providing a semiconductor substrate wherein the semiconductor substrate is a semiconductor on insulator substrate comprising a semiconductor material layer on a buried oxide layer; processing a first portion of the semiconductor substrate to form a CMOS device according to a CMOS manufacturing process flow; and processing a second portion of the semiconductor substrate according to a process flow for a photonics device comprising: patterning a semiconductor material layer in the semiconductor substrate to form first trenches between first pillars of semiconductor material; filling the first trenches with an insulator material; depositing a dielectric material over the second portion; opening a window in the dielectric material to expose an underlying first pillar of semiconductor material; depositing a layer of germanium over the first and second portions including over the dielectric material; depositing a first insulating layer over the germanium layer; patterning the germanium layer and first insulating layer over the second portion and removing the germanium layer and first insulating layer from the first portion; depositing a nitride layer over the germanium layer and first insulating layer so as to encapsulate the germanium layer and first insulating layer; opening the first insulating layer and the nitride layer to form an opening; depositing an oxide material over the first and second portions and in the opening; and depositing a metallic material to make contact with the germanium layer.